Emerging Contaminants最新文献_第8页

Assessing contamination and risk profiles of per- and polyfluoroalkyl substances across various types of water in South Africa: trends over the past decade (2014–2024) 评估南非各类水中全氟烷基和多氟烷基物质的污染和风险概况：过去十年的趋势（2014-2024年）

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-06-11 DOI: 10.1016/j.emcon.2025.100535

Nhlanhla Hlongwa , Victor Parry , Kevin Winter , David Ikumi , Amber Abrams , Kirsty Carden

This study investigates the occurrence, spatial distribution, and ecological and human health risks of per- and polyfluoroalkyl substances (PFAS) in South African water systems over the period 2014–2024. In the absence of direct drinking water data, ecological risk assessments and indirect human exposure evaluations via potential crop irrigation were conducted using PFAS concentrations measured in surface water and wastewater across four regional zones: north (Gauteng, Limpopo, Mpumalanga, Northwest), west (Northern Cape), east (KwaZulu-Natal, Free State), and south (Eastern and Western Cape). Among the compounds analysed, perfluorooctanoic acid (PFOA) was the most prevalent, with concentrations ranging from 315 ng/L in the Eastern Cape to 420 ng/L in the Vaal River (Gauteng), yielding ecological risk quotient (RQ) values of 3.15 and 4.05, respectively, both exceeding the RQ safety threshold of 1. Perfluoro butanoic acid (PFBA) and perfluoro hexanoic acid (PFHxA) also presented moderate ecological risks, with peak concentrations of 380 ng/L (west) and 267 ng/L (north), corresponding to RQ values of 1.10–1.78. The north zone, particularly sites like the Vaal River and Hartbeespoort Dam, exhibited the highest PFAS burden. A strong correlation (r = 0.95) between PFOA and PFHxA suggests common sources of contamination. Spatial variability was more pronounced for PFHxA (CV = 12.84 %) than for PFOA (CV = 9.92 %). Indirect human health risks from crop ingestion were negligible, with hazard quotient (HQ) values below 0.019 and incremental lifetime cancer risk (ILCR) estimates below 2.70 × 10⁻⁸. Despite minimal human health risks, the persistent ecological threats particularly in the north zone underscore the need for enhanced regulatory oversight, long-term monitoring, and targeted PFAS treatment strategies.

本研究调查了2014-2024年期间南非水系统中全氟烷基和多氟烷基物质（PFAS）的发生、空间分布以及生态和人类健康风险。在缺乏直接饮用水数据的情况下，通过潜在作物灌溉进行了生态风险评估和间接人类暴露评估，使用了四个区域的地表水和废水中的PFAS浓度测量：北部（豪登省、林波波省、姆普马兰加省、西北部）、西部（北开普省）、东部（夸祖鲁-纳塔尔省、自由邦）和南部（东开普省和西开普省）。在所分析的化合物中，全氟辛酸（PFOA）最为普遍，浓度范围从东开普省的315纳克/升到瓦尔河（豪登省）的420纳克/升不等，其生态风险商（RQ）值分别为3.15和4.05，均超过RQ安全阈值1。全氟丁酸（PFBA）和全氟己酸（PFHxA）也具有中等生态风险，峰值浓度分别为380 ng/L（西部）和267 ng/L（北部），对应的RQ值为1.10-1.78。北部地区，特别是瓦尔河和哈特比斯波特大坝等地点，显示出最高的PFAS负担。PFOA和PFHxA之间有很强的相关性（r = 0.95），表明它们有共同的污染源。PFHxA （CV = 12.84%）比PFOA （CV = 9.92%）的空间变异更为明显。食用农作物对人类健康的间接风险可以忽略不计，危害商（HQ）值低于0.019，增量终身癌症风险（ILCR）估计低于2.70 × 10−8。尽管人类健康风险很小，但持续存在的生态威胁，特别是在北部地区，突出表明需要加强管理监督、长期监测和有针对性的PFAS治疗战略。

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引用次数: 0

Occurrence, bioaccumulation, and ecological risk assessment of contaminants of emerging concern using native and invasive species as biomonitors 使用本地和入侵物种作为生物监测仪的新兴关注污染物的发生，生物积累和生态风险评估

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-06-09 DOI: 10.1016/j.emcon.2025.100533

Diana P. Manjarrés-López , Claudia Martínez-Megías , Dyana Vitale , Yolanda Picó , Andreu Rico , Sandra Pérez

Traditionally, contaminants of emerging concern (CECs) monitoring have focused on assessing their occurrence in abiotic compartments and in native fish species. The use of non-native species in environmental quality studies has recently proven to be a key tool for evaluating the CECs exposure and their ecological risks. In this study, the use of different native and invasive species was proposed to assess the environmental quality of a coastal Mediterranean wetland. A biomonitoring assessment was conducted at ten locations within the Albufera Natural Park (Spain), including irrigation channels, the lake, and the artificial wetland. The bioaccumulation of 171 CECs was evaluated in the Asian clam, the American red swamp crayfish, and the pumpkinseed sunfish, which are primary invasive species in this ecosystem. Furthermore, a comparative analysis was done with the native clam to verify whether invasive species could provide equivalent information. A total of 35 CECs were detected in at least one of the species analyzed. The Asian clam exhibited the highest number of detected compounds (23), as well as the highest chemical concentrations, particularly for pharmaceuticals. The ecological risk assessment performed with internal concentrations of CECs also pointed at the Asian clam as the most suitable species for chemical biomonitoring in this area. The compounds that had the highest contribution to the calculated ecological risk were sertraline, fluoxetine, terbuthylazine, caffeine, and oseltamivir. At most exposure sites HI values revealed high risk, indicating strong pressure from mixtures of CEs for both native and invasive species. This study shows that the analysis of chemical concentrations in invasive species can be considered a complementary tool to determine the ecological status of coastal wetlands.

传统上，监测新出现的关注污染物（CECs）的重点是评估它们在非生物隔间和本地鱼类中的发生情况。近年来，在环境质量研究中使用非本地物种已被证明是评估CECs暴露及其生态风险的关键工具。本研究提出利用不同的本地和入侵物种来评估地中海沿岸湿地的环境质量。在Albufera自然公园（西班牙）内的10个地点进行了生物监测评估，包括灌溉渠、湖泊和人工湿地。在该生态系统的主要入侵物种亚洲蛤、美洲红沼泽小龙虾和南瓜子太阳鱼中对171种CECs的生物积累进行了评价。此外，还与本地蛤蜊进行了比较分析，以验证入侵物种是否可以提供相同的信息。在至少一种被分析的物种中共检测到35个CECs。亚洲蛤显示出最多的检测到的化合物（23），以及最高的化学浓度，特别是药物。利用CECs内部浓度进行的生态风险评估也指出亚洲蛤是该地区最适合进行化学生物监测的物种。对计算生态风险贡献最大的化合物是舍曲林、氟西汀、特丁嗪、咖啡因和奥司他韦。在大多数暴露点，HI值显示高风险，表明来自本地和入侵物种的ce混合物的强大压力。本研究表明，入侵物种的化学物质浓度分析可以被认为是确定滨海湿地生态状况的补充工具。

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引用次数: 0

Conjugation effects on antibiotic resistance genes at various salt Levels: Insights from single-factor and simulation study 不同盐水平下抗生素耐药基因的偶联效应：单因素和模拟研究的见解

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-27 DOI: 10.1016/j.emcon.2025.100522

Pei Jiang , Yu Xia , Jiali Chang , Cheng Zhang , Xia Li , Le Fang , Xinhui Liu

The dissemination mechanisms of antibiotic resistance genes (ARGs) under salinity fluctuations remain poorly understood, despite their critical implications for environmental resistance ecology. This study systematically decoupled salinity-driven conjugation dynamics through controlled single-factor experiments and simulated sediment microcosms. Controlled conjugation assays revealed a threshold-dependent response, with RP4 plasmid transfer frequencies peaking at 2.00 % salinity (4.58–13.51-fold increase vs. 0.85 % control, p < 0.01), mechanistically linked to reactive oxygen species (ROS)-mediated SOS pathway activation. In simulated sediment systems, salinity gradients drove host-specific ARGs enrichment, with plasmid-borne tetA and blaTEM abundances increasing 1.49–4.39 fold under brackish conditions (2.00 % salinity). Multidrug resistance genes floR, qacH-01 exhibited synergistic diffusion patterns (r = 0.77–0.94, p < 0.05), while salt-tolerant phyla Campylobacterota and Spirochaetota became dominant ARGs reservoirs at 3.50 % salinity (2.05–3.17 fold enrichment vs. controls). Although exogenous antibiotic resistance bacteria (ARB) introduction marginally reduced α-diversity, phylum-level community structure remained stable. Salinity preferentially suppressed rare taxa, amplifying ARGs co-occurrence networks through niche restructuring. These findings establish salinity as a dual regulator of ARGs dissemination, directly enhancing conjugation via oxidative stress pathways and indirectly reshaping resistance landscapes through microbial host selection. The results underscore the necessity of integrating salinity gradients into ARGs risk assessments, particularly in coastal ecosystems where tidal fluctuations may potentiate resistance propagation.

抗生素耐药基因（ARGs）在盐度波动下的传播机制仍然知之甚少，尽管它们对环境抗性生态学具有重要意义。本研究通过受控的单因素实验和模拟沉积物微观环境，系统地解耦了盐度驱动的共轭动力学。对照偶联实验显示了阈值依赖性的响应，在盐度为2.00 %时，RP4质粒转移频率达到峰值(比0.85%的对照增加4.58 - 13.51倍，p <；0.01)，与活性氧（ROS）介导的SOS通路激活机制相关。在模拟沉积物系统中，盐度梯度驱动宿主特异性ARGs富集，在微咸条件下（盐度为2.00%），质粒携带的tetA和blaTEM丰度增加了1.49-4.39倍。多药耐药基因floR、qacH-01呈现协同扩散模式(r = 0.77 ~ 0.94, p <；盐度为3.50%时，弯曲菌门和螺旋藻门成为ARGs的优势储层（富集程度为对照的2.05-3.17倍）。虽然外源抗生素耐药菌（ARB）的引入略微降低了α-多样性，但门水平的群落结构保持稳定。盐度优先抑制稀有类群，通过生态位重构放大ARGs共现网络。这些发现表明盐度是ARGs传播的双重调节因子，通过氧化应激途径直接增强结合，并通过微生物宿主选择间接重塑抗性景观。结果强调了将盐度梯度纳入ARGs风险评估的必要性，特别是在潮汐波动可能加剧抗性传播的沿海生态系统中。

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引用次数: 0

Investigation and risk assessment of PCDDs, PCDFs, and dl-PCBs in Chinese mitten crab (Eriocheir sinensis) from the South Dongting lake area, China 南洞庭湖区中华绒螯蟹中pcdd、pcdf和dl-PCBs的调查与风险评价

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-23 DOI: 10.1016/j.emcon.2025.100521

Wei Xiang , Fuhua Fu , Xuebo Shang , Jian Xu , Fengxiang Yu , Dengni Lai , Yang Shan

Dioxins are among the common persistent organic pollutants in crabs. To clarify the potential risk of dioxins pollution in Chinese mitten crab, eight types of samples were collected in the South Dongting Lake area for the analysis of 17 PCDD/Fs and 12 dl-PCBs. The results indicate that the concentration of Σ PCDD/Fs and Σ dl-PCBs in crabs was between 0.993–10.8 and 35.0–282 pg/g w.w., respectively. The mean WHO-TEQ value of Σ PCDD/Fs in crabs was 0.248 ± 0.205 pg TEQ/g w.w., and the mean WHO-TEQ value of Σ PCDD/Fs + dl-PCBs in crabs was 0.359 ± 0.280 pg TEQ/g w.w. The total toxic equivalent of bottom sediment, surrounding soil, crab brown meat and juvenile crab were relatively high, which were 2.88, 2.67, 1.50 and 1.30 pg TEQ/g w.w., respectively. In the case of 99th percentile, the WHO-TEQ values of Σ PCDD/Fs and Σ PCDD/Fs + dl-PCBs in crab white meat were all within the maximum permitted levels as specified in commission regulation (EU) 2023/915. The HQ values of 99th percentile of Σ PCDD/Fs + dl-PCBs were 0.0783, 0.00703 and 0.0853 for eating brown meat products, eating white meat products and eating whole crabs, respectively. The coordinate points of the samples are connected to the origin by a straight line in the correspondence analysis map. The angle formed by the straight lines of crab brown meat/crab white meat and juvenile crab was acute angle, as did the feed. The angles between the straight line of bottom sediment/surrounding soil and that of other samples were all obtuse angles. In conclusion, although the dioxins of bottom sediment and surrounding soil are obvious, the dioxins of adult crabs are mainly related to that of the juvenile crabs and feed. At present, the intake of dioxins from Chinese mitten crab by Chinese residents is at a safe level because of low annual consumption. It is recommended that adults limit their weekly crab consumption to 1–4 crabs, or only 23.1–105 g of crab brown meat per week, or solely 435–1242 g of crab white meat per week.

二恶英是螃蟹体内常见的持久性有机污染物之一。为明确中华绒螯蟹二恶英污染的潜在风险，在南洞庭湖区采集了8种样品，对17种PCDD/Fs和12种dl-PCBs进行了分析。结果表明：鲎体内Σ PCDD/Fs和Σ dl-PCBs浓度分别为0.993 ~ 10.8和35.0 ~ 282 pg/g w.w.；蟹类中Σ PCDD/Fs的WHO-TEQ平均值为0.248±0.205 pg TEQ/g w.w， Σ PCDD/Fs + dl-PCBs的WHO-TEQ平均值为0.359±0.280 pg TEQ/g w.w，底泥、周围土壤、蟹棕肉和蟹幼肉的总毒性当量较高，分别为2.88、2.67、1.50和1.30 pg TEQ/g w.w。螃蟹白肉中Σ PCDD/Fs和Σ PCDD/Fs + dl-PCBs的WHO-TEQ值均在欧盟法规（EU） 2023/915规定的最大允许水平内。食用红肉制品、食用白肉制品和食用整蟹的Σ PCDD/Fs + dl-PCBs的第99百分位HQ值分别为0.0783、0.00703和0.0853。在对应分析图中，样品的坐标点通过一条直线与原点相连。蟹棕肉/蟹白肉与幼蟹直线形成的夹角为锐角，饵料也为锐角。底部沉积物/周围土壤的直线与其他样品的直线夹角均为钝角。综上所述，虽然底部沉积物和周围土壤的二恶英含量明显，但成体蟹的二恶英主要与幼蟹和饲料有关。目前我国居民从中华绒螯蟹中摄入的二恶英由于年消费量较低，处于安全水平。建议成年人每周只吃1-4只螃蟹，或者每周只吃23.1-105克蟹黄肉，或者每周只吃435-1242克蟹白肉。

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引用次数: 0

Combined impacts of organophosphate pesticide and polyamide microplastics on growth, hematology, and immune responses in juvenile striped catfish (Pangasianodon hypophthalmus) 有机磷农药和聚酰胺微塑料对斑纹鲶鱼幼鱼生长、血液学和免疫反应的联合影响

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-23 DOI: 10.1016/j.emcon.2025.100520

Sheik Istiak Md Shahriar , Naimul Islam , Farhan Jamil Emon , Vaskar Nepal , Saleha Khan , Md Shahjahan

Organophosphate pesticides and microplastics are two major threats to freshwater ecosystems. Individually, their impacts on aquatic animals are well established, but their combined effects remain poorly understood. Yet, in the Anthropocene, multiple pollutants simultaneously affect aquatic organisms, and their combined effects may not be additive. It is therefore important to study the interactive effects of multiple stressors on aquatic animals. This study examined the effects of sub-lethal concentrations of the pesticide fenitrothion (0.60 mg/L) and polyamide microplastics (10 mg/L) on survival, growth, hematology, and immune-gene expression in juvenile striped catfish (Pangasianodon hypophthalmus) over 28 days. Fish were exposed to microplastics (MP), fenitrothion (Fen), both stressors combined (Fen + MP), or neither (control). Co-exposure to fenitrothion and microplastics (Fen + MP) led to increased microplastic accumulation, reduced growth performance (weight gain, specific growth rate, and feed efficiency), lower survival rates, and significant hematological changes, including elevated glucose (143.89 mg/dL) and reduced hemoglobin (7.30 g/dL). Cellular and nuclear abnormalities, such as micronuclei and teardrop-shaped cells, were most pronounced in Fen + MP treatments. Histo-pathological analysis revealed severe tissue damage in gills, liver, kidney, and intestines under co-exposure. Immunologically, Fen + MP upregulated interleukin-1β (IL-1β) expression but downregulated major histocompatibility complex-II (MHC-II) and interferon genes (IFN-α2, IFN-β2). These findings highlight that combined exposure to the chosen pesticides and microplastics exacerbates physiological, cellular, and immune impairments in striped catfish, posing significant risks to their health and survival.

有机磷农药和微塑料是淡水生态系统的两大威胁。单独来看，它们对水生动物的影响已经确定，但它们的综合影响仍然知之甚少。然而，在人类世，多种污染物同时影响水生生物，它们的综合影响可能不是相加的。因此，研究多种应激源对水生动物的交互作用具有重要意义。本研究研究了亚致死浓度杀虫剂杀虫磷（0.60 mg/L）和聚酰胺微塑料（10 mg/L）对斑纹鲶鱼幼鱼28 d内存活、生长、血液学和免疫基因表达的影响。鱼分别暴露于微塑料（MP）、氟硫磷（Fen）、两种压力源组合（Fen + MP）或两者都不暴露（对照组）。共同暴露于氟代磷和微塑料（Fen + MP）会导致微塑料积累增加，生长性能降低（增重、特定生长率和饲料效率），存活率降低，以及显著的血液学变化，包括血糖升高（143.89 mg/dL）和血红蛋白降低（7.30 g/dL）。细胞和细胞核异常，如微核和泪滴状细胞，在Fen + MP治疗中最为明显。组织病理分析显示，在共暴露下，鳃、肝、肾和肠组织严重损伤。在免疫学上，Fen + MP上调白细胞介素-1β (IL-1β)表达，下调主要组织相容性复合体- ii （MHC-II）和干扰素基因（IFN-α2, IFN-β2）。这些发现强调，所选农药和微塑料的联合暴露会加剧条纹鲶鱼的生理、细胞和免疫损伤，对它们的健康和生存构成重大风险。

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引用次数: 0

Polychlorinated naphthalenes in the serum of individuals with thyroid dysfunction and their potential mechanisms of impact on disease progression 甲状腺功能障碍患者血清中多氯萘及其对疾病进展影响的潜在机制

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-23 DOI: 10.1016/j.emcon.2025.100517

Yuhao Fan , Dan Chen , Xinyu Lou , Ye Wu , Jie Sun , Zhiyan Liu , Jun Jin , Tan Chen

Polychlorinated naphthalenes (PCNs) comprise 75 congeners, with varying concentrations and major congeners across different populations. Recent studies have found a relationship between PCNs and thyroid hormone levels, suggesting they may interfere with thyroid function. Investigating the concentrations of PCNs in individuals with thyroid dysfunction helps identify the predominant congeners and enables targeted analysis of their interference with thyroid function. In this study, serum concentrations of PCNs from 55 adults with thyroid dysfunction were measured. PCN-13, -15, −17/25/26, −20, −23, and −24/14 detected at over 70 %, and PCN-23 and -24/14 being the major congeners. No significant difference in PCN concentrations was found between males and females, but the concentrations of PCN-23 and -24/14 increased with age. Logistic regression and QGC models revealed a significant association between PCN-23 and thyroid dysfunction, while mediation analysis indicated PCN-23 affects physiological processes involving the BRAF 600E gene, which influences normal thyroid function. Molecular docking results showed that all six PCNs impacted thyroid hormone metabolism and receptor binding, with PCN-23 binding more effectively to TBG and disrupting thyroid hormone transport compared to PCN-24/14. Future studies should focus on the concentrations of trichlorinated PCNs, particularly PCN-23, in the human body and their relationship with thyroid function.

多氯萘包括75种同系物，在不同的人群中具有不同的浓度和主要同系物。最近的研究发现pcn与甲状腺激素水平之间的关系，表明它们可能干扰甲状腺功能。研究甲状腺功能障碍患者中pcn的浓度有助于确定主要的同系物，并能够有针对性地分析其对甲状腺功能的干扰。在这项研究中，测量了55名甲状腺功能障碍成人的血清PCNs浓度。PCN-13、-15、- 17/25/26、- 20、-23和-24/14的检出率超过70%，其中PCN-23和-24/14是主要的同源基因。PCN的浓度在雌雄之间无显著差异，但PCN-23和-24/14的浓度随着年龄的增长而增加。Logistic回归和QGC模型显示PCN-23与甲状腺功能障碍之间存在显著相关性，而中介分析表明PCN-23影响BRAF 600E基因的生理过程，从而影响正常的甲状腺功能。分子对接结果显示，6种pcn均影响甲状腺激素代谢和受体结合，与PCN-24/14相比，PCN-23更有效地结合TBG并破坏甲状腺激素运输。今后的研究应重点关注三氯pcn，特别是PCN-23在人体内的浓度及其与甲状腺功能的关系。

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引用次数: 0

The effect of tire microplastics on aerobic granular sludge performance 轮胎微塑料对好氧颗粒污泥性能的影响

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-22 DOI: 10.1016/j.emcon.2025.100513

Job Oliver Otieno , Piotr Jachimowicz , Magdalena Zielińska , Weronika Irena Mądzielewska , Agnieszka Cydzik-Kwiatkowska

Although tire microplastics (TMPs) constitute a substantial portion of microplastic entering wastewater treatment plants, there is a knowledge gap regarding the influence of TMPs on aerobic granular sludge (AGS) systems, which, being more resilient than activated sludge, are becoming increasingly important in modern wastewater treatment. This study investigated the effect of TMPs in wastewater (50, 100, 250, and 500 mg/L) on AGS performance and microbiome. TMPs did not affect organics and phosphorus removal, however, total nitrogen removal was significantly higher (about 9 %) at 500 mg TMPs/L compared to the control. TMPs improved biomass settling, but this was due to TMP accumulation (TMPs comprised over 50 % of biomass at 500 mg TMP/L) rather than improved granulation. The biomass yield coefficient was five times lower at 500 mg TMP/L than in the control. TMPs elevated dehydrogenase activity (free radical generation) and increased the abundance of microbes involved in polyP synthesis and nitrogen metabolism. TMP presence increased the microbiome potential in terms of antibiotic resistance genes (cmd and marR) and the abundance of hydrolases, which degrade rubber-associated ester bonds, and significantly increased the abundance of MP-degraders belonging to genera Ideonella, Rhodobacter, Xanthobacter, and Hydrogenophaga. This study demonstrates that while TMPs in wastewater do not impair nutrient removal by AGS, their accumulation significantly degrades biomass properties, complicating sludge management and disposal. Furthermore, TMPs alter the AGS microbiome's composition and metabolic potential. These findings highlight the importance of integrating AGS systems into urban wastewater treatment, optimizing sludge management strategies, and developing targeted approaches to address the challenges posed by TMPs.

尽管轮胎微塑料（TMPs）构成了进入污水处理厂的微塑料的很大一部分，但关于TMPs对好氧颗粒污泥（AGS）系统的影响，人们还存在知识缺口，而好氧颗粒污泥（AGS）系统比活性污泥更具弹性，在现代废水处理中越来越重要。本研究考察了50、100、250和500 mg/L废水中TMPs对AGS性能和微生物组的影响。在500 mg TMPs/L时，总氮去除率显著高于对照组（约9%）。TMPs改善了生物质沉降，但这是由于TMP积累（在500mg TMP/L时，TMPs占生物量的50%以上），而不是改善了造粒。500mg TMP/L处理的生物量产量系数比对照降低了5倍。TMPs提高脱氢酶活性（自由基生成），增加参与polyP合成和氮代谢的微生物丰度。TMP的存在增加了微生物组的抗生素抗性基因（cmd和marR）和水解酶的丰度，水解酶可降解橡胶相关的酯键，并显著增加了Ideonella属、Rhodobacter属、Xanthobacter属和Hydrogenophaga属的mp降解物的丰度。该研究表明，虽然废水中的TMPs不会影响AGS对营养物质的去除，但它们的积累会显著降低生物质特性，使污泥管理和处置复杂化。此外，TMPs改变了AGS微生物组的组成和代谢潜力。这些发现强调了将AGS系统整合到城市污水处理中、优化污泥管理策略以及制定有针对性的方法来应对TMPs带来的挑战的重要性。

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引用次数: 0

Non-targeted screening and characterization of organic pollutants in wastewater from an industrial park in China 某工业园区废水中有机污染物的非靶向筛选与表征

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-17 DOI: 10.1016/j.emcon.2025.100519

Xu Tan, Shanwei Sun, Song Hou, Linlin Wu, Yangwei Bai, Hongbo Xi, Jian Xu, Changsheng Guo

Industrial parks are significant sources of complex water pollution, making it challenging to trace pollutant origins and ensure water quality. This study established a non-targeted screening workflow and compound persistence, mobility, and toxicity (PMT) assessment method to identify and characterize organic pollutants in wastewater from a chemical industrial park in Central China. Among the 255 compounds identified, some aromatic ketones and phthalate esters raised concerns due to their potential health effects. PMT assessment revealed 2 PMT/vPMT (v = very) compounds, 36 potential PMT/vPMT compounds, and 50 potential PT/vPT or PM/vPM compounds. Exposure-discharge modeling indicated the wastewater treatment plant's limited efficiency in treating the predominantly aromatic pollutants. Traceability analysis identified 23 characteristic pollutants from eight enterprises. This study provides valuable insights for identifying unknown compounds, evaluating industrial wastewater discharge standards, and enabling precise management of water pollution in industrial parks.

工业园区是复杂水污染的重要来源，这使得追踪污染源和确保水质具有挑战性。本研究建立了一种非靶向筛选流程和化合物持久性、迁移性和毒性（PMT）评估方法，以识别和表征华中某化工园区废水中的有机污染物。在鉴定出的255种化合物中，一些芳香酮和邻苯二甲酸酯因其潜在的健康影响而引起关注。PMT鉴定发现2个PMT/vPMT （v = very）化合物，36个潜在PMT/vPMT化合物，50个潜在PT/vPT或PM/vPM化合物。暴露-排放模型表明，污水处理厂在处理主要的芳香族污染物方面效率有限。溯源分析确定了来自8家企业的23种特征污染物。该研究为识别未知化合物、评估工业废水排放标准以及实现工业园区水污染的精确管理提供了有价值的见解。

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引用次数: 0

Influence of aging and colorants on environmental degradation of polyolefins 老化和着色剂对聚烯烃环境降解的影响

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-16 DOI: 10.1016/j.emcon.2025.100516

Vaibhav Budhiraja , Prashant Mani Shandilya , Luka Pavko , John I. Garver , Andrej Kržan

Plastic litter breaks down into microplastics (MPs) and nanoplastics over time, but their environmental lifespan remains largely unknown. Understanding the degradation of plastic litter in the environment remains a fundamental question in MP research. This study highlights the significant role of colorants in the degradation process by analyzing forty-four naturally aged polyethylene (PE) lobster trap tags collected from the marine environment and an old, heavily degraded polypropylene (PP) product. The lobster trap tags, marked with their production year, indicate their time in the marine environment, with the oldest dating back to 1983, while the PP tub, over forty years old, had undergone extensive photodegradation in sunlight. Chemical, thermal, mechanical and surface property analyses revealed that the aging of PE tags is not directly proportional to their environmental degradation. Among the eight different tag colors, blue and green were the least degraded, while red showed the most degradation, emphasizing the influence of colorants. In contrast, the PP sample exhibited severe surface degradation, with significant fragmentation leading to MP formation, while its interior remained relatively intact. These findings underscore the complex interactions between environmental factors and material properties in plastic degradation.

随着时间的推移，塑料垃圾会分解成微塑料（MPs）和纳米塑料，但它们的环境寿命在很大程度上仍然未知。了解塑料垃圾在环境中的降解仍然是塑料垃圾研究的一个基本问题。本研究通过分析从海洋环境中收集的44个自然老化的聚乙烯（PE）龙虾陷阱标签和一个旧的，严重降解的聚丙烯（PP）产品，突出了着色剂在降解过程中的重要作用。捕虾器的标签上标有它们的生产年份，表明它们在海洋环境中的时间，最古老的可以追溯到1983年，而PP桶已有40多年的历史，在阳光下经历了广泛的光降解。化学、热、机械和表面性能分析表明，PE标签的老化与其环境退化不成正比。在8种不同的标签颜色中，蓝色和绿色降解程度最低，而红色降解程度最高，强调了着色剂的影响。相比之下，PP样品表现出严重的表面降解，明显的碎片导致MP的形成，而其内部保持相对完整。这些发现强调了塑料降解过程中环境因素和材料特性之间复杂的相互作用。

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引用次数: 0

Occurrence, accumulation and potential toxicity of parent and halogenated polycyclic aromatic hydrocarbons in pooled serum of people in different age groups from four Chinese cities 中国4个城市不同年龄组人群血清中母体和卤代多环芳烃的存在、积累及潜在毒性

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants

Pub Date : 2025-05-16 DOI: 10.1016/j.emcon.2025.100518

Jiali Han , Junsong Bao , Tianwei Li , Yao Jiang , Yuhao Fan , Junjie Jiang , Jun Jin , Jicheng Hu

Halogenated polycyclic aromatic hydrocarbons (HPAHs) and polycyclic aromatic hydrocarbons (PAHs) were determined in human serum samples pooled by donor age (<20, 20–29, 30–39, 40–49 and ≥ 50 y). The pooled samples were collected from four Chinese cities, Yantai (Shandong Province), Ganzi (Sichuan Province), Huaihua (Hunan Province), and Lingshui (Hainan Province). The concentrations of HPAHs and PAHs were in the range of 4.26–633 ng/g lipid and 249–1642 ng/g lipid from the different cities. Although the levels of HPAHs in blood samples varied among the populations of the four cities, 1,5-dichloroanthracene (1,5-Cl₂Ant) was the predominant contributor to HPAHs in the serum samples, accounting for over 85.7 % of its total concentration. Furthermore, 1,5-Cl₂Ant serum concentrations increased significantly with age. Notably, molecular docking results show that 1,5-Cl₂Ant not only acquires the ability to bind d-AhR PAS-B domain, but also binds at the similar sites as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and benzo[a]pyrene (BaP), suggesting that 1,5-Cl₂Ant, like TCDD and BaP, may cause a wide variety of toxicity via AhR-mediated signaling pathways. The bioaccumulation potential of 1,5-Cl₂Ant in the human body and its associated toxicity observed in this study need special attention.

按供体年龄（20岁、20 - 29岁、30-39岁、40-49岁和≥50岁）分组的人血清样品中测定卤代多环芳烃（HPAHs）和多环芳烃（PAHs）。汇集的样本来自中国4个城市：山东省烟台市、四川省甘孜市、湖南省怀化市和海南省陵水市。各城市的HPAHs和PAHs浓度分别为4.26 ~ 633 ng/g脂质和249 ~ 1642 ng/g脂质。虽然4个城市人群血样中HPAHs的含量存在差异，但1,5-二氯蒽（1,5- cl2ant）是血清样本中HPAHs的主要来源，占总浓度的85.7%以上。此外，1,5- cl2ant血清浓度随年龄的增长而显著升高。值得注意的是，分子对接结果表明，1,5- cl2ant不仅获得了结合d-AhR PAS-B结构域的能力，而且还与2,3,7,8-四氯二苯并-对二恶英（TCDD）和苯并[a]芘（BaP）结合在相似的位点，这表明1,5- cl2ant可能像TCDD和BaP一样，通过ahr介导的信号通路引起多种毒性。本研究观察到的1,5- cl2ant在人体内的生物蓄积潜力及其相关毒性值得特别关注。

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引用次数: 0