Environmental Research最新文献

{"title":"Seawater nanoarchitectonics for an eco-friendly dual-function activator-catalyst producing graphene-decorated activated biochar for applications in electrochemical energy storage","authors":"Authit Phakkhawan ,&nbsp;Suppanat Kosolwattana ,&nbsp;Morakot Sakulsombat ,&nbsp;Samuk Pimanpang ,&nbsp;Pawinee Klangtakai ,&nbsp;Vittaya Amornkitbamrung","doi":"10.1016/j.envres.2025.121176","DOIUrl":"10.1016/j.envres.2025.121176","url":null,"abstract":"<div><div>Activated biochar (AB) powder derived from sawdust was prepared using 0.6 M NaCl as a dual-function activator-catalyst at temperatures ranging from 500 to 1000 °C. The AB synthesized at 900 °C (NaCl-AB-900) shows the highest specific surface area (880.05 m² g⁻¹). Seawater was then used as the dual activator-catalyst to explore sustainable alternatives, producing Seawater-AB-900 powder with a specific surface area similar to the NaCl-AB-900 powder (890.34 m² g⁻¹). In contrast, the non-activated biochar (Non-AB-900, 782.45 m² g⁻¹) has a smaller specific surface area than both AB powders. SEM and TEM analyses reveal that both AB powders have graphene decoration and porosity, whereas the Non-AB-900 powder only exhibits porosity. Electrodes made from NaCl-AB-900 and Seawater-AB-900 powders demonstrate higher specific capacitances (81.42 and 84.45 F g⁻¹) compared to Non-AB-900 (64.39 F g⁻¹) at 0.3 A g⁻¹ in a three-electrode system using 6 M KOH. They also exhibit better rate capability (76.54% and 70.44%) than Non-AB-900 (65.24%). In a two-electrode mode, NaCl-AB-900 and Seawater-AB-900 supercapacitors outperform Non-AB-900 in capacitance (51.76 F g⁻¹, 50.68 F g⁻¹ vs. 25.96 F g⁻¹ at 0.3 A g⁻¹) and rate capability (64.50%, 65.20% vs. 27.59% at 10 A g⁻¹). In a Zn-ion battery system, NaCl-AB-900 (137.07 mAh g⁻¹) and Seawater-AB-900 (142.29 mAh g⁻¹) deliver higher specific capacities than Non-AB-900 (69.03 mAh g⁻¹) at 0.3 A g⁻¹. Both AB electrodes show excellent cycle stability, with over 70% retention after 40000 supercapacitor cycles and 90% after 7000 battery cycles. The Seawater-AB-900-powered supercapacitors and batteries successfully lit an LED for over 2 min.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121176"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475989","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":"Simultaneously ammonium and perchlorate remove via the partial nitrification-anammox coupled sulfur autotrophic system","authors":"Guiying Zhang ,&nbsp;Jingmei Liu ,&nbsp;Yi Han ,&nbsp;Liang Xia ,&nbsp;Jianbing Zhang ,&nbsp;Jianbo Guo ,&nbsp;Haibo Li ,&nbsp;Yanan Hou ,&nbsp;Yuanyuan Song","doi":"10.1016/j.envres.2025.121195","DOIUrl":"10.1016/j.envres.2025.121195","url":null,"abstract":"<div><div>In this study, partial nitrification-anammox coupled sulfur autotrophic (PNA-SA) system was constructed for removing ammonium and perchlorate from composite wastewater simultaneously. The removal rates of ammonium and perchlorate could reach 94.2% and 93.1%, respectively, at an ammonium concentration of 60 mg N∙L⁻¹ and a perchlorate concentration of 30 mg N∙L⁻¹. Ammonium was mainly removed by anammox bacteria (AnAOB) in PNA reactor, while perchlorate removal was attributed to perchlorate reducing bacteria (PRB) in SA reactor. Furthermore, combined with Pearson analysis, N-acylhomoserine lactones (AHLs)-mediated quorum sensing regulated the production of TB-EPS, improving biofilm stability and thus ensuring the removal performance of reactors. 16sRNA gene sequencing results indicated that the key functional bacteria in the PNA reactor were <em>Comamonas</em> and <em>Candidatus Kuenenia</em>, and the key functional bacteria in the SA reactor were <em>Sulfurimonas</em>, <em>Thiobacillus</em>, and <em>Defluviimonas</em>. These key functional bacteria ensured PNA-SA system feasibility and stability. Such results indicated that PNA-SA system could be used to treat ammonium and perchlorate composite wastewater, thereby providing a new strategy for removing such composite wastewater.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121195"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474746","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":"Co-exposure to cyazofamid and polymyxin E: Variations in microbial community and antibiotic resistance in the soil-animal-plant system","authors":"Jun Zhao ,&nbsp;Guilan Duan ,&nbsp;Jing Chang ,&nbsp;Huili Wang ,&nbsp;Dong Zhu ,&nbsp;Jianzhong Li ,&nbsp;Yongguan Zhu","doi":"10.1016/j.envres.2025.121160","DOIUrl":"10.1016/j.envres.2025.121160","url":null,"abstract":"<div><div>Human activity is accelerating the emergence of fungal pathogens, prompting substantial efforts to discover novel fungicides. Meanwhile, the runoff and spray drift from agricultural fields adversely affect aquatic and terrestrial nontarget organisms. However, few studies have examined the effects of co-contamination by agrochemical fungicides and pharmaceutical antibiotics on microorganisms and antibiotic resistance genes (ARGs) in the soil-animal-plant system. To further explore the mechanisms, an investigation was conducted into the individual and combined effects of a widely used fungicide (cyazofamid, CZF) and a last-resort antibiotic (colistin, polymyxin E, PME) in the soil-earthworm-tomato system. This study revealed that CZF and PME co-contamination exerted synergistic toxicity, significantly reducing earthworm survival and inhibiting tomato growth. This study found that the structure of microbial communities was more severely disturbed by the fungicide CZF than by the antibiotic PME, with the most severe impact being that of CZF + PME co-contamination. Fungicides and antibiotics had significantly distinct effects on bacterial functional pathways: CZF and CZF + PME treatments enhanced compound degradation, whereas PME treatments promoted biological nitrogen cycling. Moreover, co-contamination significantly increased the abundance of insertional and plasmid-associated genes and number of total ARGs in bulk and rhizosphere soil. In addition, the relationships between bacterial communities and the antibiotic resistome were investigated. The analysis revealed that Gram-positive bacteria (<em>Sporosarcina</em>, <em>Bacillus</em>, and <em>Rhodococcus</em>) capable of resistance and degradation, as well as the genes <em>MexB</em> (multidrug) and <em>aadA2</em> (aminoglycoside) were enriched. Taken together, interactions between co-pollutants can significantly increase toxicity levels and the risk of ARG proliferation. The findings provide new insights into the potential impacts of co-contamination in complex real-life environments, such as soil–animal–plant systems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121160"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475972","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":"Occupational pesticide use and relative leukocyte telomere length in the biomarkers of exposure and effect in agriculture study","authors":"Patricia A. Erickson ,&nbsp;Vicky C. Chang ,&nbsp;Shisi He ,&nbsp;Casey Dagnall ,&nbsp;Kedest Teshome ,&nbsp;Mitchell J. Machiela ,&nbsp;Kathryn Hughes Barry ,&nbsp;Edna F.R. Pereira ,&nbsp;Shahinaz M. Gadalla ,&nbsp;Christine G. Parks ,&nbsp;Sonja I. Berndt ,&nbsp;Laura E. Beane Freeman ,&nbsp;Gabriella Andreotti ,&nbsp;Jonathan N. Hofmann","doi":"10.1016/j.envres.2025.121174","DOIUrl":"10.1016/j.envres.2025.121174","url":null,"abstract":"<div><div>Previous epidemiological studies have reported increased risks of certain cancers in relation to pesticide exposures. Although the biologic mechanisms underlying these associations are not well understood, altered telomere length has been hypothesized to play a role.</div><div>We examined associations between occupational use of specific pesticides and leukocyte telomere length in the Biomarkers of Exposure and Effect in Agriculture study, a molecular epidemiological investigation of pesticide applicators in Iowa and North Carolina.</div><div>Relative telomere length (RTL) was measured using quantitative polymerase chain reaction in leukocytes from 1539 male pesticide applicators ≥50 years of age. We evaluated lifetime use of 47 pesticides in terms of self-reported ever use and intensity-weighted lifetime days (IWLDs), a metric integrating lifetime days of use and other factors influencing exposure. Multivariable linear regression was used to estimate percent difference in geometric mean RTL in relation to ever (vs. never) use, IWLDs of use, and timing of use [recent (last 12 months) and former vs. never use].</div><div>Mean RTL was significantly longer among ever users of the insecticides lindane (percent difference = 2.20%, 95%CI: 0.45%, 3.99%) and aldicarb (percent difference = 3.27%, 95%CI: 0.23%, 6.40%). Longer RTL was also associated with increasing IWLDs of lindane (highest quartile vs. never use: percent difference = 4.51%, 95%CI: −0.22%, 9.46%; <em>p-trend</em> = 0.048) and the insecticide diazinon (4.77%, 95%CI: 0.17%, 9.58%; <em>p-trend</em> = 0.055), and with recent use of the insecticide dichlorvos (vs. never use: 8.15%, 95%CI: 1.31%, 15.46%). Increasing IWLDs of the insecticide heptachlor and the herbicide 2,4,5-TP and recent use of the herbicide metolachlor were significantly associated with shorter RTL.</div><div>Our findings provide novel evidence suggesting that use of certain pesticides is associated with altered leukocyte telomere length. Notably, diazinon and lindane have previously been associated with increased risks of lung and lymphoid malignancies, respectively, and longer leukocyte telomere length has been implicated in the development of these cancers.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121174"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475981","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":"Fuel-based lighting and under-five morbidity in semi-rural Mozambique: A cohort study","authors":"Ariadna Curto ,&nbsp;Jovito Nunes ,&nbsp;Fabián Coloma ,&nbsp;Stefan Sieber ,&nbsp;Herminio Cossa ,&nbsp;Teodimiro Matsena ,&nbsp;Aura Hunguana ,&nbsp;Charfudin Sacoor ,&nbsp;Edgar Jamisse ,&nbsp;António Sitoe ,&nbsp;Quique Bassat ,&nbsp;Francisco Saute ,&nbsp;Cathryn Tonne","doi":"10.1016/j.envres.2025.121199","DOIUrl":"10.1016/j.envres.2025.121199","url":null,"abstract":"<div><h3>Background</h3><div>Mozambique has one of the lowest electrification rates in the world, leaving its population dependent on polluting fuels for lighting. Limited epidemiological evidence links fuel-based lighting to child health. We examined associations between polluting lighting sources, particularly kerosene, and under-five morbidity in a semi-rural district in Mozambique.</div></div><div><h3>Methods</h3><div>We constructed a birth cohort from demographic and hospital-based pediatric morbidity surveillance data. We included children born in Manhiça district between January 1, 2016, and December 31, 2020. The most common lighting source (polluting vs clean) used during follow-up was used as exposure. The outcome was the frequency of all-cause and respiratory-linked hospital visits in any of the seven surveilled health facilities within the district. We used zero-inflated negative binomial regression models to calculate Rate Ratios (RR) adjusted for potential confounders at the child, mother, and household level.</div></div><div><h3>Results</h3><div>We included 17,815 under-five children (49% female) living in 13,574 households. Nearly a quarter of children (24.7%) lived in households using polluting lighting fuels. During follow-up, there were a total of 69,677 all-cause hospital visits (53% respiratory-linked). Children in households with polluting lighting had a 2% higher rate of all-cause hospital visits (RR: 1.02, 95% CI: 0.98, 1.06) and a 2% lower rate of respiratory-linked hospital visits (RR: 0.98, 95% CI: 0.94, 1.03) compared to those with clean lighting. Results were robust to sensitivity analyses testing alternative inclusion criteria based on the definition of health facility catchment area and duration of follow-up time covered by the surveillance system.</div></div><div><h3>Conclusion</h3><div>Polluting compared to cleaner lighting sources were not associated with hospital visits among children under five. Intervention-based research is needed to better understand the health impacts of air pollution from fuel-based lighting among children living in areas with limited access to electricity.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121199"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475975","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}

{"title":"Wildfire and wood smoke effects on human airway epithelial cells: A scoping review","authors":"Behzad Heibati ,&nbsp;Harald Renz ,&nbsp;Paige Lacy","doi":"10.1016/j.envres.2025.121153","DOIUrl":"10.1016/j.envres.2025.121153","url":null,"abstract":"<div><h3>Background</h3><div>Wildfires, which occur naturally but are increasingly intensified by climate change, release a complex mixture of organic and inorganic pollutants. These emissions have significant public health implications, contributing to increased morbidity and mortality. Epidemiological and clinical studies have consistently shown that exposure to wildfire smoke exacerbates respiratory conditions such as chronic obstructive pulmonary disease (COPD) and asthma. There are many epidemiological studies of the potential impact of smoke on human health; however, there are remarkably few <em>in vitro</em> studies, and an investigation of the underlying mechanisms of wildfire and wood smoke exposure on airway epithelial cells is required to better understand their toxicity and significance.</div></div><div><h3>Objectives</h3><div>This scoping review aimed to critically examine studies on the association between wildfire and wood smoke exposure and airway epithelial cell responses.</div></div><div><h3>Methods</h3><div>We conducted a systematic search of relevant studies that used a combination of keywords related to wood smoke, wildfire, and epithelial cells and were published up to May 2024. Studies were retrieved from MEDLINE, PubMed, Google Scholar, and Web of Science.</div></div><div><h3>Results</h3><div>Twenty-three studies fulfilled our inclusion criteria and were included. This review highlights inflammation, oxidative stress, and cytotoxicity as key impacts of wildfire and wood smoke on airway epithelial cells, causing lung damage. More studies are needed to understand these effects and guide prevention strategies.</div></div><div><h3>Discussion</h3><div>This scoping review underscores the need for further research to better understand the complex biological endpoints associated with exposure to wildfire/wood smoke, informing strategies to mitigate health effects, ultimately improving health and well-being of population exposed to wildfire/wood smoke.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121153"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143476018","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":"Mercury exposure and childhood outcomes: an overview of systematic reviews.","authors":"Lauren E O'Connor, Maureen K Spill, Rupal Trivedi, Sanjoy Saha, Rachel Thoerig, Margaret Foster, Amanda J MacFarlane","doi":"10.1016/j.envres.2025.121196","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121196","url":null,"abstract":"<p><strong>Objective: </strong>The objective of this review was to summarize recent and relevant systematic reviews (SRs) that assessed relationships between mercury (Hg) exposure during pregnancy, lactation, and childhood and child outcomes.</p><p><strong>Evidence review: </strong>Three electronic databases were searched for SRs published between Jan 2018 to December 2024 about Hg exposure of any form or source, including seafood, during pregnancy, lactation or childhood and child outcomes including: anthropometrics, neurodevelopment, attention deficit hyperactivity disorder (ADHD), autism spectrum disorder (ASD), gene expression, cardiometabolic health, immunity, and birth outcomes. All articles were screened at title and abstract, and full-text levels by two independent reviewers. A MeaSurement Tool to Assess systematic Reviews (AMSTAR) 2 critical appraisal tool was used to assess the methodological quality of the included SRs.</p><p><strong>Findings: </strong>Twenty-nine SRs of observational studies were identified that assessed Hg during pregnancy (n=19) and/or childhood (n=17). During pregnancy, results from the SRs suggested that higher Hg may be associated with higher risk of birth defects, pre-term birth, ADHD, ASD, and low birth weight, length, and head circumference. Results varied for neurodevelopment outcomes in the child, likely due to co-exposure with seafood during pregnancy, variation in response by sex of the child, and etiological differences among developmental domains. During childhood, SRs suggested that higher Hg may be associated with higher risk of ADHD and adverse neurodevelopment, growth, and body composition outcomes. Also, Hg concentrations were higher in children with ASD than those without in case-control studies but longitudinal data were lacking. Evidence on methylmercury exposure from seafood during pregnancy and childhood was limited and inconclusive.</p><p><strong>Conclusion and relevance: </strong>Mercury exposure during pregnancy and childhood is recognized as a major public health concern. However, more research is needed that specifically examines methylmercury from seafood to better inform future dietary recommendations.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121196"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475978","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 reanalysis of a new strategy for groundwater level prediction using combined simulation of machine learning and Muskingum methods under ecological water replenishment","authors":"Kangning Sun ,&nbsp;Qian Tan ,&nbsp;Litang Hu ,&nbsp;Qiao Xu","doi":"10.1016/j.envres.2025.121194","DOIUrl":"10.1016/j.envres.2025.121194","url":null,"abstract":"<div><div>Due to its multi-functionality, ecological water replenishment (EWR) has been an important measure for restoring aquifers. However, suitable prediction methods need to be selected for the unique fluctuation exhibited by groundwater level (GWL) in the process of EWR. This study employed a novel coupling model, RFR-MUS, to address this issue. RFR-MUS captured the important variable of river infiltration, which had a significant impact on GWL, and was able to achieve reliable prediction. Besides, the generalization ability, physical interpretability and application potential of RFR-MUS were explored. The results showed that the Nash-Sutcliffe efficiency coefficient (NSE) values of the predicted GWL during unknown EWR periods for more than 50% observation wells were higher than 0.6. And NSEs of the predicted GWL for 12 unknown observation wells range between −0.08 and 0.95, and the larger area affected by EWR, the higher accuracy of the simulated results. The analysis of interpretability ability of RFR-MUS is conducted by comparing the differences in explaining variable contribution with a physics-based model. The results showed that the total contribution of variables EWR and time was similar to that of EWR in physics-based model, with the highest contribution rate exceeding 95%. In addition, the results of shapley additive explanations revealed that RFR-MUS could capture the dynamics of GWL impacted by EWR, which initially increases and subsequently diminishes over time. In several verification scenarios, the response of GWL simulated by RFR-MUS to EWR was consistent with observation data, in which the maximum rise of GWL would be higher than 20 m. This study can provide a new strategy for integrating physics knowledge into ML and can also be referred as a method for GWL prediction during EWR.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121194"},"PeriodicalIF":7.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475994","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":"Boron-doped graphene-based nanoflower-catalyst promoting low temperature NH₃-SCR performance: An interesting site.","authors":"Weijie Zheng, Zhiwei Zhang, Xiansheng Hong, Yuying Zheng","doi":"10.1016/j.envres.2025.121189","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121189","url":null,"abstract":"<p><p>A series of boron-doped graphene-supported nanoflower-catalysts (nf-MnO_x/BG) were synthesized using an in-situ method to boost intrinsic catalytic performance. The regulation of catalyst structure, morphology, and active sites was systematically researched to explore the promoting factors of catalytic activity. The prepared nf-MnO_x/BG-3 catalyst achieves superior NH₃-SCR performance throughout the test process (≥90% NO_x conversion at the temperature ranging from 140 to 280 ^oC), comparable to the current mainstream graphene-based catalyst. The ratios of O_α/(O_α + O_β) and Mn⁴⁺/Mn³⁺are effectively increased by boron atom doping, which is strongly associated with excellent catalytic deNO_x efficiency. Meanwhile, the boron sites with unpaired electronic structures accelerate the reaction of fast-SCR by promoting oxidation and adsorption of nitrogen oxide species. Interestingly, the boron sites can be used as an additional Lewis acid and adsorbed NO₂ site to participate in the low-temperature SCR reaction and effectively improve the low-temperature activity.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121189"},"PeriodicalIF":7.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143472019","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":"Occurrence and risk assessment of different cyanotoxins and their relationship with environmental factors in six typical eutrophic lakes of China","authors":"Huiting Yang ,&nbsp;Yujia Yao ,&nbsp;Wei Chen ,&nbsp;Xiaohong Gu ,&nbsp;Huihui Chen ,&nbsp;Qingfei Zeng ,&nbsp;Zhigang Mao ,&nbsp;Tao Xiang","doi":"10.1016/j.envres.2025.121184","DOIUrl":"10.1016/j.envres.2025.121184","url":null,"abstract":"<div><div>Cyanobacterial blooms can generate various toxic metabolites in freshwater, and pose serious threats to drinking water safety and human health. Although microcystins (MCs) have been detected in many freshwater ecosystems in China, little is known about the other cyanotoxins. An investigation of six eutrophic lakes (i.e. Hulun Lake, Wuliangsuhai Lake, Chaohu Lake, Taihu Lake, Xingyun Lake, and Dianchi Lake) in different geographical locations of China was performed during the summer of 2022 to determine the occurrence of various cyanotoxins (i.e. anatoxin-a (ATX), cylindrospermopsin (CYN), and MCs) in water column and their possible risks, and to evaluate the related environmental factors. MCs levels in sediment of these lakes were also investigated. MCs were the primary cyanotoxins in the water column of investigated lakes. The mean MCs contents in water column of Hulun Lake, Wuliangsuhai Lake, Chaohu Lake, Taihu Lake, Xingyun Lake, and Dianchi Lake were 3.61, 0.13, 3.60, 2.18, 0.57, and 2.56 μg/L, respectively. The total MCs levels in water column exceeded 1 μg/L in some areas of these lakes except Wuliangsuhai Lake. Replete nitrogen and/or phosphorus levels seemed to be related to MCs production. ATX can be detected in these lakes except Xingyun Lake at ng/L levels. CYN can be detected in all lakes at ng/L levels. However, the levels of ATX and CYN appear to be not significantly associated with environmental factors. MCs and CYN can pose a high or moderate risk for humans and aquatic organisms in some areas of these lakes, while ATX can pose a low or no risk for humans and aquatic organisms in most areas of these lakes. MCs can also be detected in sediment of all lakes at ng/g levels. This research emphasizes the necessity for long-term monitoring of different cyanotoxins in eutrophic lakes, and the implementation of nutrient control and management strategies.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121184"},"PeriodicalIF":7.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143472027","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}