Environmental Pollution最新文献_第8页

Exposure to multiple air pollutants and self-reported symptoms in the ivorian fish smoker population 科特迪瓦吸鱼人群暴露于多种空气污染物和自我报告症状

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-27 DOI: 10.1016/j.envpol.2025.127601

Sophie Gnanguy , Amédée Ahi , Aicha Kra , Sedjro-Crésus Abouta , Adama Konaté , Franck Balducci , Sarah Montlevier , Christine Demeilliers , Renaud Persoons

Traditional fish smoking raises concerns about toxic exposures and their potential effects on workers' health. This study assessed external and internal exposures of Ivorian fish smokers to particles and organic compounds resulting from wood smoke, and the frequency of health symptoms self-reported by 96 fish smokers and 95 controls. The selected sites used traditional smokehouses based on mixed fuels (rubberwood, coconuts), burnt without any local exhaust ventilation. High ambient concentrations of PM₅ (2.2–12.3 mg/m³), polycyclic aromatic hydrocarbons (PAHs) (up to 113 μg/m³ for 2−4 rings and up to 1 μg/m³ for carcinogenic benzo(a)pyrene) and aldehydes (up to 3 ppm for formaldehyde) were measured. Significantly higher PM₅, PAH and aldehyde concentrations were measured in covered smokehouses than in uncovered ones. More than 150 volatile organic compounds (VOCs) were identified, the majority of which were BTEX (benzene, toluene, ethylbenzene, xylene). Biomonitoring showed higher exposures in fish smokers than in controls, with 2–4 ring PAHs being much more abundant (1−100 μmol/mol creatinine) than 5−ring BaP (<0.001 μmol/mol creatinine). The most frequently reported health symptoms in fish smokers were eye irritation (87 %), headaches (83 %), coughing (69 %), rhinorrhoea (59 %) and dizziness (58 %), whereas their frequency in controls did not exceed 3 %. Less experienced fish smokers more frequently reported skin and throat irritation than more experienced ones. This study highlighted high airborne concentrations of PM₅, PAHs and aldehydes in fish smoking sites. It also showed higher PAH exposures and more frequent health symptoms in fish smokers than in controls, indicating a possible contribution of exposure to pollutants in the reported health effects. It is therefore essential to promote the use of improved kilns, implement collective protective measures and prevent the health consequences of such exposures by dedicated medical follow-up.

传统的熏鱼方式引发了人们对有毒物质暴露及其对工人健康的潜在影响的担忧。本研究评估了科特迪瓦吸鱼者对木材烟雾产生的颗粒和有机化合物的外部和内部暴露，以及96名吸鱼者和95名对照者自我报告的健康症状频率。选定的地点使用基于混合燃料（橡胶木，椰子）的传统熏制房，在没有任何局部排气通风的情况下燃烧。测量到高环境浓度的PM5 (2.2-12.3 mg/m3)，多环芳烃（PAHs）（2 - 4环高达113 μg/m3，致癌物苯并(a)芘高达1 μg/m3）和醛（甲醛高达3 ppm）。有盖烟熏房的PM5、多环芳烃和醛浓度明显高于无盖烟熏房。鉴定出150多种挥发性有机化合物（VOCs），其中大部分是BTEX（苯、甲苯、乙苯、二甲苯）。生物监测结果显示，吸烟的鱼暴露量高于对照组，2 - 4环PAHs含量（1 - 100 μmol/mol肌酐）远高于5 -环BaP含量（0.001 μmol/mol肌酐）。食用鱼者最常报告的健康症状是眼睛刺激（87%）、头痛（83%）、咳嗽（69%）、鼻流（59%）和头晕（58%），而对照组的发病率不超过3%。与经验丰富的吸烟者相比，经验不足的吸烟者更经常报告皮肤和喉咙发炎。这项研究强调了鱼熏场空气中PM5、多环芳烃和醛类物质的高浓度。研究还显示，与对照组相比，食用鱼者接触多环芳烃的频率更高，出现的健康症状也更频繁，这表明在报告的健康影响中，接触污染物可能起到了一定作用。因此，必须促进使用改进的窑炉，实施集体保护措施，并通过专门的医疗后续行动预防这种接触造成的健康后果。

{"title":"Exposure to multiple air pollutants and self-reported symptoms in the ivorian fish smoker population","authors":"Sophie Gnanguy , Amédée Ahi , Aicha Kra , Sedjro-Crésus Abouta , Adama Konaté , Franck Balducci , Sarah Montlevier , Christine Demeilliers , Renaud Persoons","doi":"10.1016/j.envpol.2025.127601","DOIUrl":"10.1016/j.envpol.2025.127601","url":null,"abstract":"<div><div>Traditional fish smoking raises concerns about toxic exposures and their potential effects on workers' health. This study assessed external and internal exposures of Ivorian fish smokers to particles and organic compounds resulting from wood smoke, and the frequency of health symptoms self-reported by 96 fish smokers and 95 controls. The selected sites used traditional smokehouses based on mixed fuels (rubberwood, coconuts), burnt without any local exhaust ventilation. High ambient concentrations of PM<sub>5</sub> (2.2–12.3 mg/m<sup>3</sup>), polycyclic aromatic hydrocarbons (PAHs) (up to 113 μg/m<sup>3</sup> for 2−4 rings and up to 1 μg/m<sup>3</sup> for carcinogenic benzo(a)pyrene) and aldehydes (up to 3 ppm for formaldehyde) were measured. Significantly higher PM<sub>5</sub>, PAH and aldehyde concentrations were measured in covered smokehouses than in uncovered ones. More than 150 volatile organic compounds (VOCs) were identified, the majority of which were BTEX (benzene, toluene, ethylbenzene, xylene). Biomonitoring showed higher exposures in fish smokers than in controls, with 2–4 ring PAHs being much more abundant (1−100 μmol/mol creatinine) than 5−ring BaP (<0.001 μmol/mol creatinine). The most frequently reported health symptoms in fish smokers were eye irritation (87 %), headaches (83 %), coughing (69 %), rhinorrhoea (59 %) and dizziness (58 %), whereas their frequency in controls did not exceed 3 %. Less experienced fish smokers more frequently reported skin and throat irritation than more experienced ones. This study highlighted high airborne concentrations of PM<sub>5</sub>, PAHs and aldehydes in fish smoking sites. It also showed higher PAH exposures and more frequent health symptoms in fish smokers than in controls, indicating a possible contribution of exposure to pollutants in the reported health effects. It is therefore essential to promote the use of improved kilns, implement collective protective measures and prevent the health consequences of such exposures by dedicated medical follow-up.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127601"},"PeriodicalIF":7.3,"publicationDate":"2025-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impairment of zebrafish (Danio rerio) oogenesis and F1 embryonic development by maternal methylparaben exposure: Insights from transcriptomic analysis 母体甲基羟基苯甲酸暴露对斑马鱼（Danio rerio）卵发生和F1胚胎发育的损害：来自转录组学分析的见解

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-27 DOI: 10.1016/j.envpol.2025.127610

Xin Li , Qiaohong Xiao , Qiuyue Liao , Chunhui Hu , Jiaolong Huang , Mingqun Li , Nannan Cao , Jie Deng , Peng Duan

Methylparaben (MP) is a commonly utilized preservative that has been associated with potential toxic effects on the reproductive, nervous, and endocrine systems. However, research on the intergenerational toxic impacts of MP exposure, particularly in zebrafish, remains limited. To address this gap and to elucidate the underlying mechanisms, this study aimed to investigate the effects of MP exposure on female reproductive impairment and embryonic developmental toxicity. Maternal zebrafish were subjected to environmentally relevant concentrations of MP (1 and 100 μg/L) for 4 weeks. Following this exposure, the exposed female zebrafish (F0♀+) were paired with unexposed male zebrafish (F0♂−), and their fertilized F1 progeny were reared in uncontaminated water for 120 h. Compared with the control group (F0♀−), F0♀+ exhibited a diminished proportion of mature oocytes and reduced egg production, alongside decreased estrogen levels and activation of the focal adhesion signaling pathway. Moreover, maternal exposure to MP was associated with developmental anomalies in the F1 offspring, including yolk sac and pericardial edema, an increased heart rate, and reduced body length. Additionally, there was an enhancement in spontaneous movement and an inhibition of motor behavior in the F1 larvae. Corroborating these phenotypic observations, maternal MP exposure induced global transcriptomic alterations related to growth and development processes, cardiac development, nervous system processes, and metabolic signaling pathways in the unexposed F1 offspring. Notably, the focal adhesion, extracellular matrix (ECM)-receptor interaction, and phosphoinositide 3-kinase (PI3K)-Akt signaling pathways were significantly enriched in these unexposed F1 offspring. Collectively, this study reveals that subchronic MP exposure impairs oogenesis and reduces fertility in adult female zebrafish, while also causing embryonic developmental toxicity in their F1 progeny. As the investigation into the intergenerational effects of maternal MP exposure in zebrafish, it establishes a crucial foundation for assessing the ecotoxicological impacts of MP.

对羟基苯甲酸甲酯（MP）是一种常用的防腐剂，对生殖、神经和内分泌系统有潜在的毒性作用。然而，关于MP暴露的代际毒性影响的研究，特别是在斑马鱼中，仍然有限。为了解决这一空白并阐明潜在的机制，本研究旨在探讨MP暴露对女性生殖功能障碍和胚胎发育毒性的影响。母斑马鱼接受环境相关浓度的MP（1和100 μg/L）治疗4周。暴露后，将暴露的雌斑马鱼（F0♀+）与未暴露的雄斑马鱼（F0♂−）配对，将它们的受精后代F1在未污染的水中饲养120小时。与对照组（F0♀−）相比，F0♀+表现出成熟卵母细胞比例减少，产卵量减少，雌激素水平降低，局灶粘连信号通路激活。此外，母体暴露于MP与F1后代的发育异常有关，包括卵黄囊和心包水肿、心率增加和体长缩短。此外，F1幼虫的自发运动能力增强，运动行为受到抑制。在未暴露的F1后代中，母体MP暴露诱导了与生长发育过程、心脏发育、神经系统过程和代谢信号通路相关的全局转录组改变，证实了这些表型观察结果。值得注意的是，在这些未暴露的F1后代中，局灶黏着、细胞外基质(ECM)-受体相互作用和磷酸肌肽3激酶(PI3K)-Akt信号通路显著丰富。总的来说，这项研究揭示了亚慢性MP暴露会损害成年雌性斑马鱼的卵发生和生育能力，同时也会对它们的F1后代造成胚胎发育毒性。研究母体MP暴露在斑马鱼体内的代际效应，为评估MP的生态毒理学影响奠定了重要基础。

{"title":"Impairment of zebrafish (Danio rerio) oogenesis and F1 embryonic development by maternal methylparaben exposure: Insights from transcriptomic analysis","authors":"Xin Li , Qiaohong Xiao , Qiuyue Liao , Chunhui Hu , Jiaolong Huang , Mingqun Li , Nannan Cao , Jie Deng , Peng Duan","doi":"10.1016/j.envpol.2025.127610","DOIUrl":"10.1016/j.envpol.2025.127610","url":null,"abstract":"<div><div>Methylparaben (MP) is a commonly utilized preservative that has been associated with potential toxic effects on the reproductive, nervous, and endocrine systems. However, research on the intergenerational toxic impacts of MP exposure, particularly in zebrafish, remains limited. To address this gap and to elucidate the underlying mechanisms, this study aimed to investigate the effects of MP exposure on female reproductive impairment and embryonic developmental toxicity. Maternal zebrafish were subjected to environmentally relevant concentrations of MP (1 and 100 μg/L) for 4 weeks. Following this exposure, the exposed female zebrafish (F0♀+) were paired with unexposed male zebrafish (F0♂−), and their fertilized F1 progeny were reared in uncontaminated water for 120 h. Compared with the control group (F0♀−), F0♀+ exhibited a diminished proportion of mature oocytes and reduced egg production, alongside decreased estrogen levels and activation of the focal adhesion signaling pathway. Moreover, maternal exposure to MP was associated with developmental anomalies in the F1 offspring, including yolk sac and pericardial edema, an increased heart rate, and reduced body length. Additionally, there was an enhancement in spontaneous movement and an inhibition of motor behavior in the F1 larvae. Corroborating these phenotypic observations, maternal MP exposure induced global transcriptomic alterations related to growth and development processes, cardiac development, nervous system processes, and metabolic signaling pathways in the unexposed F1 offspring. Notably, the focal adhesion, extracellular matrix (ECM)-receptor interaction, and phosphoinositide 3-kinase (PI3K)-Akt signaling pathways were significantly enriched in these unexposed F1 offspring. Collectively, this study reveals that subchronic MP exposure impairs oogenesis and reduces fertility in adult female zebrafish, while also causing embryonic developmental toxicity in their F1 progeny. As the investigation into the intergenerational effects of maternal MP exposure in zebrafish, it establishes a crucial foundation for assessing the ecotoxicological impacts of MP.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127610"},"PeriodicalIF":7.3,"publicationDate":"2025-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leaching mechanisms of potentially toxic elements from coal gangue: Thermodynamic, kinetic, and colloidal effects 煤矸石中潜在有毒元素的浸出机制：热力学、动力学和胶体效应

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-26 DOI: 10.1016/j.envpol.2025.127609

Siqi Xu , Yufei Yang , Weishi Li , Yongqi Lu , Haolin Yang , Qifei Huang , Qingqi Die

Coal mining generates substantial quantities of coal gangue (CG) as a by-product. Limited reuse pathways have led to extensive and long-term surface accumulation of CG. Precipitation intensifies the leaching and migration of potentially toxic elements (PTEs) from CG, posing severe environmental risks to mining ecosystems. However, the migration behavior and environmental impacts of PTEs are poorly understood. This study collected representative CG samples from the middle reaches of the Yellow River Basin, China, and systematically investigated the thermodynamic, kinetic, and colloidal processes governing PTE release. Results indicated that pH was the dominant factor influencing PTE concentrations, and PTE release was primarily controlled by pH-dependent thermodynamic dissolution. Geochemical modeling revealed the principal mineral phases responsible for liquid–solid partitioning under different pH conditions. Kinetic analysis showed that the release of most PTEs (As, Cu, Mn, Pb, Sb, and Tl) was best described by the parabolic model, exhibiting rapid release during the initial stage followed by diffusion-controlled behavior at later stages. The release of Zn was best captured by the second-order kinetic model, whereas the release behaviors of Co, Ni, and Se were best described by the Elovich model. Approximately 6.2–33.4 % of total PTEs existed in colloid-bound form. TEM-EDS and TOF-SIMS analyses demonstrated that Al–Si colloids adsorbed Co, Ni, Pb, Tl, and Zn ions through outer- and inner-sphere coordination, thereby amplifying PTE migration. This study identified As, Co, Cu, Mn, Ni, Pb, Sb, Se, Tl, and Zn as the primary environmental risk elements in CG, with maximum leaching concentrations exceeding national water quality standards by factors of 1.1–46.6. These findings provide critical evidence for pollution control and environmental risk assessment of CG stockpiles in mining areas.

煤矿开采产生大量的煤矸石（CG）作为副产品。有限的再利用途径导致了CG的广泛和长期的表面积累。降水加剧了CG中潜在有毒元素（pte）的浸出和迁移，对采矿生态系统构成严重的环境风险。然而，人们对pte的迁移行为和环境影响知之甚少。本研究收集了黄河中游地区具有代表性的CG样品，系统研究了PTE释放的热力学、动力学和胶体过程。结果表明，pH是影响PTE浓度的主要因素，PTE的释放主要受pH依赖的热力学溶解控制。地球化学模拟揭示了在不同pH条件下负责液固分配的主要矿物相。动力学分析表明，大多数pte （As、Cu、Mn、Pb、Sb和Tl）的释放符合抛物线模型，在初始阶段表现为快速释放，后期表现为扩散控制行为。二级动力学模型最能描述Zn的释放行为，而Elovich模型最能描述Co、Ni和Se的释放行为。大约6.2 - 33.4%的pte以胶体形式存在。TEM-EDS和TOF-SIMS分析表明，Al-Si胶体通过内外配位吸附Co、Ni、Pb、Tl和Zn离子，从而增强了PTE的迁移。本研究确定As、Co、Cu、Mn、Ni、Pb、Sb、Se、Tl、Zn为CG的主要环境风险元素，最大浸出浓度超过国家水质标准的系数为1.1 ~ 46.6。这些发现为矿区CG库存的污染控制和环境风险评价提供了重要依据。

{"title":"Leaching mechanisms of potentially toxic elements from coal gangue: Thermodynamic, kinetic, and colloidal effects","authors":"Siqi Xu , Yufei Yang , Weishi Li , Yongqi Lu , Haolin Yang , Qifei Huang , Qingqi Die","doi":"10.1016/j.envpol.2025.127609","DOIUrl":"10.1016/j.envpol.2025.127609","url":null,"abstract":"<div><div>Coal mining generates substantial quantities of coal gangue (CG) as a by-product. Limited reuse pathways have led to extensive and long-term surface accumulation of CG. Precipitation intensifies the leaching and migration of potentially toxic elements (PTEs) from CG, posing severe environmental risks to mining ecosystems. However, the migration behavior and environmental impacts of PTEs are poorly understood. This study collected representative CG samples from the middle reaches of the Yellow River Basin, China, and systematically investigated the thermodynamic, kinetic, and colloidal processes governing PTE release. Results indicated that pH was the dominant factor influencing PTE concentrations, and PTE release was primarily controlled by pH-dependent thermodynamic dissolution. Geochemical modeling revealed the principal mineral phases responsible for liquid–solid partitioning under different pH conditions. Kinetic analysis showed that the release of most PTEs (As, Cu, Mn, Pb, Sb, and Tl) was best described by the parabolic model, exhibiting rapid release during the initial stage followed by diffusion-controlled behavior at later stages. The release of Zn was best captured by the second-order kinetic model, whereas the release behaviors of Co, Ni, and Se were best described by the Elovich model. Approximately 6.2–33.4 % of total PTEs existed in colloid-bound form. TEM-EDS and TOF-SIMS analyses demonstrated that Al–Si colloids adsorbed Co, Ni, Pb, Tl, and Zn ions through outer- and inner-sphere coordination, thereby amplifying PTE migration. This study identified As, Co, Cu, Mn, Ni, Pb, Sb, Se, Tl, and Zn as the primary environmental risk elements in CG, with maximum leaching concentrations exceeding national water quality standards by factors of 1.1–46.6. These findings provide critical evidence for pollution control and environmental risk assessment of CG stockpiles in mining areas.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127609"},"PeriodicalIF":7.3,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing microplastic mobility from soils amended with sewage sludge under different land use and rainfall scenarios 不同土地利用和降雨情景下污水污泥改良土壤微塑料流动性的评估

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-26 DOI: 10.1016/j.envpol.2025.127608

Sara Martínez-Pérez , Isabel Fernández Artime , Ana García Arcos , Raffaella Meffe , Andreu Rico , Virtudes Martínez-Hernández

Sewage sludge applied in agricultural fields as fertilizer is considered one of the major contributors to microplastic (MP) pollution in soil ecosystems. This study assessed the environmental fate of MPs in soils amended with sewage sludge, using experimental units with uncontaminated soil (control), bare soil amended with sewage sludge (sludge), and soil amended with sludge and cultivated with alfalfa (alfalfa), in a greenhouse experiment. The influence of three high rainfall intensities (137 mm/h, 220 mm/h, and 318 mm/h) on MP mobility by runoff and/or infiltration was evaluated. Results showed that MPs in topsoil (0–5 cm) had a limited mobility over the five-month experimental period. In bare soils, 0.32 % of MPs were transported by runoff and 0.008 % by infiltration, indicating that runoff is a more relevant process than infiltration. In soils planted with alfalfa, the amounts mobilized by runoff and infiltration were significantly lower (0.004 % and 0.002 %, respectively) than in the bare soil treatment. This can be attributed to the crop's ability to stabilize the soil and the plant-mediated capture. Despite higher water runoff volumes generated by increasing rainfall intensities, the MP mobilization rates remained unchanged, indicating a limited influence of water volume at high-to-extreme rainfall intensities. Most MPs detected in the sewage sludge consisted of polyester fibres of varying sizes. Larger fibres were more susceptible to mobilization by runoff, while the smaller ones were more trapped into the topsoil. This study underscores the significant capacity of agricultural soils to retain MPs and highlights the role of crops in conditioning MP mobility.

农业污泥作为肥料被认为是土壤生态系统中微塑料污染的主要来源之一。本研究在温室试验中，采用未污染土壤（对照）、污水污泥改性的裸土（污泥）和污泥改性并种植苜蓿的土壤（苜蓿）作为试验单元，评估了污泥改性土壤中MPs的环境命运。研究了3种高降雨强度（137 mm/h、220 mm/h和318 mm/h）对径流和/或入渗对MP迁移的影响。结果表明，在5个月的试验期内，表层土壤（0-5 cm） MPs的流动性有限。在裸地土壤中，0.32%的MPs通过径流输送，0.008%通过入渗输送，表明径流比入渗更重要。在种植苜蓿的土壤中，径流和入渗动员量显著低于裸地（分别为0.004%和0.002%）。这可以归因于作物稳定土壤的能力和植物介导的捕获。尽管降雨强度增加产生了更高的径流量，但MP动员率保持不变，表明在高至极端降雨强度下，水量的影响有限。在污水污泥中检测到的大多数MPs由不同大小的聚酯纤维组成。较大的纤维更容易被径流动员，而较小的纤维更容易被困在表土中。这项研究强调了农业土壤保留MPs的重要能力，并强调了作物在调节MPs流动性中的作用。

{"title":"Assessing microplastic mobility from soils amended with sewage sludge under different land use and rainfall scenarios","authors":"Sara Martínez-Pérez , Isabel Fernández Artime , Ana García Arcos , Raffaella Meffe , Andreu Rico , Virtudes Martínez-Hernández","doi":"10.1016/j.envpol.2025.127608","DOIUrl":"10.1016/j.envpol.2025.127608","url":null,"abstract":"<div><div>Sewage sludge applied in agricultural fields as fertilizer is considered one of the major contributors to microplastic (MP) pollution in soil ecosystems. This study assessed the environmental fate of MPs in soils amended with sewage sludge, using experimental units with uncontaminated soil (control), bare soil amended with sewage sludge (sludge), and soil amended with sludge and cultivated with alfalfa (alfalfa), in a greenhouse experiment. The influence of three high rainfall intensities (137 mm/h, 220 mm/h, and 318 mm/h) on MP mobility by runoff and/or infiltration was evaluated. Results showed that MPs in topsoil (0–5 cm) had a limited mobility over the five-month experimental period. In bare soils, 0.32 % of MPs were transported by runoff and 0.008 % by infiltration, indicating that runoff is a more relevant process than infiltration. In soils planted with alfalfa, the amounts mobilized by runoff and infiltration were significantly lower (0.004 % and 0.002 %, respectively) than in the bare soil treatment. This can be attributed to the crop's ability to stabilize the soil and the plant-mediated capture. Despite higher water runoff volumes generated by increasing rainfall intensities, the MP mobilization rates remained unchanged, indicating a limited influence of water volume at high-to-extreme rainfall intensities. Most MPs detected in the sewage sludge consisted of polyester fibres of varying sizes. Larger fibres were more susceptible to mobilization by runoff, while the smaller ones were more trapped into the topsoil. This study underscores the significant capacity of agricultural soils to retain MPs and highlights the role of crops in conditioning MP mobility.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127608"},"PeriodicalIF":7.3,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction and application of a high-resolution pollen numerical model system based on phenology and XGBoost 基于物候学和XGBoost的高分辨率花粉数值模型系统构建与应用

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-26 DOI: 10.1016/j.envpol.2025.127607

Jiangtao Li , Xingqin An , Zhe Liu , Fan Zhao , Huaerqi Huang , Qing Hou , Yu Wang

The allergenic characteristics of anemophilous pollen differ among taxa, and its atmospheric concentration plays a critical role in influencing allergy risks and health assessments. Based on phenology and artificial intelligence methods, the study constructed a high-precision pollen numerical model system using 15-year pollen monitoring data of Beijing in spring. The model system considered the phenological phases and multiple plant taxa, and based on thermal accumulation, optimized the start and end dates of pollen release for Cupressaceae and Salicaceae (Stage I) and Pinaceae (Stage II). A normalized pollen emission potential model was constructed by integrating dual-threshold temperature accumulation with phenological probability. XGBoost was used to simulate seasonal pollen integral (SPIn), enabling spatiotemporal modeling of spring pollen emission. To represent pollen transport and dispersion in the atmosphere, a new pollen module was incorporated into the WRF-Chem framework, coupling pollen emission with meteorological adjustment factors such as wind speed, precipitation, and humidity, thus forming the WRF-Chem-Pollen system for high-resolution, hourly pollen simulations. The model demonstrated strong performance, with R exceeding 0.60 in 60 % of the years, confirming its spatiotemporal reliability. Further analysis revealed a compound influence of meteorological factors on SPIn, characterized by a “early-season promotion and late-season suppression” effect within distinct time windows. Stage I pollen dominated spring loads, while Stage II contributions were more stable. Overall, this study establishes a comprehensive framework for modeling spring pollen and elucidates the meteorological drivers of pollen release. The findings provide scientific support for pollen exposure assessment, health forecasting, and urban ecological management.

不同类群的风花粉具有不同的致敏特性，其大气浓度对风花粉的致敏风险和健康评价具有重要影响。基于物候学和人工智能方法，利用北京市15年春季花粉监测数据，构建了高精度的花粉数值模型系统。该模型系统考虑了物候期和多个植物类群，并基于热积累优化了柏科、水杨科（阶段1）和松科（阶段2）的花粉释放起始和结束时间。将双阈值温度积累与物候概率相结合，构建归一化花粉发射势模型。利用XGBoost模拟季节花粉积分（SPIn），实现春季花粉释放的时空建模。为了描述花粉在大气中的运输和分散，在WRF-Chem框架中加入了一个新的花粉模块，将花粉发射与风速、降水和湿度等气象调节因子耦合，形成WRF-Chem- pollen系统，用于高分辨率、逐时的花粉模拟。模型表现出较强的性能，60%的年份R值超过0.60，证实了模型的时空可靠性。进一步分析发现气象因子对SPIn的复合影响，在不同的时间窗内表现为“季前促进、季后抑制”效应。第一阶段花粉占主导地位，第二阶段贡献更稳定。总体而言，本研究建立了春季花粉模型的综合框架，阐明了花粉释放的气象驱动因素。研究结果为花粉暴露评价、健康预测和城市生态管理提供了科学依据。

{"title":"Construction and application of a high-resolution pollen numerical model system based on phenology and XGBoost","authors":"Jiangtao Li , Xingqin An , Zhe Liu , Fan Zhao , Huaerqi Huang , Qing Hou , Yu Wang","doi":"10.1016/j.envpol.2025.127607","DOIUrl":"10.1016/j.envpol.2025.127607","url":null,"abstract":"<div><div>The allergenic characteristics of anemophilous pollen differ among taxa, and its atmospheric concentration plays a critical role in influencing allergy risks and health assessments. Based on phenology and artificial intelligence methods, the study constructed a high-precision pollen numerical model system using 15-year pollen monitoring data of Beijing in spring. The model system considered the phenological phases and multiple plant taxa, and based on thermal accumulation, optimized the start and end dates of pollen release for Cupressaceae and Salicaceae (Stage I) and Pinaceae (Stage II). A normalized pollen emission potential model was constructed by integrating dual-threshold temperature accumulation with phenological probability. XGBoost was used to simulate seasonal pollen integral (SPIn), enabling spatiotemporal modeling of spring pollen emission. To represent pollen transport and dispersion in the atmosphere, a new pollen module was incorporated into the WRF-Chem framework, coupling pollen emission with meteorological adjustment factors such as wind speed, precipitation, and humidity, thus forming the WRF-Chem-Pollen system for high-resolution, hourly pollen simulations. The model demonstrated strong performance, with R exceeding 0.60 in 60 % of the years, confirming its spatiotemporal reliability. Further analysis revealed a compound influence of meteorological factors on SPIn, characterized by a “early-season promotion and late-season suppression” effect within distinct time windows. Stage I pollen dominated spring loads, while Stage II contributions were more stable. Overall, this study establishes a comprehensive framework for modeling spring pollen and elucidates the meteorological drivers of pollen release. The findings provide scientific support for pollen exposure assessment, health forecasting, and urban ecological management.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127607"},"PeriodicalIF":7.3,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding petroleum hydrocarbon pollution characteristics on urban roads 了解城市道路石油烃污染特征

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-26 DOI: 10.1016/j.envpol.2025.127606

Quan Zhang , Nian Hong , An Liu

Accurate characterization of urban road pollution is imperative for safeguarding stormwater quality in harvesting or discharge scenarios. Petroleum hydrocarbons (PHCs, including volatile (VOCs), semi-volatile (SVOCs), and non-volatile organic compounds (NVOCs)), primarily from traffic emissions, tire wear, and fuel leakage, pose significant environmental and health risks. This necessitates understanding the spatiotemporal distribution of VOCs, SVOCs, and NVOCs to guide mitigation. This study characterized dry-period PHC deposition on urban roads, analyzing determinants including total solids (TS) load, land use, season, traffic volume, and road condition. Size-resolved PHC deposition loads (μg/m²) were quantified across particulate fractions. Results identified TS load and seasonal variation as primary factors. For instance, fine particles (<75 μm), comprising only approximately 10 % (summer) and 25 % (winter) of TS mass, adsorbed 78.2 % and 70.8 % of ΣPHCs, respectively. SVOCs and NVOCs persistently associated with fines across seasons, while VOCs showed thermally mediated adsorption: fines dominated in summer (promoting volatilization), shifting to coarse fractions (≥300 μm) in winter (enhancing deposition). Precipitation and temperature drove these seasonal patterns. Lower temperatures and less rainfall promoted greater deposition in winter, resulting in an over 150 % increase in ΣPHC loads compared to that in summer. Therefore, the particle-size-resolved data demonstrate that the interplay between PHC volatility, particle size, and seasonality is a critical driver of PHC fate. Conventional mass-based methods for TS assessment, which do not account for this interplay, are therefore insufficient. These findings collectively highlight the need for particle-size-resolved and seasonally adaptive modelling approaches and mitigation strategies applicable to PHCs of varying volatility.

准确地描述城市道路污染对于在收集或排放的情况下保护雨水质量至关重要。石油碳氢化合物（PHCs，包括挥发性（VOCs）、半挥发性（SVOCs）和非挥发性有机化合物（NVOCs））主要来自交通排放、轮胎磨损和燃料泄漏，构成重大的环境和健康风险。这就需要了解VOCs、SVOCs和NVOCs的时空分布，以指导减缓工作。本研究描述了干旱时期城市道路上PHC沉积的特征，分析了总固体（TS）负荷、土地利用、季节、交通量和道路状况等决定因素。对不同颗粒组分的PHC沉积负荷（μg/m2）进行了定量分析。结果表明，TS负荷和季节变化是主要影响因素。例如，仅占TS质量约10%（夏季）和25%（冬季）的细颗粒（<75 μm）分别吸附了78.2%和70.8%的ΣPHCs。SVOCs和NVOCs在不同季节均与细颗粒物密切相关，而VOCs则表现为热吸附：夏季细颗粒物占主导地位（促进挥发），冬季向粗颗粒物（≥300 μm）转变（促进沉积）。降水和温度驱动了这些季节模式。冬季较低的温度和较少的降雨促进了更多的沉积，导致ΣPHC负荷比夏季增加150%以上。因此，粒径分解数据表明，PHC挥发性、粒径和季节性之间的相互作用是PHC命运的关键驱动因素。传统的基于质量的TS评估方法没有考虑到这种相互作用，因此是不够的。这些研究结果共同强调，有必要采用粒径分辨和季节性适应的建模方法，以及适用于不同挥发性PHCs的减缓战略。

{"title":"Understanding petroleum hydrocarbon pollution characteristics on urban roads","authors":"Quan Zhang , Nian Hong , An Liu","doi":"10.1016/j.envpol.2025.127606","DOIUrl":"10.1016/j.envpol.2025.127606","url":null,"abstract":"<div><div>Accurate characterization of urban road pollution is imperative for safeguarding stormwater quality in harvesting or discharge scenarios. Petroleum hydrocarbons (PHCs, including volatile (VOCs), semi-volatile (SVOCs), and non-volatile organic compounds (NVOCs)), primarily from traffic emissions, tire wear, and fuel leakage, pose significant environmental and health risks. This necessitates understanding the spatiotemporal distribution of VOCs, SVOCs, and NVOCs to guide mitigation. This study characterized dry-period PHC deposition on urban roads, analyzing determinants including total solids (TS) load, land use, season, traffic volume, and road condition. Size-resolved PHC deposition loads (μg/m<sup>2</sup>) were quantified across particulate fractions. Results identified TS load and seasonal variation as primary factors. For instance, fine particles (<75 μm), comprising only approximately 10 % (summer) and 25 % (winter) of TS mass, adsorbed 78.2 % and 70.8 % of ΣPHCs, respectively. SVOCs and NVOCs persistently associated with fines across seasons, while VOCs showed thermally mediated adsorption: fines dominated in summer (promoting volatilization), shifting to coarse fractions (≥300 μm) in winter (enhancing deposition). Precipitation and temperature drove these seasonal patterns. Lower temperatures and less rainfall promoted greater deposition in winter, resulting in an over 150 % increase in ΣPHC loads compared to that in summer. Therefore, the particle-size-resolved data demonstrate that the interplay between PHC volatility, particle size, and seasonality is a critical driver of PHC fate. Conventional mass-based methods for TS assessment, which do not account for this interplay, are therefore insufficient. These findings collectively highlight the need for particle-size-resolved and seasonally adaptive modelling approaches and mitigation strategies applicable to PHCs of varying volatility.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127606"},"PeriodicalIF":7.3,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymer type more strongly than concentration drives root responses to microplastics: root biomass–efficiency trade-offs and biogeochemical risks in coastal wetlands 聚合物类型比浓度更强烈地驱动根系对微塑料的响应：沿海湿地根系生物量效率权衡和生物地球化学风险

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-26 DOI: 10.1016/j.envpol.2025.127603

Pengcheng Jiang , Jingwen Gao , Xiaofei Ye , Ming Wu , Xuexin Shao , Niu Li

Coastal wetlands, critical for global carbon sequestration and nitrogen removal, face escalating threats from microplastics (MPs) pollution. Yet, whether MPs effects are governed primarily by concentration or polymer type remains unresolved, impeding risk assessment accuracy. Here, through a mesocosm experiment with Scirpus mariqueter, we demonstrate that polymer type more strongly than concentration shapes root morphological and stoichiometric responses to four globally prevalent MP polymers (PP, PET, PS, PE), whereas effects on soil biogeochemistry are more complex and often interactive with concentration. MPs induced a morphological coping strategy characterized by a biomass–efficiency trade-off in roots: despite significant reductions in root biomass (−22.4 % to −35.0 %) and root-to-shoot ratio (−11.1 % to −36.1 %), plants dramatically increased root efficiency traits, including root length (+31.3–43.7 %), root surface area (+30.3 %), specific root length (+67.6–186 %), and specific root surface area (+79.8 %). Concurrently, root nitrogen (−13.5–29.7 %) and phosphorus (−35.9 %) contents declined, elevating C:N (up to +35.8 %) and C:P ratios (up to +105.3 %). Crucially, microplastic polymer types generated antagonistic soil effects: PP elevated soil total carbon (+7.5 %), whereas PE amplified root carbon (+10.0 %); all polymers depleted soil total nitrogen (−29.5 to −36.9 % at 1 %) and tended to shift inorganic N toward nitrate accumulation, particularly under PET, PE, and PS (+8.3−12.3 %). Random forest models showed that root responses were primarily associated with the water–salt balance—soil water content, electrical conductivity, salinity, and pH—and with inorganic nitrogen availability (NO₃⁻-N and NH₄⁺-N), indicating that key edaphic conditions mediate the effects of microplastics on root traits. Our findings refine microplastic risk paradigms: polymer specificity, rather than dosage alone, primarily controls wetland plant adaptation, while biogeochemical functions respond to polymer identity through more complex and often dose-dependent pathways, demanding polymer-specific management frameworks for preserving these vital ecosystems.

沿海湿地对全球碳固存和氮去除至关重要，但微塑料污染的威胁日益加剧。然而，MPs效应是否主要由浓度或聚合物类型决定仍未解决，阻碍了风险评估的准确性。本研究中，通过对海荆芥（Scirpus mariqueter）的中尺度实验，我们发现聚合物类型比浓度更能影响根系对四种全球流行的MP聚合物（PP、PET、PS、PE）的形态和化学计量学响应，而对土壤生物地球化学的影响则更为复杂，并且往往与浓度相互作用。MPs诱导了一种以根系生物量效率权衡为特征的形态应对策略：尽管根系生物量（- 22.4%至- 35.0%）和根冠比（- 11.1%至- 36.1%）显著减少，但植物的根系效率性状显著提高，包括根长（+ 31.3%至43.7%）、根表面积（+ 30.3%）、比根长（+67.6至186%）和比根表面积（+ 79.8%）。同时，根系氮（- 13.5 ~ 29.7%）和磷（- 35.9%）含量下降，C:N（+ 35.8%）和C:P（+ 105.3%）比值升高。关键是，微塑料聚合物类型产生了拮抗土壤效应：PP提高了土壤总碳（+ 7.5%），而PE增加了土壤根碳（+ 10.0%）；所有聚合物都消耗了土壤全氮（1%时为- 29.5% ~ - 36.9%），并倾向于将无机氮转向硝酸盐积累，特别是PET、PE和PS（+8.3 ~ 12.3%）。随机森林模型显示，根系响应主要与水盐平衡、土壤含水量、电导率、盐度和ph以及无机氮有效性（NO3−-N和NH4+-N）有关，表明关键的土壤条件介导了微塑料对根系性状的影响。我们的研究结果完善了微塑料风险范式：聚合物特异性，而不是剂量本身，主要控制湿地植物的适应性，而生物地球化学功能通过更复杂且通常依赖于剂量的途径响应聚合物特性，需要聚合物特异性管理框架来保护这些重要的生态系统。

{"title":"Polymer type more strongly than concentration drives root responses to microplastics: root biomass–efficiency trade-offs and biogeochemical risks in coastal wetlands","authors":"Pengcheng Jiang , Jingwen Gao , Xiaofei Ye , Ming Wu , Xuexin Shao , Niu Li","doi":"10.1016/j.envpol.2025.127603","DOIUrl":"10.1016/j.envpol.2025.127603","url":null,"abstract":"<div><div>Coastal wetlands, critical for global carbon sequestration and nitrogen removal, face escalating threats from microplastics (MPs) pollution. Yet, whether MPs effects are governed primarily by concentration or polymer type remains unresolved, impeding risk assessment accuracy. Here, through a mesocosm experiment with <em>Scirpus mariqueter</em>, we demonstrate that polymer type more strongly than concentration shapes root morphological and stoichiometric responses to four globally prevalent MP polymers (PP, PET, PS, PE), whereas effects on soil biogeochemistry are more complex and often interactive with concentration. MPs induced a morphological coping strategy characterized by a biomass–efficiency trade-off in roots: despite significant reductions in root biomass (−22.4 % to −35.0 %) and root-to-shoot ratio (−11.1 % to −36.1 %), plants dramatically increased root efficiency traits, including root length (+31.3–43.7 %), root surface area (+30.3 %), specific root length (+67.6–186 %), and specific root surface area (+79.8 %). Concurrently, root nitrogen (−13.5–29.7 %) and phosphorus (−35.9 %) contents declined, elevating C:N (up to +35.8 %) and C:P ratios (up to +105.3 %). Crucially, microplastic polymer types generated antagonistic soil effects: PP elevated soil total carbon (+7.5 %), whereas PE amplified root carbon (+10.0 %); all polymers depleted soil total nitrogen (−29.5 to −36.9 % at 1 %) and tended to shift inorganic N toward nitrate accumulation, particularly under PET, PE, and PS (+8.3−12.3 %). Random forest models showed that root responses were primarily associated with the water–salt balance—soil water content, electrical conductivity, salinity, and pH—and with inorganic nitrogen availability (NO<sub>3</sub><sup>−</sup>-N and NH<sub>4</sub><sup>+</sup>-N), indicating that key edaphic conditions mediate the effects of microplastics on root traits. Our findings refine microplastic risk paradigms: polymer specificity, rather than dosage alone, primarily controls wetland plant adaptation, while biogeochemical functions respond to polymer identity through more complex and often dose-dependent pathways, demanding polymer-specific management frameworks for preserving these vital ecosystems.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"392 ","pages":"Article 127603"},"PeriodicalIF":7.3,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-term localization experiments reveal aging degradation mechanisms of biobased and petroleum-based polyurethanes in natural environments: degradation characteristics, product assessment and degradation cycle prediction 长期的局部化实验揭示了生物基和石油基聚氨酯在自然环境中的老化降解机制：降解特性、产物评价和降解周期预测。

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-26 DOI: 10.1016/j.envpol.2025.127604

Hongyu Tian , Qi Chen , Zhiguang Liu , Min Zhang , Soroush Abolfathi , Andrew J. Tanentzap

The widespread use of polymer-coated controlled release fertilizers has raised concerns, as it may become a new source of microplastic pollution in the environment. However, there is limited knowledge on the transport and fate of different types of polyurethane in soil. We conducted a 807-day field experiment to compare the degradation characteristics of conventional polyester polyurethane (PPU) coatings with novel, biobased coatings from liquefied starch-based polyurethane (SPU) and castor oil polyurethane (CPU). The biobased coating SPU degraded 2.2 times faster than the petroleum-based PPU. After degradation, biobased coatings exhibited a more porous microstructure, higher concentrations of oxygen and dissolved organic matter, more oxygen-containing functional groups, and higher degrees of fragmentation, consistent with greater aging. It is estimated that the starch-based polyurethane coating would take approximately 75 years to degrade by 90 % in deeply buried soil, which is significantly faster than its petroleum-based counterpart (163 years), highlighting the importance of shifting toward biobased products that degrade more quickly. Biobased coatings also produced fewer toxic byproducts in soil than petroleum-based PPU products. These results clarify the degradation processes of polyurethane coatings and improve our understanding of the fate of polyurethane microplastics in soils.

聚合物包膜控释肥料的广泛使用引起了人们的关注，因为它可能成为环境中微塑料污染的新来源。然而，对不同类型的聚氨酯在土壤中的运输和命运的了解有限。我们进行了为期807天的现场实验，比较了传统聚酯聚氨酯（PPU）涂料与新型生物基液化淀粉基聚氨酯（SPU）和植物油聚氨酯（CPU）涂料的降解特性。生物基涂层SPU的降解速度是石油基PPU的2.2倍。降解后，生物基涂层的微观结构更多孔，氧和溶解有机物浓度更高，含氧官能团更多，破碎程度更高，与老化程度越高一致。据估计，淀粉基聚氨酯涂料在深埋土壤中降解90%需要大约75年的时间，这比石油基涂料（163年）要快得多，这凸显了转向降解速度更快的生物基产品的重要性。与石油基PPU产品相比，生物基涂料在土壤中产生的有毒副产物也更少。这些结果阐明了聚氨酯涂料的降解过程，提高了我们对聚氨酯微塑料在土壤中的命运的理解。

{"title":"Long-term localization experiments reveal aging degradation mechanisms of biobased and petroleum-based polyurethanes in natural environments: degradation characteristics, product assessment and degradation cycle prediction","authors":"Hongyu Tian , Qi Chen , Zhiguang Liu , Min Zhang , Soroush Abolfathi , Andrew J. Tanentzap","doi":"10.1016/j.envpol.2025.127604","DOIUrl":"10.1016/j.envpol.2025.127604","url":null,"abstract":"<div><div>The widespread use of polymer-coated controlled release fertilizers has raised concerns, as it may become a new source of microplastic pollution in the environment. However, there is limited knowledge on the transport and fate of different types of polyurethane in soil. We conducted a 807-day field experiment to compare the degradation characteristics of conventional polyester polyurethane (PPU) coatings with novel, biobased coatings from liquefied starch-based polyurethane (SPU) and castor oil polyurethane (CPU). The biobased coating SPU degraded 2.2 times faster than the petroleum-based PPU. After degradation, biobased coatings exhibited a more porous microstructure, higher concentrations of oxygen and dissolved organic matter, more oxygen-containing functional groups, and higher degrees of fragmentation, consistent with greater aging. It is estimated that the starch-based polyurethane coating would take approximately 75 years to degrade by 90 % in deeply buried soil, which is significantly faster than its petroleum-based counterpart (163 years), highlighting the importance of shifting toward biobased products that degrade more quickly. Biobased coatings also produced fewer toxic byproducts in soil than petroleum-based PPU products. These results clarify the degradation processes of polyurethane coatings and improve our understanding of the fate of polyurethane microplastics in soils.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127604"},"PeriodicalIF":7.3,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145848526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupled hydrochemical–microbial approach to groundwater pollution in covered and exposed karst systems 覆盖和暴露岩溶系统地下水污染的水化学-微生物耦合研究

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-25 DOI: 10.1016/j.envpol.2025.127586

Geng Yang , Qinglong Song , Xingtao Wang , Qingnan Yue , Yi Chen , Hui Ma , You Wu , Chenglong Yu , Shengyan Pu

Karst aquifers are highly vulnerable to anthropogenic contamination due to their rapid flow dynamics and limited self-purification capacity. However, the mechanisms controlling pollutant transport in different karst settings remain insufficiently understood. This study conducts a comparative investigation of groundwater pollution transport in a covered karst system (Wuming Karst Basin, WKB) and an exposed karst system (northwestern Guangxi Karst Area, NGKA) in southern China. By integrating hydrochemical analysis with microbial 16S rRNA sequencing, and applying a dual-source tracking framework combining Positive Matrix Factorization (PMF) and the Bayesian-based Sourcetracker model, this work systematically characterizes pollution sources and their co-migration behavior in distinct geomorphic contexts. Results show that groundwater in both systems is dominated by Ca–HCO₃ hydrochemistry controlled by carbonate weathering, but exhibits distinct anthropogenic signatures. In WKB, pollution is primarily attributed to domestic sewage, with PMF identifying Na⁺ and K⁺ enrichment and Sourcetracker revealing a dominant microbial contribution of 60.44 %. In contrast, NGKA displays multi-source pollution dominated by agriculture (41.34 %), with rapid pollutant infiltration facilitated by exposed karst conduits. Notably, both systems exhibit significant contributions from uncharacterized sources (WKB: 37.36 %; NGKA: 14.37 %), underscoring the limitations of current source apportionment methods. This study is the first to integrate chemical and microbial tracers in a comparative karst setting, providing new insights into the coupled transport mechanisms of ions and microbes. The proposed framework offers a robust foundation for targeted pollution mitigation and groundwater protection strategies in vulnerable karst environments.

喀斯特含水层由于其快速的流动动力学和有限的自净化能力，极易受到人为污染。然而，对不同岩溶环境下污染物运移的控制机制仍知之甚少。本文对中国南方覆盖型岩溶系统（武明岩溶盆地，WKB）和暴露型岩溶系统（桂西北岩溶区，NGKA）地下水污染运移进行了对比研究。通过将水化学分析与微生物16S rRNA测序相结合，并应用结合正矩阵分解（PMF）和基于贝叶斯的Sourcetracker模型的双源跟踪框架，本研究系统地表征了不同地貌背景下的污染源及其共迁移行为。结果表明，两体系地下水均以碳酸盐风化控制的Ca-HCO3水化学为主，但具有明显的人为特征。在WKB中，污染主要归因于生活污水，PMF识别Na+和K+富集，Sourcetracker显示优势微生物贡献为60.44%。NGKA以农业污染为主（41.34%），暴露的岩溶管道促进了污染物的快速渗透。值得注意的是，这两个系统都显示出未表征源的显著贡献（WKB: 37.36%; NGKA: 14.37%），强调了当前源分配方法的局限性。这项研究首次将化学和微生物示踪剂结合在喀斯特环境中，为离子和微生物的耦合传输机制提供了新的见解。提出的框架为脆弱喀斯特环境中有针对性的污染缓解和地下水保护战略提供了坚实的基础。

{"title":"Coupled hydrochemical–microbial approach to groundwater pollution in covered and exposed karst systems","authors":"Geng Yang , Qinglong Song , Xingtao Wang , Qingnan Yue , Yi Chen , Hui Ma , You Wu , Chenglong Yu , Shengyan Pu","doi":"10.1016/j.envpol.2025.127586","DOIUrl":"10.1016/j.envpol.2025.127586","url":null,"abstract":"<div><div>Karst aquifers are highly vulnerable to anthropogenic contamination due to their rapid flow dynamics and limited self-purification capacity. However, the mechanisms controlling pollutant transport in different karst settings remain insufficiently understood. This study conducts a comparative investigation of groundwater pollution transport in a covered karst system (Wuming Karst Basin, WKB) and an exposed karst system (northwestern Guangxi Karst Area, NGKA) in southern China. By integrating hydrochemical analysis with microbial 16S rRNA sequencing, and applying a dual-source tracking framework combining Positive Matrix Factorization (PMF) and the Bayesian-based Sourcetracker model, this work systematically characterizes pollution sources and their co-migration behavior in distinct geomorphic contexts. Results show that groundwater in both systems is dominated by Ca–HCO<sub>3</sub> hydrochemistry controlled by carbonate weathering, but exhibits distinct anthropogenic signatures. In WKB, pollution is primarily attributed to domestic sewage, with PMF identifying Na<sup>+</sup> and K<sup>+</sup> enrichment and Sourcetracker revealing a dominant microbial contribution of 60.44 %. In contrast, NGKA displays multi-source pollution dominated by agriculture (41.34 %), with rapid pollutant infiltration facilitated by exposed karst conduits. Notably, both systems exhibit significant contributions from uncharacterized sources (WKB: 37.36 %; NGKA: 14.37 %), underscoring the limitations of current source apportionment methods. This study is the first to integrate chemical and microbial tracers in a comparative karst setting, providing new insights into the coupled transport mechanisms of ions and microbes. The proposed framework offers a robust foundation for targeted pollution mitigation and groundwater protection strategies in vulnerable karst environments.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127586"},"PeriodicalIF":7.3,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145846206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial disparities and environmental justice in PM2.5 exposure among urban E-bike Commuters:A case study of Changsha 城市电动自行车通勤者PM2.5暴露的空间差异与环境公平——以长沙市为例

IF 7.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-12-25 DOI: 10.1016/j.envpol.2025.127602

Xin Li , Tao Yang , Zhongwu Li , Zhiyong Long , Jie Liang , Ziqian Zhu , Jing Tong

Amid increasing residential segregation, disparities in resource allocation and environmental health faced by vulnerable groups have drawn widespread attention. Electric bicycles (E-bikes), favored by low-income populations due to their affordability, convenience, and eco-friendliness, have gained widespread popularity, particularly in China. However, whether E-bikes can reduce daily air pollution exposure and mitigate associated environmental health inequalities remains unclear. This study integrates land use regression and space syntax to quantify spatial disparities in PM_2.5 exposure among E-bike commuters in Changsha, China. Results show that by broadening route options, E-bikes reduced the exposure difference between behavior-based and fast routes to 4.2 % (0.32 μg) within a 15-min commuting isochrone, down from 7.5 % (0.9 μg) for walking. Yet structural disparities persist, over 30 % of high-exposure clusters are concentrated in gated-community-dominated new towns, and low-income neighborhoods exhibit stronger exposure-built environment correlations (Pearson's |r| = 0.32–0.51, p < 0.01). Inadequate infrastructure (e.g., roads, green space) in these areas limits health benefits from route optimization. Moreover, about 50 % of low-income commuters exhibit significantly higher exposure increments than other groups under equivalent additional time costs when selecting behavior-based routes, suggesting greater potential health gains could be achieved if they adopt low-exposure routes. We propose tailored interventions, such as prioritizing built-environment upgrades in disadvantaged communities and deploying real-time exposure-aware navigation. Methodologically, our dynamic simulation of socioeconomic heterogeneity and actual route choices advances the assessment of exposure, offering a targeted framework for environmental health governance in high-density cities.

随着居住隔离加剧，弱势群体在资源分配和环境卫生方面的差异引起了广泛关注。电动自行车（E-bikes）因其可负担性、便利性和环保性而受到低收入人群的青睐，已经得到了广泛的普及，尤其是在中国。然而，电动自行车是否能减少日常空气污染暴露并缓解相关的环境健康不平等仍不清楚。本研究结合土地利用回归和空间句法，量化了长沙市电动自行车通勤者PM2.5暴露的空间差异。结果表明，通过拓宽路线选择，电动自行车将行为路线和快速路线在15分钟通勤等时线内的暴露差异降低至4.2% (0.32 μg)，低于步行路线的7.5% （0.9 μg）。然而，结构性差异仍然存在，超过30%的高暴露集群集中在以大门社区为主的新镇，低收入社区表现出更强的暴露与建成环境的相关性（Pearson's | = 0.32-0.51, p < 0.01）。这些地区基础设施不足（如道路、绿地）限制了路线优化带来的健康效益。此外，在选择基于行为的路线时，约50%的低收入通勤者在同等额外时间成本下表现出明显高于其他群体的暴露增量，这表明如果他们采用低暴露路线，可能获得更大的潜在健康收益。我们提出了量身定制的干预措施，例如优先考虑弱势社区的建筑环境升级和部署实时暴露感知导航。在方法上，我们对社会经济异质性和实际路线选择的动态模拟推进了暴露评估，为高密度城市的环境卫生治理提供了有针对性的框架。

{"title":"Spatial disparities and environmental justice in PM2.5 exposure among urban E-bike Commuters:A case study of Changsha","authors":"Xin Li , Tao Yang , Zhongwu Li , Zhiyong Long , Jie Liang , Ziqian Zhu , Jing Tong","doi":"10.1016/j.envpol.2025.127602","DOIUrl":"10.1016/j.envpol.2025.127602","url":null,"abstract":"<div><div>Amid increasing residential segregation, disparities in resource allocation and environmental health faced by vulnerable groups have drawn widespread attention. Electric bicycles (E-bikes), favored by low-income populations due to their affordability, convenience, and eco-friendliness, have gained widespread popularity, particularly in China. However, whether E-bikes can reduce daily air pollution exposure and mitigate associated environmental health inequalities remains unclear. This study integrates land use regression and space syntax to quantify spatial disparities in PM<sub>2.5</sub> exposure among E-bike commuters in Changsha, China. Results show that by broadening route options, E-bikes reduced the exposure difference between behavior-based and fast routes to 4.2 % (0.32 μg) within a 15-min commuting isochrone, down from 7.5 % (0.9 μg) for walking. Yet structural disparities persist, over 30 % of high-exposure clusters are concentrated in gated-community-dominated new towns, and low-income neighborhoods exhibit stronger exposure-built environment correlations (Pearson's |r| = 0.32–0.51, p < 0.01). Inadequate infrastructure (e.g., roads, green space) in these areas limits health benefits from route optimization. Moreover, about 50 % of low-income commuters exhibit significantly higher exposure increments than other groups under equivalent additional time costs when selecting behavior-based routes, suggesting greater potential health gains could be achieved if they adopt low-exposure routes. We propose tailored interventions, such as prioritizing built-environment upgrades in disadvantaged communities and deploying real-time exposure-aware navigation. Methodologically, our dynamic simulation of socioeconomic heterogeneity and actual route choices advances the assessment of exposure, offering a targeted framework for environmental health governance in high-density cities.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"391 ","pages":"Article 127602"},"PeriodicalIF":7.3,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0