Environmental Research最新文献

{"title":"A hydrogel-based composite facilitates efficient and recyclable tetracycline biodegradation in aquatic environments.","authors":"Ze-Hua Cui, Qian He, Zhi-Peng Li, Yao Deng, Xiao-Ping Liao, Chaoqun Zhang, Jian Sun, Hao Ren, Lu Han","doi":"10.1016/j.envres.2025.121524","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121524","url":null,"abstract":"<p><p>Tetracycline antibiotics residues pose significant health risks to individual and public health by their cytotoxicity and promotion on antibiotic resistance spread. Tet(X4) is a newly-identified tetracycline-inactivating enzyme that efficiently eliminates all antibiotics within tetracycline class. To address the limitations of Tet(X4)-based approaches in suboptimal stability and cost-efficiency balance in realistic environments, this study established a hydrogel-based composite to encapsulate the Tet(X4) for efficiently and economically eliminating the tetracycline residues in aqueous environments. Herein, we synthesized a composite comprising carboxymethyl chitosan (CC), agarose (Ag), Tet(X4), Fe₃O₄, and CaO₂. It maintained 73.1 ± 9.4%, 50.0 ± 2.8% and 58.9 ± 0.6% of enzymatic activity with desirable tolerance to UV, and ionic strength. By exploring the properties of composites, we found that 3% Tet(X4) in a 1.0 g weighted composite with average diameters of 5.0 mm could efficiently degrade tetracycline residues. Additionally, the magnetic components in the composite conferred recyclability to the Tet(X4)-dependent biodegradation for multiple use, maximally reducing the costs. The composite endowed the promising applicability of Tet(X4) to eradicate approximately 85% the residual tetracyclines in various aqueous environments, including tap water, lakes, pharmaceutical wastewater, and livestock sewage. Mouse experiments showed that the as-prepared composites are totally safe and will not cause metabolic and immune abnormalities. Taken together, this study constructed a feasible platform to render the Tet(X4)-mediated tetracycline removal more stable and recyclable, highlighting encapsulation with the nanocarriers as a promising strategy to facilitate the enzymatic degradation of antibiotic residues with enhanced efficiency, stability and recyclability.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121524"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778541","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}

{"title":"α-Ag2WO4/g-C3N4: Investigation of the synthesis medium on composite properties and H2 evolution under simulated sunlight","authors":"Habiba Khiar ,&nbsp;Laura Carolina Valencia-Valero ,&nbsp;Alberto Puga ,&nbsp;Noureddine Barka","doi":"10.1016/j.envres.2025.121514","DOIUrl":"10.1016/j.envres.2025.121514","url":null,"abstract":"<div><div>The current paper proposes a new approach to address the low separation rate of photogenerated charge carriers in g-C₃N₄ by decorating it with low concentrations of α-Ag₂WO₄. g-C₃N₄ and α-Ag₂WO₄ were prepared separately via urea pyrolysis and co-precipitation, respectively. The composites were then physically prepared using a sonication-grinding method. The effect of the preparation medium was considered a crucial aspect of this study. Two different media were examined: pure water and a water/ethanol mixture (50 % v/v). It was found that pure water was more favorable for achieving high photocatalytic performance compared to the ethanol/water mixture. The photocatalytic hydrogen production through ethanol photoreforming under simulated solar light was investigated. The results showed that α-Ag₂WO₄/g-C₃N₄ (w), prepared in pure water, exhibited significantly higher efficiency for H₂ production compared to both pure g-C₃N₄ and the series prepared in the ethanol/water solution. This improvement was attributed to the intimate contact between the two phases in the heterojunction when water was used as the preparation medium. The optimal photocatalyst, 2 % α-Ag₂WO₄/g-C₃N₄ (w), achieved an H₂ evolution rate of 110.28 μmol g⁻¹ h⁻¹, whereas pure g-C₃N₄ reached only 25.32 μmol g⁻¹ h⁻¹. The formation of a heterojunction between α-Ag₂WO₄ and g-C₃N₄ promotes the separation of photogenerated charge carriers and prolongs their lifespan, which is the primary reason for the enhanced H₂ evolution activity.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121514"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776860","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}

{"title":"The impact of different types of extreme temperature events on mental disorders: A case-crossover study in Anhui Province, China.","authors":"Zihua Zhong, Jiayu Xu, Zehua Liu, Xiaoming Tang, Jiajia Zhang, Tianqin Xie, Yuewei Liu, Cunrui Huang, Daomin Zhu, Jing Wang","doi":"10.1016/j.envres.2025.121526","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121526","url":null,"abstract":"<p><strong>Background: </strong>Extreme temperatures are expected to be more frequent, intense, and complex in the context of climate change. However, epidemiologic evidence about associations between extreme temperature and mental disorders is limited.</p><p><strong>Methods: </strong>We conducted a case-crossover study in Anhui Province, China, focusing on outpatients diagnosed with mental and behavioral disorders (ICD-10 codes: F00-F99), further classified into schizophrenia (F20-F21), depression (F32-F33), and anxiety (F40-F41). Defining the day of each outpatient visit to the Anhui Mental Health Center as the case day, a total of 762,895 case days and 3,362,574 control days were included in the study, covering the period from 2019 to 2021. Each subject was geocoded based on their home address and matched with environmental exposures, including meteorological data and air pollutant data sourced from the CN05.1 and the TAP dataset, respectively. Extreme temperature events were categorized into heat and cold extremes, further divided into daytime, nighttime, and compound extremes.</p><p><strong>Results: </strong>Among the outpatient visits for mental disorders included in this study, the proportions were schizophrenia (28.9%), depression (23.9%), and anxiety (18.5%). Exposure to extreme heat and cold was associated with increased risks of outpatient visits for mental disorders, with odds ratios (ORs) of 2.23 (95%CI: 2.16-2.30) and 1.95 (1.89-2.01), respectively. Compound heat extremes posed the highest risk of mental disorders (OR=1.17, 95%CI: 1.13-1.22), followed by nighttime (OR=1.11, 95%CI: 1.08-1.14) and daytime heat (OR=1.05, 95%CI: 1.04-1.07). Notably, the risk of mental disorders significantly elevated with the increased intensity and duration of extreme heat events. Besides, extreme heat was strongly associated with higher risks of depression, schizophrenia and anxiety, while extreme cold was notably linked to schizophrenia.</p><p><strong>Conclusion: </strong>These findings indicate a significant correlation between extreme temperature exposure and elevated mental disorder risks, emphasizing the urgent need to address increased mental health risks posed by extreme temperatures in the changing climate.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121526"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778547","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}

{"title":"Recent and chronic ambient air pollution exposure in association with telomere length and mitochondrial DNA content in the general population","authors":"Pauline Hautekiet ,&nbsp;Tim S. Nawrot ,&nbsp;Dries S. Martens ,&nbsp;Esmée M. Bijnens ,&nbsp;Sigrid C.J. De Keersmaecker ,&nbsp;Johan Van der Heyden ,&nbsp;Eva M. De Clercq ,&nbsp;Nelly D. Saenen","doi":"10.1016/j.envres.2025.121525","DOIUrl":"10.1016/j.envres.2025.121525","url":null,"abstract":"<div><div>Telomere length (TL) and mitochondrial DNA content (mtDNAc) are biomarkers of biological ageing that respond to multiple stressors, including air pollution. Despite growing research interest, the association between recent and chronic air pollution and these biomarkers in the general population remains unclear. This study investigated the association between air pollution exposure and TL and mtDNAc using data from the 2018 Belgian Health Examination Survey. Multivariable adjusted generalised linear mixed models were applied to assess the exposure to nitrogen dioxide (NO₂), fine particulate matter ≤2.5 μm (PM_2.5), and black carbon (BC) over 1-week (recent) and 1-year (chronic) periods prior to participation, estimated with a high-resolution spatiotemporal model. Leucocyte TL and mtDNAc were measured using qPCR. A total of 756 participants (mean age 50.6 years, 49.9 % women) were included in the study. Recent exposure to PM_2.5 was associated with a 2.40 % (95 % CI: 0.16, 4.69; <em>p</em> = 0.036) longer TL per IQR increment. Trends of lower mtDNAc were observed for chronic exposure to BC (−3.11, 95 % CI: -6.19, 0.07; <em>p</em> = 0.055) and NO₂ (−4.02, 95 % CI: -8.22, 0.36; <em>p</em> = 0.072) per IQR increment. No significant associations were observed between chronic air pollution and TL or recent exposure and mtDNAc. These results suggest an inverse association between chronic air pollution and mtDNAc, and a positive association between recent exposure and TL, providing insight into the time-sensitive and air pollutant effects on ageing biomarkers.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121525"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776770","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}

{"title":"ADB-FUBINACA-induced developmental toxicity, neurotoxicity, and cardiotoxicity in embryonic zebrafish (Danio rerio)","authors":"Yuanzhao Wu ,&nbsp;Fengjun Fan ,&nbsp;Lu Zhou ,&nbsp;Yihang Shen ,&nbsp;Anli Wang ,&nbsp;Yazhou Qin ,&nbsp;Jiye Wang ,&nbsp;Weixuan Yao","doi":"10.1016/j.envres.2025.121517","DOIUrl":"10.1016/j.envres.2025.121517","url":null,"abstract":"<div><div>As an emerging pollutant, the synthetic cannabinoid N-(1-amino-3,3-dimethyl-1-oxobutan-2-yl)-1-(4-fluorobenzyl)-1H-indazole-3-carboxamide (ADB-FUBINACA) is widely abused and frequently detected in metropolitan wastewater. However, its effect on aquatic organisms remains unexplored. In this study, embryonic and larval zebrafish were exposed to sublethal concentrations of ADB-FUBINACA to assess its toxic effects via behavioral, biochemical, and metabolomic analyses. The observed morphological defects included reduced heartbeat, shorter body length, spinal deformation, and pericardial edema. Transgenic zebrafish exhibited cardiac developmental defects and apoptosis, indicating that cardiotoxicity is associated with dysregulated gene expression. Impaired motor activity and disrupted neuronal development suggested neurotoxicity. Elevated reactive oxygen species (ROS) and malondialdehyde (MDA) levels indicate oxidative stress, whereas transcriptional changes in immune-related genes reflect a dysregulated inflammatory response. Metabolomic analyses revealed disruptions in pathways related to alanine, purine, and pyrimidine metabolism, and arginine biosynthesis, which correlated with oxidative damage, cardiotoxicity, and neurodevelopmental effects. In conclusion, ADB-FUBINACA induces developmental toxicity in zebrafish embryos via oxidative stress and metabolic disruption, highlighting the potential environmental risks posed by this emerging pollutant.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121517"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760841","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}

{"title":"Recent advances on photocatalytic degradation of phthalate ester plasticizers using nanomaterial photocatalysts","authors":"Huanshun Yin ,&nbsp;Yunlei Zhou ,&nbsp;Chengji Sui ,&nbsp;Jia Ding ,&nbsp;Jun Wang","doi":"10.1016/j.envres.2025.121497","DOIUrl":"10.1016/j.envres.2025.121497","url":null,"abstract":"<div><div>Phthalate esters (PAEs) are a class of organic ester compounds containing benzene rings, which have been widely applied as additives in various fields, especially as plasticizers in plastic product to improve the flexibility. Due to the non- covalent bonding, PAEs inevitably leach out from the plastic polymers into environments. PAEs are endocrine disruptors, which possess seriously hazards to organisms, such as reproductive and genetic abnormalities. Now, PAEs pollution has become a serious environmental problem. Moreover, due to its difficulty in natural degradation, it has become a widespread concern to eliminate PAEs pollution with energy-saving technology. Among various degradation technologies for organic pollutant removal, photocatalytic degradation has attracted more attentions due to the merits of low energy consumption, high removal efficiency, abundant photocatalyst and low secondary pollution. In this article, the photocatalytic degradation using nanomaterial photocatalysts towards four kinds of typical PAEs were reviewed, including di(2-ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), dimethyl phthalate (DMP), and diethyl phthalate (DEP). To improve the photocatalytic degradation efficiency, various semiconductor photocatalysts have been developed, and the optical and electrochemical properties, and the degradation mechanism and pathway have been also discussed. Finally, the challenges and perspectives of photocatalytic technology on PAEs elimination were presented.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121497"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767817","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}

{"title":"Early Warning on the Potential Harmful Algal Bloom Species in Beibu Gulf of South China Sea under the background of Climate Change and Human Activity.","authors":"Junjie Zheng, Jiarong Hu, Ruoyu Guo, Douding Lu, Xinfeng Dai, Ruifang Wang, Haiyan Jin, Zihan Sun, Jiongyi Li, Fajin Chen, Jianfang Chen, Pengbin Wang","doi":"10.1016/j.envres.2025.121516","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121516","url":null,"abstract":"<p><p>Human activity and global climate change increasingly affect marine environments, leading to increases in harmful algal blooms (HABs) caused by phytoplankton. These blooms pose significant threats to public health, tourism, fisheries, and ecosystems. As an important fishing ground and tourist destination, the Beibu Gulf faces growing environmental pressure. This study sought to assess the phytoplankton community structure and status of HABs, with a focus on potential HAB species. Using environmental DNA (eDNA) metabarcoding, summer and winter surveys at both coastal and offshore waters revealed 66 potential HAB species, 23 of which were newly recorded in the Beibu Gulf. The potential HAB species exhibited greater richness and relative abundance in summer than in winter. Offshore areas showed greater diversity, whereas coastal areas showed greater relative abundance. Temperature emerged as the most influential factor shaping phytoplankton composition, and pH was found to play an important role in coastal areas. Nutrients such as silicate and ammonium are critical for the distribution of potential HAB species. Among the potential HAB species, Cyclotella cryptica predominated in coastal areas during winter, whereas Chaetoceros tenuissimus predominated in summer. Some species that caused severe HAB events in other oceanic regions were first detected in this study, including Margalefidinium polykrikoides, Karlodinium veneficum, and Prorocentrum concavum. This study revealed the diversity and complexity of the phytoplankton community in the Beibu Gulf, emphasizing the critical importance of monitoring and early warning of potential HAB species, particularly those driven by human activities and climate change.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121516"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778543","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}

{"title":"Tracking Toxic Chemical Exposure in Uganda: Insights from Silicone Wristbands.","authors":"Yaw Edu Essandoh, Tessa Steiniche, Chunjie Xia, Kevin Romanak, Jimmy Ogwang, Richard Mutegeki, Michael Wasserman, Marta Venier","doi":"10.1016/j.envres.2025.121522","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121522","url":null,"abstract":"<p><p>The increasing use of synthetic chemicals, including pesticides for agriculture and flame retardants from consumer products like electronics, raises environmental concerns for public health and biodiversity, particularly in agricultural and rural communities. Although these chemicals have been extensively studied in industrialized regions, data on human exposure particulary near protected areas in sub-Saharan Africa, remain scarce. This study provides novel insights into chemical exposure among different occupational groups in Uganda using silicone wristbands. We collected 39 silicone wristbands from participants living around Kibale National Park, including tea workers (n = 8), researchers (n = 10), commercial farmers (n = 6), subsistence farmers (n = 7), and urban workers (n = 8), and analyzed for 21 polybrominated biphenyl ethers (PBDEs), 11 novel flame retardants (nFRs), 20 current-use pesticides (CUPs), and 21 organochlorine pesticides (OCPs). CUPs were the most abundant chemicals detected (range 18.2-54.4 ng/g), significantly higher for commercial and subsistence farmers and tea workers. Urban workers and researchers had higher levels of PBDEs and nFRs than the other three groups with BDE-47, -99, -139, -153, -209, bis (2-ethylhexyl) tetrabromophthalate (BETHTBP) and decabromodiphenylethane (DBDPE) being the most detected compounds. Ametryn, ß-HCH, o,p'-DDT, p,p'-DDT, and endosulfan sulfate were the most frequently detected pesticides. The widespread detection of legacy and emerging chemicals at levels similar to urban and industrialized areas among populations near a protected area in Eastern Africa highlights an urgent environmental and public health concern.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121522"},"PeriodicalIF":7.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778550","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}

{"title":"Unveiling microplastic pollution: Evaluating the role of Sinotaia quadrata (Caenogastropoda, Viviparidae) as a monitoring tool in freshwater ecosystems","authors":"Alice Gabetti ,&nbsp;Annamaria Nocita ,&nbsp;Alessandra Maganza ,&nbsp;Camilla Mossotto ,&nbsp;Serena Anselmi ,&nbsp;Tecla Bentivoglio ,&nbsp;Giuseppe Esposito ,&nbsp;Elena Bozzetta ,&nbsp;Antonia Concetta Elia ,&nbsp;Monia Renzi ,&nbsp;Marino Prearo ,&nbsp;Damià Barceló ,&nbsp;Paolo Pastorino","doi":"10.1016/j.envres.2025.121513","DOIUrl":"10.1016/j.envres.2025.121513","url":null,"abstract":"<div><div>Freshwater species play a key role in monitoring microplastics (MPs) pollution, providing insights into its distribution, accumulation, and potential ecological and human health risks in aquatic ecosystems. This study evaluates the invasive snail <em>Sinotaia quadrata</em> as a potential tool for monitoring MPs pollution in freshwater ecosystems heavily impacted by human activities. Specifically, we examined whether the characteristics of MPs (i.e., shape, color, and chemical composition) found in water and sediment were reflected in those accumulated by <em>S. quadrata</em>, and whether MPs accumulation varied across different snail size classes. MPs were detected in all environmental matrices and snail samples, with fragments and filaments as the dominant shapes, blue, white, and black as the most common colors, and polypropylene, polyethylene, and polyethylene terephthalate as the primary polymers. A significant difference in MPs concentration per gram was found across snail size classes, with smaller snails accumulating more MPs than larger individuals, likely due to higher feeding rates during growth. A positive correlation was observed between snail shell length and weight, while MPs concentration per gram showed significant negative correlations with both parameters. These findings suggest that <em>S. quadrata</em> accumulates MPs from the environment, reflecting local contamination levels. While <em>S. quadrata</em> is an invasive species, this study demonstrates its potential utility in MPs monitoring, particularly in the context of eradication efforts. This approach integrates pollution assessment with invasive species management, offering a broader perspective on the role of biological invasions in environmental monitoring.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121513"},"PeriodicalIF":7.7,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746401","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}

{"title":"Assessment of the sorptive fractionation of organic matter at the goethite-water interface","authors":"Marawit Tesfa ,&nbsp;Aline Dia ,&nbsp;Khalil Hanna ,&nbsp;Wei Cheng ,&nbsp;Mathieu Pédrot ,&nbsp;Rémi Marsac","doi":"10.1016/j.envres.2025.121505","DOIUrl":"10.1016/j.envres.2025.121505","url":null,"abstract":"<div><div>The carboxylic (COOH) and phenolic (PhOH) functional groups of natural organic matter (NOM) are the major binding sites for environmental compounds such as minerals and contaminants. This study focusses on the sorptive fractionation of a humic acid onto goethite (α-FeOOH) at various pH, [NOM], [NaCl], and under static (batch) and dynamic flow (column) conditions. During batch experiments at low pH and [NOM], adsorption behaviors of COOH- and PhOH-rich compounds were similar. At low [NaCl] and high pH or [NOM], the adsorption of NOM decreased, with a preferential adsorption of PhOH over COOH-rich compounds. This can be ascribed to the surface site saturation and competition between COOH, PhOH and OH⁻ for surface binding, combined with electrostatic effects. Higher [NaCl], which was previously shown to favor NOM-NOM interactions at mineral surface, led to increased adsorption of COOH, while the adsorption of PhOH was not affected. Under flow-through conditions, multiple-binding-site mechanism was shown to control the fractionation of PhOH- and COOH-rich compounds. These results provide insights into the molecular interactions between the NOM and soil components, which control the fate and behavior of contaminants and nutrients in the environment.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121505"},"PeriodicalIF":7.7,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}