Environmental Research最新文献

{"title":"Ocean acidification disrupts the energy balance and impairs the health of mussels (Mytilus coruscus) by weakening their trophic interactions with microalgae and intestinal microbiome","authors":"Xueqing Chang ,&nbsp;Jonathan Y.S. Leung ,&nbsp;Ting Wang ,&nbsp;Menghong Hu ,&nbsp;Youji Wang","doi":"10.1016/j.envres.2025.121493","DOIUrl":"10.1016/j.envres.2025.121493","url":null,"abstract":"<div><div>Despite extensive research in the last two decades, exploring the potential mechanisms underlying the sensitivity and resistance of marine organisms to ocean acidification is still imperative. Species interactions can play a role in these mechanisms, but the extent to which they modulate organismal responses to ocean acidification remains largely unknown. Here, we investigated how ocean acidification (pH 7.7) affects energy homeostasis and fitness of mussels (<em>Mytilus coruscus</em>) by assessing their physiological responses, intestinal microbiome and nutritional quality of their food (microalgae). Under ocean acidification, the mussels had reduced feeding rates by 34 % and reduced activities of digestive enzymes (pepsin by 39 %, trypsin by 28 % and lipase by 53 %) due to direct exposure to acidified seawater and increased phenol content of microalgae. Richness and diversity of intestinal microbiome (OTU, Chao1 index and Shannon index) were also lowered by ocean acidification, which can undermine nutrient absorption. On the other hand, energy expenditure of mussels increased by 53 % under ocean acidification, which was associated with the upregulation of antioxidant defence (SOD, CAT and GPx activities). Consequently, energy reserves in mussels decreased by 28 %, which were underpinned by the reduction in protein, carbohydrate and lipid contents. Overall, we demonstrate that ocean acidification could disrupt herbivore-algae and host-microbe interactions, thereby lowering the energy balance and impairing the health of marine organisms. This can have ramifications on the population and energy dynamics of marine communities in the acidifying ocean.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121493"},"PeriodicalIF":7.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741978","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":"Impacts of Biodegradable Microplastics on Rhizosphere Bacterial Communities of Arabidopsis thaliana: Insights into Root Hair-Dependent Colonization.","authors":"Keyi Chen, Zhihui Jin, Qing Zhu, Xiaodie Hu, Sijia Tian, Yulin Wang, Yaru Sun, Ming Yuan, Huaiying Yao","doi":"10.1016/j.envres.2025.121496","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121496","url":null,"abstract":"<p><p>Biodegradable microplastics (MPs) affect plant health by altering rhizosphere microbial communities. Root hairs create a unique niche for diverse microbes, but the effects of biodegradable MPs on root hair-dependent bacterial colonization are unclear, particularly the direct relationship between microbes in the rhizosphere and bulk soil. Here, the effects of polybutylene adipate terephthalate (PBAT) MPs on root hair-dependent bacterial colonization and diversity in the rhizosphere were revealed using an absolute quantitative method and in-situ zymography with two genotypes of Arabidopsis thaliana (long root hair, wild-type, WT and short root hair, rop2-1 mutant, ROP). The results showed that rhizosphere enzyme activity hotspots, bacterial diversity, and colonization increased from ROP to WT plants. PBAT MPs reduced root hair-dependent bacterial colonization and β-glucosidase hotspots by 17.1% and 9.8%, respectively. Despite increasing bacterial absolute abundance in both rhizosphere and bulk soil, PBAT MPs diminished bacterial community modularity and shifted bacterial life strategies from K- to r-strategy via elevated rRNA (rrn) copy numbers and copiotroph/oligotroph ratio. This study indicated that PBAT MPs decreased root hair-dependent bacterial colonization and diversity in the rhizosphere by altering the microbial life history strategies and increasing copiotrophic abundance. This study explained the effects of PBAT MPs on rhizosphere bacterial colonization and diversity from the perspective of root hairs.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121496"},"PeriodicalIF":7.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741966","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":"Enhanced Basalt Weathering for CO₂ Sequestration: Phase Dissolution Rates, Carbon Sequestration Mechanisms and Practical Application.","authors":"Xiaowei Tang, Hao Liu, Libing Liao","doi":"10.1016/j.envres.2025.121492","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121492","url":null,"abstract":"<p><p>Enhanced rock weathering, particularly using basalt, is a promising method for atmospheric CO₂ reduction. However, the complex mineral phases of basalt and challenges in post-application soil separation hinder experimental determination of phase-specific dissolution rates in real-world settings. This study innovatively combines magnetic separation and XRD-Rietveld full-spectrum fitting to isolate basalt from soil and quantify post-weathering phase changes. The normalized dissolution rates of labradorite, augite, hortonolite, ilmenite, and amorphous phases in soil were determined as 4.33×10^-6, 3.05×10^-5, 3.01×10^-5, 2.48×10^-5, and 1.73×10^-6 g m^-2 d^-1, respectively, with a carbon sequestration rate of 9.728 t ha^-1 a^-1. Weathering dynamics revealed early-stage decomposition of augite, hortonolite, and amorphous phases, while labradorite degraded predominantly in later stages. Dissolved cations either adhered to basalt particles, forming secondary phases (e.g., carbonates), or entered soil through adsorption, mineral formation, or leaching. Key weathering products included zeolite, hornblende, and serpentine. Furthermore, a comprehensive feasibility assessment for China highlighted practical considerations for carbon sequestration, land use, water demand, cost, and energy consumption. These findings underscore the critical role of enhanced basalt weathering in climate change mitigation strategies.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121492"},"PeriodicalIF":7.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741965","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":"Impact of land use on antibiotic resistance genes and bacterial communities in rivers","authors":"Jiaman Xiao ,&nbsp;Bowei Zhang ,&nbsp;Renbin Zhang ,&nbsp;Fei Xiong ,&nbsp;Hao Liu ,&nbsp;Zichen Xiang ,&nbsp;Yifu Wei ,&nbsp;Ming Xia ,&nbsp;Naicheng Wu","doi":"10.1016/j.envres.2025.121475","DOIUrl":"10.1016/j.envres.2025.121475","url":null,"abstract":"<div><div>River ecosystems support essential ecosystem functions and services, including supplying water for domestic, agricultural, and industrial activities, provisioning of hydropower and fisheries, supporting navigation and recreational activities, and regulating water quality. In recent decades, the presence and spread of antibiotic resistance genes (ARGs) have emerged as a key threat to ecosystem health and human well-being. Rivers that are surrounded by human-modified landscapes serve as primary repositories and sources of ARGs. However, our understanding of the relationship between the diversity of ARGs and land use remain limited. We collected 30 sediment samples from five rivers in Ningbo, China, and then classified the sampling sites into two groups (i.e., group A with low levels of human impacts and group B with intense human impact) based on land use in their upstream areas. In total, we found 31 types of ARGs and 148 phyla of bacteria in the samples. ARGs abundance had a positive relationship with the levels of anthropogenic activities, and exhibited significant difference between the two groups. Co-occurrence networks showed that the interrelationship between bacteria and ARGs was more complex in group B than in group A. Moreover, Structural Equation Modeling (SEM) revealed that anthropogenic activity not only posed direct effect on ARGs but also indirectly affected ARGs through bacteria. Our results underscore the profound impacts of land-use changes on the diversity of ARGs, bacteria communities, and their relationships, which highlight the need for integrating ARGs in river assessments in regions with human-dominated land use.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121475"},"PeriodicalIF":7.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738083","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":"Combined semi-continuous feeding and stripping: Improving volatile fatty acid production and sulfate reduction in a two-phase anaerobic sulfate reduction system","authors":"Sifang Wang ,&nbsp;Zerong Jiang ,&nbsp;Linan Zhao ,&nbsp;Kaoming Zhang ,&nbsp;Ziyao Chen ,&nbsp;Shilin Li ,&nbsp;Yu Miao ,&nbsp;Chun Hu ,&nbsp;Zhu Wang","doi":"10.1016/j.envres.2025.121485","DOIUrl":"10.1016/j.envres.2025.121485","url":null,"abstract":"<div><div>This study developed a two-phase anaerobic sulfate reduction system with semi-continuous feeding, integrated with vapor stripping, to assess its treatment performance at varying chemical oxygen demand (COD)/SO₄²⁻ ratios. At a COD/SO₄²⁻ ratio of 2, the system achieved high removal efficiencies of 91.85 % for COD and 92.70 % for sulfate, respectively. Vapor stripping effectively maintained low free H₂S concentrations, remaining below 50 mg/L in the first-phase reactor (Ra) and below 30 mg/L in the second-phase reactor (Rm). Additionally, the scouring effect of vapor stripping altered the functional group composition on the sludge surface, promoting the formation of sulfate-reducing granular sludge. Microbial analysis revealed a synchronized enrichment of <em>Desulfovibrio</em> and <em>Enterococcus</em> in Ra, as well as <em>Methanosaeta</em> and <em>Enterococcus</em> in Rm under a semi-continuous feeding regime combined with vapor stripping. Conductivity measurements and correlation analyses suggested that electroactive <em>Methanosaeta</em> and <em>Enterococcus</em> engaged in syntrophic metabolism via extracellular electron transfer, which was particularly beneficial for organic removal under low COD/SO₄²⁻ ratio conditions. At a COD/SO₄²⁻ ratio of 2, dissimilatory sulfate reduction (DSR) prevailed in Ra, whereas assimilatory sulfate reduction (ASR) dominated in Rm. This balance optimized sulfate removal efficiency while mitigating sulfide toxicity toward methanogens. Overall, this study presents a promising approach for the efficient treatment of high-sulfate organic wastewater with low COD/SO₄²⁻ ratio.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121485"},"PeriodicalIF":7.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143727225","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":"Better ecosystem resistibility but with severer risk deriving from potential pathogens and antibiotic resistances in marine sediments adjacent to Yellow River estuary under oil contamination","authors":"Yanlu Qiao ,&nbsp;Mingan Shen ,&nbsp;Lingbing Kong ,&nbsp;Yudi Sun ,&nbsp;Shuo Wang ,&nbsp;Yu Gao ,&nbsp;Jianliang Xue ,&nbsp;Qing Jiang ,&nbsp;Dongle Cheng ,&nbsp;Yuyang Liu","doi":"10.1016/j.envres.2025.121486","DOIUrl":"10.1016/j.envres.2025.121486","url":null,"abstract":"<div><div>Estuaries, a vital coastal system, exhibit extensive anthropogenic impacts on their ecological integrity. However, little is known about microbial responses and associated risks in marine sediments around Yellow River estuary (YRE) at an outbreak of oil pollution. Herein, via molecular sequencing and physicochemical experiments, the characteristics of microbiota, potential pathogens and antibiotic resistance were comprehensively investigated in sediments collected from three areas with varying distances to YRE at diesel-polluted microcosms. Specifically, higher stability, stronger stochasticity-dominated assembly processes and more abundant petroleum metabolic pathways were observed in bacterial community nearest to the estuary (YE). Furthermore, an enrichment of potential pathogens and antibiotics resistance genes (ARGs), those mainly related to multidrug-resistance efflux pumps, as well as the accelerated dissemination of ARGs, all were found across all regions along the pollution time, especially those in YE. Several core pathogens (e.g., <em>Pseudomonas</em>) were simultaneously related with multidrug resistances and their transmissions, and a more robust relationship among them was found in YE. Culturable experiments demonstrated numerous potential pathogens were capable of efficiently degrading oil contaminants. A global investigation revealed the sediment pathogens with oil degradation potential were widely distributed in shallow- and deep-sea water bodies, with higher abundance in coastal zones, suggesting extensive pathogenic risks from these bacteria also in oil-polluted aquatic environments. Altogether, the findings unmask the sound resistibility but with serious hazard of potential pathogens and antibiotic resistance in oil-contaminated sediment ecosystem nearest to YRE, and offer novel insights and potential targets for estuarine risk assessment and control.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121486"},"PeriodicalIF":7.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715687","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":"Oil spill cleanup related exposures to benzene, toluene, ethylbenzene, xylenes, and n-hexane and incident diabetes mellitus","authors":"Hanna V. Jardel ,&nbsp;Alexander P. Keil ,&nbsp;Chantel L. Martin ,&nbsp;David B. Richardson ,&nbsp;Mark R. Stenzel ,&nbsp;Patricia A. Stewart ,&nbsp;Kate E. Christenbury ,&nbsp;Lawrence S. Engel ,&nbsp;Dale P. Sandler","doi":"10.1016/j.envres.2025.121487","DOIUrl":"10.1016/j.envres.2025.121487","url":null,"abstract":"<div><h3>Background and objectives</h3><div>Exposure to benzene, toluene, ethylbenzene, xylenes, and n-hexane (BTEX-H) may contribute to the development of diabetes. Oil spill response and cleanup (OSRC) workers are exposed to BTEX-H but there are few relevant studies. We studied incident diabetes over 10 years of follow-up among OSRC workers.</div></div><div><h3>Methods</h3><div>This analysis includes 21,726 participants (82.2 % male, mean age 39.9 years; 66.5 % White race) in the Gulf Long-term Follow-up Study – a prospective cohort of <em>Deepwater Horizon</em> (<em>DWH</em>) oil spill OSRC workers followed from 2011 to 2013 through 2021. Individual estimates of cumulative work-related exposures to specific BTEX-H chemicals and an aggregate sum (total BTEX-H) were derived from a job-exposure matrix that linked exposure group estimates derived from exposure measurements to self-reported <em>DWH</em> work histories. We used Cox models to estimate associations of quartiles of exposure to individual BTEX-H chemicals and total BTEX-H with diabetes incidence. We used quantile-based g-computation, quantifying associations with exposure to the BTEX-H chemicals, treating them as separate components in a mixture. We examined differences in associations by neighborhood disadvantage using the Area Deprivation Index (ADI) and by self-classified race in stratified analyses.</div></div><div><h3>Results</h3><div>Exposure to the BTEX-H chemicals was associated with diabetes, with elevated hazard ratios for third and fourth quartiles of exposure compared to the first quartile. For example, total BTEX-H, Q3 and Q4 HRs were 1.10 95 %CI (0.91, 1.33) and 1.27 95 %CI (1.05, 1.53), respectively. The HR associated with a three-quartile increase in the BTEX-H mixture was 1.31 95 %CI (1.07, 1.59). Stratified analyses showed little variation by race and suggestions of variation by ADI.</div></div><div><h3>Conclusion</h3><div>Exposures to BTEX-H chemicals were associated with incident diabetes among OSRC workers for the individual BTEX-H chemicals, total BTEX-H, and the BTEX-H mixture. The range of exposures in this study make these findings relevant to other low to moderate exposure settings.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121487"},"PeriodicalIF":7.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741981","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":"Breakthrough in Plasmonic Enhanced MOFs: Design, Synthesis, and Catalytic Mechanisms for Various Photocatalytic Applications.","authors":"Waqar Ahmad Qureshi, Syed Najeeb-Uz-Zaman Haider, Muhammad Adnan Qaiser, Shahid Khan, Weikang Wang, Rai Nauman Ali, Amjad Ali, Ahmad Naveed, Mohamed Hussein Abdurahman, Muhammad Usman Khan, Muhammad Tayyab, Lele Wang, Balal Yousaf, Qin Qin Liu, Juan Yang","doi":"10.1016/j.envres.2025.121257","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121257","url":null,"abstract":"<p><p>Integrating metal-organic framework MOFs with plasmonic nanoparticles (NPs) addresses a significant shortcoming of standard plasmonic platforms: their low efficacy with non-adsorbing compounds. The corporation of porous MOFs complements the plasmonic characteristics, allowing for a broader range of applications. This study highlights recent advancements in the design, synthesis, structural engineering, and functional properties of heterostructures combining plasmonic NPs with MOFs, focusing on their plasmonic and catalytic reaction behaviors. These developments have greatly enhanced the protentional of plasmonic NPs-MOFs heterojunction in nanofabrication and various applications, such as chemical sensing techniques like localized surface plasmon resonance (LSPR) surface-enhanced Raman scattering (SERS) and surface-enhanced infrared absorbance (SEIRA). Additionally, the study thoroughly examines the interface interaction and photocatalytic performance of plasmonic NPs-MOFs. Various practical applications of plasmonic NPs-MOFs heterojunction are explored, including their promising role in tackling environmental challenges like industrial water pollution. Furthermore, we have a detailed discussion of various photocatalysis processes, including water splitting, CO₂ reduction, pollutant degradation, and various sensing applications. Identifying current limitations and outlining future research directions to bridge existing knowledge gaps, including interface interaction, photocatalytic performance, and practical applications providing a comprehensive understanding, are the main aims of this review to inspire the development of next-generation plasmonic NPs-MOFs materials. It concludes by discussing future directions and challenges in composite development, emphasizing their potential to provide sustainable and efficient solutions for environmental remediation and energy conversion.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121257"},"PeriodicalIF":7.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143727194","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":"Corrigendum to ‘Neurodevelopmental and behavioural effects of waterborne selenite in larval zebrafish (Danio rerio)’ [Environ. Res. 273 (2025) 121240]","authors":"Md Helal Uddin ,&nbsp;Jinnath Rehana Ritu ,&nbsp;Douglas P. Chivers ,&nbsp;Som Niyogi","doi":"10.1016/j.envres.2025.121463","DOIUrl":"10.1016/j.envres.2025.121463","url":null,"abstract":"<div><div>Selenium (Se) is an essential element that becomes highly toxic to fish at elevated exposure levels. Although the neuro-behavioural effects of organic Se are well documented in adult fish, the effects of inorganic Se (selenite) on neurodevelopment and behaviour, particularly in early life stages, remain poorly understood. In this study, zebrafish embryos were exposed to different environmentally relevant concentrations of waterborne Se (0 (control), 10, 50, 100 μg/L; as selenite) from 4 hours post-fertilization to 30 days post-fertilization. We evaluated neurodevelopmental and behavioural outcomes, along with oxidative stress as a potential mechanism of selenite neurotoxicity. Fish larvae exposed to higher Se concentrations (50 and 100 μg/L) exhibited significant behavioural impairments, including reduced thigmotaxis and reflexive movement, spent significantly less time (60 %) near their conspecifics, and lower exploratory response (1.5 fold) to the novel object. These behavioural deficits were associated with elevated oxidative stress, as indicated by increased (5.4 fold) DCF-DA fluorescence intensity and dysregulation (0.6–6.4 fold change) of key antioxidant genes. Additionally, selenite exposure led to increased apoptotic cell death (p &lt; 0.001), and reduced length (16 %) and weight (33–47 %) of zebrafish larvae in 50 and 100 μg/L Se exposure groups compared to the control group. Neurodevelopmental disruptions were evident through altered expression of dopaminergic (<em>mao, th1, otpa</em>; all p &lt; 0.05) and serotonergic (<em>tph2, pet1, 5ht2c</em>; all p &lt; 0.05) pathway genes, critical regulators of behaviour in fishes. Overall, our findings suggest that selenite-induced oxidative stress and neurodevelopmental gene dysregulation contribute to the observed behavioural impairments in developing zebrafish, highlighting the potential risks of Se exposure during early life stages.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"274 ","pages":"Article 121463"},"PeriodicalIF":7.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716291","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":"Magnetic biochar-supported nanoscale zero-valent iron for remediation of arsenic and cadmium-contaminated soils: The role of free radicals","authors":"Huanhuan An ,&nbsp;Ting Liu ,&nbsp;Xiao Xiao ,&nbsp;Mengting Liu ,&nbsp;Yi Hu ,&nbsp;Pangzhi Wei ,&nbsp;Weipeng Yao ,&nbsp;Xiao Tang ,&nbsp;Yongkang Lai ,&nbsp;Xubiao Luo ,&nbsp;Shenglian Luo","doi":"10.1016/j.envres.2025.121484","DOIUrl":"10.1016/j.envres.2025.121484","url":null,"abstract":"<div><div>Remediating arsenic (As) and cadmium (Cd) in soils through immobilization faces challenges, primarily in isolating amendments from soil. While previous studies have focused on altering heavy metal speciation, they have not reduced total metal content, risking reactivation and secondary contamination. This study synthesized and characterized magnetic biochar loaded with nanoscale zero-valent iron (nZVI-MBC), which uses magnetic separation to decrease As and Cd levels in soil, offering a potential permanent solution for contaminant removal. The ability of nZVI-MBC to stabilize As and Cd in soil was evaluated. The results demonstrate that nZVI-MBC reduced total As and Cd content by 13.7 % and 12.3 %, respectively, and decreased their bioavailability by 34.1 % and 93.2 %, converting these metals into more stable forms. Post-treatment, increases in soil pH, cation exchange capacity, and organic matter were observed, along with enhanced soil enzyme activity. The stabilization mechanisms included electrostatic attraction, surface adsorption, complexation, and co-precipitation. Moreover, nZVI-MBC promoted the generation of hydroxyl radicals (•OH) and environmentally persistent free radicals (EPFRs), which facilitated the oxidation of As(III) to As(V), thereby reducing As migration. This study confirms that nZVI-MBC is a promising soil amendment for effective heavy metal remediation.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121484"},"PeriodicalIF":7.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726116","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}