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Changing Degrees: a weight-of-evidence scoping review examining the impact of childhood exposures to climate change on educational outcomes 改变学位:证据权重范围审查,研究童年时期暴露于气候变化对教育成果的影响
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-18 DOI: 10.1016/j.envres.2025.121639
Nadav L. Sprague , Sasinya N. Scott , Christina A. Mehranbod , Ashby L. Sachs , Christine C. Ekenga , Andrew G. Rundle , Charles C. Branas , Pam Factor-Litvak
Climate change negatively impacts several dimensions of education (including student achievement, educational infrastructure, school readiness, and other factors). Further, climate change may act as a threat multiplier for existing educational disparities. While theory links climate change to educational disparities, empirical research remains scarce and there is no current weight-of-evidence review examining climate change and education. This weight of evidence scoping review evaluates the current state of evidence assessing the effect of climate change exposures on aspects of education for youth. Studies were categorized and evaluated using the CHANGE (Climate Health ANalysis Grading Evaluation) tool for weight-of-evidence reviews and adaptions of frameworks developed for previous systematic reviews on associations between climate change and education. Thirty-one studies met review criteria and were grouped into five thematic categories based on reported outcomes: Student Learning in the Humanities, Student Learning in Math and Science, Executive Function and Cognition, Attendance and School Closures, and Educational Advancement Milestones. All studies in this review suggest that climate change exposures during childhood negatively impact aspects of education; however, in some instances the mechanisms and ways in which these climate change exposures impacted aspects of education varied by country or geographic setting. The geographic distribution of studies revealed that the United States accounted for the highest number of studies (n = 6), followed by China, India, Nigeria, Cameroon, and South Africa (n = 2 each), with 18 other countries contributing only one study each, highlighting disparities in global research coverage. Twelve of the studies included in this review examined the concept of climate change as a threat multiplier of educational disparities, but no study had it as a primary focus. Future research directions include extending studies beyond traditional test metrics, integrating diverse academic disciplines, exploring a broader array of geographic regions, delving into place-specific nuances, incorporating indigenous and community knowledge, and focusing explicitly on climate change as a threat multiplier for educational disparities.
{"title":"Changing Degrees: a weight-of-evidence scoping review examining the impact of childhood exposures to climate change on educational outcomes","authors":"Nadav L. Sprague ,&nbsp;Sasinya N. Scott ,&nbsp;Christina A. Mehranbod ,&nbsp;Ashby L. Sachs ,&nbsp;Christine C. Ekenga ,&nbsp;Andrew G. Rundle ,&nbsp;Charles C. Branas ,&nbsp;Pam Factor-Litvak","doi":"10.1016/j.envres.2025.121639","DOIUrl":"10.1016/j.envres.2025.121639","url":null,"abstract":"<div><div>Climate change negatively impacts several dimensions of education (including student achievement, educational infrastructure, school readiness, and other factors). Further, climate change may act as a threat multiplier for existing educational disparities. While theory links climate change to educational disparities, empirical research remains scarce and there is no current weight-of-evidence review examining climate change and education. This weight of evidence scoping review evaluates the current state of evidence assessing the effect of climate change exposures on aspects of education for youth. Studies were categorized and evaluated using the CHANGE (Climate Health ANalysis Grading Evaluation) tool for weight-of-evidence reviews and adaptions of frameworks developed for previous systematic reviews on associations between climate change and education. Thirty-one studies met review criteria and were grouped into five thematic categories based on reported outcomes: Student Learning in the Humanities, Student Learning in Math and Science, Executive Function and Cognition, Attendance and School Closures, and Educational Advancement Milestones. All studies in this review suggest that climate change exposures during childhood negatively impact aspects of education; however, in some instances the mechanisms and ways in which these climate change exposures impacted aspects of education varied by country or geographic setting. The geographic distribution of studies revealed that the United States accounted for the highest number of studies (n = 6), followed by China, India, Nigeria, Cameroon, and South Africa (n = 2 each), with 18 other countries contributing only one study each, highlighting disparities in global research coverage. Twelve of the studies included in this review examined the concept of climate change as a threat multiplier of educational disparities, but no study had it as a primary focus. Future research directions include extending studies beyond traditional test metrics, integrating diverse academic disciplines, exploring a broader array of geographic regions, delving into place-specific nuances, incorporating indigenous and community knowledge, and focusing explicitly on climate change as a threat multiplier for educational disparities.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"277 ","pages":"Article 121639"},"PeriodicalIF":7.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864735","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
Childhood exposure to polycyclic aromatic hydrocarbons (PAHs) and cardiometabolic indicators in childhood and adolescence: findings from a cohort study in rural Bangladesh
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-18 DOI: 10.1016/j.envres.2025.121653
Mercedes Trask , Syed Moshfiqur Rahman , Mariza Kampouri , Rubhana Raqib , Eva-Charlotte Ekström , Eero Kajantie , Mohammad Redwanul Islam , Annette M. Krais , Christian Lindh , Anisur Rahman , Maria Kippler

Background

Exposure to polycyclic aromatic hydrocarbons (PAHs) has been associated with cardiovascular diseases in adulthood, but studies examining childhood origins are scarce.

Objective

To examine associations of childhood PAH exposure with cardiometabolic risk indicators in childhood and adolescence along with differences by sex.

Methods

Urinary PAH metabolites [Σ1,2,3-hydroxyphenanthrene (Σ1,2,3-OH Phe), 1-hydroxypyrene (1-OH Pyr), and Σ2,3-hydroxyfluorene (Σ2,3-OH Flu)] were measured in 9-year-olds from the MINIMat cohort in Bangladesh (n = 196), using liquid chromatography with tandem mass spectrometry. Cardiometabolic indicators [lipids, C-reactive protein (CRP), insulin resistance (HOMA2 IR), blood pressure, anthropometry, and a composite cardiometabolic risk score (CMRS)] were assessed at 9 and 15 years. Associations of PAH metabolites (log2-transformed) with cardiometabolic indicators were assessed using multivariable-adjusted linear and logistic regression models.

Results

In all children, urinary 1-OH Pyr (median: 1.6 ng/mL) was positively associated with body mass index z-score at 9 and 15 years, and with triglyceride/high-density lipoprotein (HDL), cholesterol/HDL ratios, waist circumference, CMRS, and CRP at 15 years. After sex stratification, consistent associations were mainly observed in girls, especially with outcomes at age 15, where both urinary 1-OH Pyr and Σ1,2,3-OH Phe concentrations were inversely associated with HDL, and positively associated with the cholesterol/HDL ratio and CMRS. Urinary 1-OH Pyr was also positively associated with girls’ triglyceride/HDL ratio, HOMA2 IR, waist circumference, and CRP.

Conclusions

Our associations of childhood PAH exposure with cardiometabolic indicators in childhood and adolescence differed by sex. In girls, increased adiposity, indications of altered lipid profile and metabolic function were detected while boys seemed incongruently affected.
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引用次数: 0
Interfacial charge transfer mediated by bridging and terminal hydroxyls on the (001) and (101) facets of TiO2 in the photocatalytic degradation of toluene
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-18 DOI: 10.1016/j.envres.2025.121649
Jinze Lyu , Yaxin Zhao , Ziyi Zhong , Ting Zhang , Xinpu Han , Ji Li
Understanding the key factors that influence the interfacial transfer of charge carriers is crucial for improving the photocatalytic degradation of volatile organic compounds (VOCs). Herein, TiO2 samples with dominantly exposed (001) and (101) facets were synthesized. The density and types of hydroxyls on these facets were modified through alkali treatment. The surface photovoltage spectrum was measured in various atmospheres to analyze the interfacial charge transfer processes. The alkali treatment created additional terminal hydroxyls (OHt) on the (001) facets and bridging hydroxyls (OHb) on the (101) facets. OHt enhanced the migration of holes toward the (001) facets, and OHb facilitated the migration of electrons toward the (101) facets, thereby promoting charge separation. The accumulation of holes on the (001) facets was limited in the absence of OHt. H2O significantly enhanced charge separation in the presence of O2 and toluene, thereby improving both the adsorption and degradation of toluene. This work provides new insights into the interfacial processes involved in photocatalytic degradation of VOCs.
{"title":"Interfacial charge transfer mediated by bridging and terminal hydroxyls on the (001) and (101) facets of TiO2 in the photocatalytic degradation of toluene","authors":"Jinze Lyu ,&nbsp;Yaxin Zhao ,&nbsp;Ziyi Zhong ,&nbsp;Ting Zhang ,&nbsp;Xinpu Han ,&nbsp;Ji Li","doi":"10.1016/j.envres.2025.121649","DOIUrl":"10.1016/j.envres.2025.121649","url":null,"abstract":"<div><div>Understanding the key factors that influence the interfacial transfer of charge carriers is crucial for improving the photocatalytic degradation of volatile organic compounds (VOCs). Herein, TiO<sub>2</sub> samples with dominantly exposed (001) and (101) facets were synthesized. The density and types of hydroxyls on these facets were modified through alkali treatment. The surface photovoltage spectrum was measured in various atmospheres to analyze the interfacial charge transfer processes. The alkali treatment created additional terminal hydroxyls (OH<sub>t</sub>) on the (001) facets and bridging hydroxyls (OH<sub>b</sub>) on the (101) facets. OH<sub>t</sub> enhanced the migration of holes toward the (001) facets, and OH<sub>b</sub> facilitated the migration of electrons toward the (101) facets, thereby promoting charge separation. The accumulation of holes on the (001) facets was limited in the absence of OH<sub>t</sub>. H<sub>2</sub>O significantly enhanced charge separation in the presence of O<sub>2</sub> and toluene, thereby improving both the adsorption and degradation of toluene. This work provides new insights into the interfacial processes involved in photocatalytic degradation of VOCs.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"277 ","pages":"Article 121649"},"PeriodicalIF":7.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864733","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
The restoration of zinc pollution in smelting site soil using nanohydroxyapatite-modified cyanobacterial biochar and its mechanism
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-18 DOI: 10.1016/j.envres.2025.121652
Wentao Wu , Wanning Ye , Liu He , Mingru Wu , Jiaqi Li , Zhengbo Yue , Rui Deng
Heavy metal pollution in the soils at smelting sites must be effectively controlled. Recent advancements in stabilization technology have shown promising results in the remediation of heavy metal-contaminated soils. In this study, nanohydroxyapatite (nHAP) and cyanobacterial biochar were co-pyrolyzed to produce nHAP-modified cyanobacterial biochar (nHAP-CBC), which was applied to remediate Zn contamination of soils at smelting sites. The remediation effect of nHAP-CBC on Zn-contaminated soil was evaluated using batch experiments, and the materials were characterized using XRD, SEM, TEM, BET, and FTIR. These analyses confirmed the uniform dispersion of nHAP on the CBC to form a stable nHAP-CBC material. The results demonstrated that nHAP-CBC effectively converted Zn from an unstable state to a stable state, achieving a 65.79 % conversion rate and a 64.24 % stabilization rate during toxicity characteristic leaching after 45 days of treatment. nHAP-CBC was the most effective at fixing Zn and significantly increased the organic matter (OM) content, suggesting that OM played a key role in Zn fixation. In conclusion, the nHAP-CBC developed in this study can effectively stabilize heavy metals in smelting site soils and offers promising potential for expanding cyanobacterial resource utilization.
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引用次数: 0
Experimental and modeling investigation of long-term leachability of nickel in re-molded cement-stabilized sediments
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-17 DOI: 10.1016/j.envres.2025.121568
Long Chen , Yong-Hui Chen , Pan-Pan Tang , Wan-Lu Zhang
The environmental impact of recycling waste sediments as construction materials has raised significant concerns, particularly regarding the long-term leachability of heavy metals. This study investigates the leaching behavior of nickel (Ni) in cement-stabilized sediments through tank leaching tests and modeling approaches. Considering the practical construction scenario, the effects of curing age and ambient pH on Ni release were examined, including the impact of crushing and re-molding processes. The results indicate that Ni leaching follows a time-dependent pattern, strongly influenced by ambient pH but minimally affected by additional curing after re-molding. Across various curing ages, Ni release peaked between 9 and 16 days of leaching before gradually decreasing. Extreme acidic and alkaline conditions (pH = 1 and 14) significantly increased Ni leaching at later stages, whereas moderate pH conditions resulted in minimal mass loss. A leaching model based on non-equilibrium thermodynamics was developed, demonstrating good agreement with experimental data and reinforcing its reliability in predicting long-term metal release. These findings contribute to assessing the environmental feasibility of using cement-stabilized sediments in construction.
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引用次数: 0
Endocrine disruption potential of dust in children's indoor environments: Associations with multiple chemicals from various compound classes across exposure matrices used for health risk assessment
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-17 DOI: 10.1016/j.envres.2025.121614
Ylva Sjöström , Breanne Holmes , Niklas Ricklund , Nathalie Struwe , Katja Hagström , Jessika Hagberg , Maria Larsson
Indoor dust contains a complex mixture of chemicals, including endocrine-disrupting chemicals (EDCs), which may pose risks to children's health. As children spend most of their time indoors and have frequent dust contact, their exposure is heightened. This study quantified the endocrine disrupting potential of dust from children's indoor environments in Sweden, and assessed associations with flame retardants and plasticizers in dust, handwipes, and urine.
Fifty dust samples from 18 homes and 11 preschool units were analyzed for estrogen, anti-androgen, and thyroid receptor activities using human osteosarcoma cell-based luciferase reporter assays. Associations were evaluated with 21 legacy and 18 emerging halogenated flame retardants (HFRs) and 11 organophosphate esters (OPEs) in dust and handwipes, as well as nine plasticizers (eight phthalates and di-isononyl cyclohexane 1,2-dicarboxylate (DiNCH)) in dust, and 14 plasticizer metabolites in urine. Samples for biological and chemical analyses were collected from the same designated areas within a limited time frame.
Most dust samples exhibited estrogen receptor agonist (ER) and androgen receptor antagonistic (anti-AR) activity, while thyroid receptor (TR) induction was low. Preschool dust showed significantly higher estrogenic activity than home dust. No seasonal variation was observed. Associations were observed between dust hormonal activities and urinary plasticizer metabolites, as well as HFR and OPE concentrations in dust and handwipes. Relative potency (REP) analyses of 36 HFRs and OPEs revealed notable anti-AR activity for 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) (REP values .85 ± .10 (EC25) and .93 ± .07 (EC50)) and 2,2′,4,4′,6-pentabromo diphenyl ether (BDE-100) (REP values 2.74 ± .29 (EC25) and 3.23 ± .42 (EC50)). Additionally, BDE-100 showed low ER induction.
室内灰尘含有复杂的化学混合物,其中包括干扰内分泌的化学物质(EDCs),可能会对儿童的健康造成危害。由于儿童的大部分时间都在室内度过,经常接触灰尘,因此他们的暴露程度会更高。这项研究对瑞典儿童室内环境中灰尘的内分泌干扰潜力进行了量化,并评估了灰尘、擦手纸和尿液中阻燃剂和增塑剂的关联性。研究人员使用基于人类骨肉瘤细胞的荧光素酶报告分析法,对来自 18 个家庭和 11 个学龄前单位的 50 份灰尘样本进行了雌激素、抗雄激素和甲状腺受体活性分析。评估了灰尘和擦手纸中的 21 种传统卤化阻燃剂 (HFR) 和 18 种新出现的卤化阻燃剂 (HFR) 以及 11 种有机磷酸酯 (OPE)、灰尘中的 9 种增塑剂(8 种邻苯二甲酸盐和 1,2-环己烷二甲酸二异壬酯 (DiNCH))和尿液中的 14 种增塑剂代谢物之间的关联。大多数粉尘样本都具有雌激素受体激动剂(ER)和雄激素受体拮抗剂(anti-AR)活性,而甲状腺受体(TR)诱导作用较低。幼儿园粉尘的雌激素活性明显高于家庭粉尘。没有观察到季节性变化。粉尘中的激素活性与尿液中的塑化剂代谢物以及粉尘和擦手纸中的 HFR 和 OPE 浓度之间存在关联。36 种 HFR 和 OPE 的相对效力(REP)分析表明,2,2′,4,4′-四溴二苯醚(BDE-47)具有显著的抗AR 活性(REP 值 .85 ± .10 (EC25) 和 .93 ± .07 (EC50))和 2,2′,4,4′,6-五溴二苯醚(BDE-100)(REP 值为 2.74 ± .29 (EC25) 和 3.23 ± .42 (EC50))。此外,BDE-100 对 ER 的诱导作用较低。
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引用次数: 0
Plastic pollution in shooting ranges and warfare areas - an overlooked environmental issue
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-17 DOI: 10.1016/j.envres.2025.121626
Andrés Rodríguez-Seijo , Vanesa Lalín-Pousa , Paula Pérez-Rodríguez , Claudia Campillo-Cora , Paulo Pereira
Shooting ranges and military training fields, including warfare-impacted areas, have been widely recognized as environmentally impacted zones by inorganic and organic contamination, such as heavy metals, polycyclic aromatic hydrocarbons or explosive-related compounds. However, the possible contamination by plastics and microplastics in soil has been widely overlooked despite potential plastic sources, such as shotgun cartridges, plastic wads or landmines. Due to how these activities occur, plastics have remained in the field for decades or centuries, favoring their conversion from macro to microplastics, polluting the soil and water resources. Moreover, shooting and recreational activities such as airsoft or paintball practices could also be a substantial source of plastics to ecosystems; once shot, pellets can have conventional or biodegradable plastics in their composition, and there left in the environment, favouring impacts on soil properties. Although some initiatives have emerged to avoid the use of single-use plastics in shotgun ammunition, alternative materials (biodegradable plastics) can also be a potential risk, favouring the heavy metal bioavailability of shot pellets. These emerging pollutants should also be considered in these areas to understand if they could be a potential source of micro- and nanoplastics to the environment and, therefore, an environmental concern that requires changes at industrial and regulatory levels.
{"title":"Plastic pollution in shooting ranges and warfare areas - an overlooked environmental issue","authors":"Andrés Rodríguez-Seijo ,&nbsp;Vanesa Lalín-Pousa ,&nbsp;Paula Pérez-Rodríguez ,&nbsp;Claudia Campillo-Cora ,&nbsp;Paulo Pereira","doi":"10.1016/j.envres.2025.121626","DOIUrl":"10.1016/j.envres.2025.121626","url":null,"abstract":"<div><div>Shooting ranges and military training fields, including warfare-impacted areas, have been widely recognized as environmentally impacted zones by inorganic and organic contamination, such as heavy metals, polycyclic aromatic hydrocarbons or explosive-related compounds. However, the possible contamination by plastics and microplastics in soil has been widely overlooked despite potential plastic sources, such as shotgun cartridges, plastic wads or landmines. Due to how these activities occur, plastics have remained in the field for decades or centuries, favoring their conversion from macro to microplastics, polluting the soil and water resources. Moreover, shooting and recreational activities such as airsoft or paintball practices could also be a substantial source of plastics to ecosystems; once shot, pellets can have conventional or biodegradable plastics in their composition, and there left in the environment, favouring impacts on soil properties. Although some initiatives have emerged to avoid the use of single-use plastics in shotgun ammunition, alternative materials (biodegradable plastics) can also be a potential risk, favouring the heavy metal bioavailability of shot pellets. These emerging pollutants should also be considered in these areas to understand if they could be a potential source of micro- and nanoplastics to the environment and, therefore, an environmental concern that requires changes at industrial and regulatory levels.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"277 ","pages":"Article 121626"},"PeriodicalIF":7.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844781","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
Nano-selenium modified green eggshell biochar reduces cadmium accumulation in shallots (Allium schoenoprasum L.)
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-17 DOI: 10.1016/j.envres.2025.121635
Changwei Lai , Huiqing Yang , Zicheng Guo , Heyuan Yi , Tengbing He , Miao Chen , Guandi He
Green eggshell biochar, a renewable biomass material, demonstrates promising potential for environmental remediation. This study systematically prepared biochar under varying pyrolysis conditions and identified nano-selenium-modified biochar (produced at 600 °C for 3 h, termed 6-3 S) as the optimal formulation for cadmium (Cd) immobilization. Compared to untreated soil, the 6-3 S biochar reduced bioavailable Cd content by 38.65 % in contaminated soil. Correspondingly, Cd accumulation in shallot tissues decreased by 56.64 % (white parts) and 82.69 % (green parts). Furthermore, the 6-3 S treatment enhanced plant selenium levels by 21.3–29.8 % and preserved leaf microstructure integrity, reducing stomatal deformation by 44.2 % compared to controls. Additionally, Nitro Blue Tetrazolium (NBT) staining area decreased from 39.03 % to 24.00 %, indicating reduced oxidative stress. These dual effects—Cd suppression and selenium enrichment—significantly improved shallot quality and safety. The findings establish a scientific foundation for deploying nano-selenium-modified biochar in heavy metal-contaminated agricultural systems.
{"title":"Nano-selenium modified green eggshell biochar reduces cadmium accumulation in shallots (Allium schoenoprasum L.)","authors":"Changwei Lai ,&nbsp;Huiqing Yang ,&nbsp;Zicheng Guo ,&nbsp;Heyuan Yi ,&nbsp;Tengbing He ,&nbsp;Miao Chen ,&nbsp;Guandi He","doi":"10.1016/j.envres.2025.121635","DOIUrl":"10.1016/j.envres.2025.121635","url":null,"abstract":"<div><div>Green eggshell biochar, a renewable biomass material, demonstrates promising potential for environmental remediation. This study systematically prepared biochar under varying pyrolysis conditions and identified nano-selenium-modified biochar (produced at 600 °C for 3 h, termed 6-3 S) as the optimal formulation for cadmium (Cd) immobilization. Compared to untreated soil, the 6-3 S biochar reduced bioavailable Cd content by 38.65 % in contaminated soil. Correspondingly, Cd accumulation in shallot tissues decreased by 56.64 % (white parts) and 82.69 % (green parts). Furthermore, the 6-3 S treatment enhanced plant selenium levels by 21.3–29.8 % and preserved leaf microstructure integrity, reducing stomatal deformation by 44.2 % compared to controls. Additionally, Nitro Blue Tetrazolium (NBT) staining area decreased from 39.03 % to 24.00 %, indicating reduced oxidative stress. These dual effects—Cd suppression and selenium enrichment—significantly improved shallot quality and safety. The findings establish a scientific foundation for deploying nano-selenium-modified biochar in heavy metal-contaminated agricultural systems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"277 ","pages":"Article 121635"},"PeriodicalIF":7.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844257","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
Degradation of polyethylene by three bacteria isolated from coastal beach
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-17 DOI: 10.1016/j.envres.2025.121603
Jun-Qing Chen , Zhen Rong , Dao-Qiong Zheng , Yue-Hong Wu , Xue-Wei Xu
Polyethylene accumulates due to high production and slow degradation. Microbial degradation offers a promising solution for PE waste treatment. In this study, three bacterial strains, Alloalcanivorax sp. C16-1, Alloalcanivorax sp. C16-2, and Gordonia sp. R-1, were isolated from coastal plastic debris, each capable of utilizing polyethylene powder as the carbon source. After 30 days at 30 °C, low density polyethylene films showed modifications, including bacterial colonization, cracks, and holes as revealed by scanning electron microscopy. The water contact angle decreased, indicating increased hydrophilicity, while attenuated total reflection fourier transform infrared analysis confirmed surface oxidation with the formation of hydroxyl and carbonyl groups. High-temperature gel permeation chromatography showed decreases in the weight-average molecular weight of the films, indicating depolymerization. Nanoscale secondary ion mass spectrometry imaging demonstrated 13C assimilation from PE by the three strains at the single-cell level. Genomic analysis revealed that C16–1 and C16-2 were novel Alloalcanivorax species, with genes encoding potential PE-degrading enzymes, such as laccase and alkane hydroxylase, in all three isolates. These strains are widely distributed in marine environments, particularly in plastic accumulation hotspots, offering promising candidates for PE biodegradation research.
{"title":"Degradation of polyethylene by three bacteria isolated from coastal beach","authors":"Jun-Qing Chen ,&nbsp;Zhen Rong ,&nbsp;Dao-Qiong Zheng ,&nbsp;Yue-Hong Wu ,&nbsp;Xue-Wei Xu","doi":"10.1016/j.envres.2025.121603","DOIUrl":"10.1016/j.envres.2025.121603","url":null,"abstract":"<div><div>Polyethylene accumulates due to high production and slow degradation. Microbial degradation offers a promising solution for PE waste treatment. In this study, three bacterial strains, <em>Alloalcanivorax</em> sp. C16-1, <em>Alloalcanivorax</em> sp. C16-2, and <em>Gordonia</em> sp. R-1, were isolated from coastal plastic debris, each capable of utilizing polyethylene powder as the carbon source. After 30 days at 30 °C, low density polyethylene films showed modifications, including bacterial colonization, cracks, and holes as revealed by scanning electron microscopy. The water contact angle decreased, indicating increased hydrophilicity, while attenuated total reflection fourier transform infrared analysis confirmed surface oxidation with the formation of hydroxyl and carbonyl groups. High-temperature gel permeation chromatography showed decreases in the weight-average molecular weight of the films, indicating depolymerization. Nanoscale secondary ion mass spectrometry imaging demonstrated <sup>13</sup>C assimilation from PE by the three strains at the single-cell level. Genomic analysis revealed that C16–1 and C16-2 were novel <em>Alloalcanivorax</em> species, with genes encoding potential PE-degrading enzymes, such as laccase and alkane hydroxylase, in all three isolates. These strains are widely distributed in marine environments, particularly in plastic accumulation hotspots, offering promising candidates for PE biodegradation research.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"278 ","pages":"Article 121603"},"PeriodicalIF":7.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854818","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
Alteration to organismal behavior due to microplastic exposure
IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2025-04-17 DOI: 10.1016/j.envres.2025.121622
Andrew Barrick , Martin B. Berg , Tham C. Hoang
Influx of plastics into the biosphere has faced increased public scrutiny in the last twenty years. Plastics fragment into particles at the microscale which can lead them to interact with organisms in unanticipated ways. Research has focused on hazards linked to ingestion of microplastics with little research focused on how secondary effects influence organismal behavior and interspecies relationships. Plastics do not establish homogenous test suspensions; they either float or sink. The present study investigated how the presence of microplastics influenced the behavior of Daphnia magna, and two planktivorous fish, Pimephales promelas and Gambusia affinis. The study investigated two plastic types: fluorescent microspheres and microplastic fragments. The results demonstrated that microplastics influenced the behavior of the organisms with effects dependent on species and plastic type. Microplastics attracted D. magna and decreased their mobility and total swimming distance. Both fish species were more often found at the bottom of the chamber and their behavior was linked to D. magna location. Some changes in fish mobility were observed with fluorescent microspheres. Coloration of microplastics may have influenced the organism's responses results and further research is needed. Results of the present study reveal a potential effect of microplastics on communal distribution of aquatic organisms in natural ecosystems.
{"title":"Alteration to organismal behavior due to microplastic exposure","authors":"Andrew Barrick ,&nbsp;Martin B. Berg ,&nbsp;Tham C. Hoang","doi":"10.1016/j.envres.2025.121622","DOIUrl":"10.1016/j.envres.2025.121622","url":null,"abstract":"<div><div>Influx of plastics into the biosphere has faced increased public scrutiny in the last twenty years. Plastics fragment into particles at the microscale which can lead them to interact with organisms in unanticipated ways. Research has focused on hazards linked to ingestion of microplastics with little research focused on how secondary effects influence organismal behavior and interspecies relationships. Plastics do not establish homogenous test suspensions; they either float or sink. The present study investigated how the presence of microplastics influenced the behavior of <em>Daphnia magna</em>, and two planktivorous fish, <em>Pimephales promelas</em> and <em>Gambusia affinis</em>. The study investigated two plastic types: fluorescent microspheres and microplastic fragments. The results demonstrated that microplastics influenced the behavior of the organisms with effects dependent on species and plastic type. Microplastics attracted <em>D. magna</em> and decreased their mobility and total swimming distance. Both fish species were more often found at the bottom of the chamber and their behavior was linked to <em>D. magna</em> location. Some changes in fish mobility were observed with fluorescent microspheres. Coloration of microplastics may have influenced the organism's responses results and further research is needed. Results of the present study reveal a potential effect of microplastics on communal distribution of aquatic organisms in natural ecosystems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"277 ","pages":"Article 121622"},"PeriodicalIF":7.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855733","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
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Environmental Research
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