Environmental Research最新文献

{"title":"SnS₂ integrated P-Doped g-C₃N₄ with advanced photocatalytic efficiency towards organic pollutants decontamination.","authors":"Monika Kumari, Naveen Kumar, Raj Kishore Sharma, Muhammad Tahir, Manickam Selvaraj, Pardeep Singh, Jitender Jindal, Anuj Mittal","doi":"10.1016/j.envres.2025.121210","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121210","url":null,"abstract":"<p><p>In this study, the P doping and SnS₂ deposition was controlled to get SnS₂ integrated P-doped g-C₃N₄ photocatalysts. The prepared photocatalysts were analyzed by XRD, FESEM, HRTEM, PL, UV-DRS, XPS, and Zeta potential emphasizing their crystalline structures, morphological characteristics, charge carrier recombination, band gap energies, chemical compositions, and surface charge. These results confirmed successful P doping by substituting C and formation of heterojunction with SnS₂. Synthesized materials exhibited good photodegradation efficiency towards organic pollutants: the antibiotic ciprofloxacin (CP) and the cationic dye Rhodamine B (RhB). Among the optimized composites, PCSn-5 (containing 5 wt% of SnS₂ on PCN-2, 1mmol P doped g-C₃N₄) achieved the highest degradation rates, achieving 99.45% degradation of RhB within 100 min and 89.44% degradation of CP within 120 min. P doping introduced new energy levels that significantly enhanced charge separation and heterojunctions formed improved light absorption, thereby enhancing photocatalytic efficiency. Scavenger analysis acknowledge that holes were primarily responsible for RhB degradation, while in CP degradation both superoxide radicals and holes were dominant species. The photocatalytic efficiency of PCSn-5 was assessed at various pH levels exhibited the peak performance at pH 3 for RhB and at neutral pH for CP. The photocatalyst exhibited strong stability with 2% reduction in efficiency after five cycles for both pollutants. Electrochemical analysis, conducted through Mott-Schottky plots and electrochemical impedance spectroscopy (EIS), revealed increased donor density and reduced charge resistance following the formation of the composites.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121210"},"PeriodicalIF":7.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143522225","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":"Repurposing and reusing aquaculture wastes through a biosecure microfloc technology.","authors":"Sayima Majeed Wani, Anayitullah Chesti, Saima Rehman, Vipin Chandra Nautiyal, Irfan Ahmad Bhat, Irshad Ahmad","doi":"10.1016/j.envres.2025.121214","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121214","url":null,"abstract":"<p><p>Intensive aquaculture waste management is a significant challenge in the aquaculture industry, often contributing to environmental issues. Intensive aquacultural techniques demand new strategies and alternatives aimed to achieving sustainability. Repurposing and reusing wastes through innovative technologies can mitigate their negative impact. Biofloc technology (BFT) or bio-colloidal technology is based on the concept of aquaculture waste utilization by heterotrophic microbial biomass and presents a biosecure and sustainable solution. The dynamics of BFT are shaped by ecological interactions like commensalism, competition, and predation, forming a trophic micro-network consisting of rotifers, ciliates, heterotrophic bacteria, and microalgae. Metagenomic studies showed dominance of microbial communities within the biofloc, such as Cyanobacteria, Nitrosomonas, Proteobacteria, Bacteroidetes, Pseudomonadota, Rhodobacteraceae and Bacillus species that play a crucial role in the mineralization and bioremediation of waste. These microbes also help to break down hazardous toxic compounds into non-toxic, beneficial nutrients, which are subsequently utilized as food by fish and shellfish. Also by recycling waste reduces pollution, improves water quality, and enhances the efficiency of aquaculture system. With increasing incidences of microbial diseases and growing expenses for energy, biosecurity with BFT seems, by all means a sustainable production method for aquaculture. The incorporation of biosecure biofloc technology into aquaculture practices enhances environmental sustainability while optimizing resource use, creating more eco-friendly and cost-effective systems. This review highlights key aspects such as the microbial dynamics, role of metagenomics in identifying the bacterial communities, bioremediation of aquaculture waste, biosecurity concerns, and the biocontrol of pathogenic microbes across various biofloc systems.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121214"},"PeriodicalIF":7.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143522167","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":"In vitro assessment of aryl hydrocarbon, estrogen, and androgen receptor-mediated activities of secondary organic aerosols formed from the oxidation of polycyclic aromatic hydrocarbons and furans","authors":"Abd El Rahman El Mais ,&nbsp;Barbara D'Anna ,&nbsp;Alexandre Albinet ,&nbsp;Selim Aït-Aïssa","doi":"10.1016/j.envres.2025.121220","DOIUrl":"10.1016/j.envres.2025.121220","url":null,"abstract":"<div><div>Biomass burning constitutes a significant source of fine particulate matter (PM_2.5) in the atmosphere, particularly during winter due to residential wood heating. This source also emits substantial quantities of volatile and semi-volatile organic compounds, leading through (photo-)chemical and physical processes, to the formation of secondary organic aerosols (SOAs), accounting for a significant fraction of PM_2.5. The current understanding of the biological effects of SOA resulting from the oxidation of major gaseous precursors emitted by biomass burning (e.g., polycyclic aromatic hydrocarbons (PAHs), phenols, furans) is still limited. Mechanism-based <em>in vitro</em> cellular bioassays targeting toxicologically relevant modes of action have proven valuable in assessing and quantifying the overall biological activity of complex mixtures like SOA, thereby revealing the presence of toxicologically relevant compounds. The main objective of this study was to investigate, using a battery of <em>in vitro</em> mechanism-based cellular bioassays, the aryl hydrocarbon (AhR), estrogen (ER), and androgen receptor (AR)-mediated activities of laboratory-generated SOA resulting from the oxidation of four PAHs and three furans. SOA was produced using an oxidation flow reactor (OFR) under either daytime (OH radicals) or nighttime (NO₃ radicals) conditions. Furan-derived SOA did not exhibit any biological activity with the targeted endpoints. PAH-derived SOA, formed from AhR weakly or inactive PAHs, showed significant AhR-mediated activities. Notably, SOA resulting from naphthalene and acenaphthylene + acenaphthene demonstrated the highest AhR activation potency, with greater activities observed for SOA formed through NO₃ radical oxidation. No endocrine-disrupting activity was observed for the PAH-derived SOA, similar to the individual parent PAHs (with the exception of fluorene and phenanthrene PAHs which were weekly anti-androgenic). These findings underscore the substantial contribution of PAH-derived SOA to the AhR-mediated activities of PM.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121220"},"PeriodicalIF":7.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143514208","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":"Spatial estimation of veterinary antibiotics from husbandry to soil to river with resistance risk assessment in urban agglomerations","authors":"Nuo Cheng,&nbsp;Jing Wang,&nbsp;Hongguang Cheng,&nbsp;Xuewei Wang","doi":"10.1016/j.envres.2025.121212","DOIUrl":"10.1016/j.envres.2025.121212","url":null,"abstract":"<div><div>The rapid development of husbandry has increased veterinary antibiotic pollution risks, making emission reduction essential for sustainable growth. This study presents a novel method to quantitively explore antibiotic pathways from livestock to soils and then to rivers at grid scale in the Shandong Peninsula urban agglomeration. Validation demonstrated the method can relatively precisely and accurately estimate the spatial distributions and transports of veterinary antibiotics compared to previous methods and observations. Random Forest model yielded robust livestock distribution estimates (R² &gt; 0.945 for internal cross-validation, R² &gt; 0.652 for external validation), with the concentration of bovine, swine, and poultry in the west of the study area. In addition, the spatial distributions of nighttime light index and cropland cover were significantly correlated to the livestock distribution. The spatial distribution of antibiotics in soils followed the livestock distribution pattern, mainly driven by poultry and bovine framing. The estimation of antibiotic loads to rivers, based on sand transport and surface runoff, demonstrated moderate to high accuracy with R² = 0.377 for sulfadiazine (SDZ) and R² = 0.602 for ciprofloxacin (CFX). Antibiotic loads to soils primarily determined its loads to rivers which accounted for only 1.24%–2.68% of total antibiotic loads. Fluoroquinolone levels were one to two orders of magnitude higher than sulfonamide levels. Resistance risks were in the moderate to high for CFX and enrofloxacin (EFX) in a few rivers, while SDZ and sulfamonomethoxine (SMM) had low risks for all rivers. This refined method provides valuable insights for managing livestock-related pollution and offers a scientific basis for regional pollution control, with potential applications in the regions facing similar challenges, such as data scarcity of the soil physicochemical properties.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121212"},"PeriodicalIF":7.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143514213","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":"Soil resource availability regulates the response of micro-food web multitrophic interactions to heavy metal contamination","authors":"Yanbin Du ,&nbsp;Caihong Yu ,&nbsp;Zhanghan Sun ,&nbsp;Yijia Liu ,&nbsp;XiaoXia Liu ,&nbsp;Yang Feng ,&nbsp;Hongting Wang ,&nbsp;Jie Zhou ,&nbsp;Xianhong Li","doi":"10.1016/j.envres.2025.121222","DOIUrl":"10.1016/j.envres.2025.121222","url":null,"abstract":"<div><div>The effects of heavy metal contamination on soil biomes have been of considerable interest. However, the effects of heavy metal pollution on the interactions between soil multi-trophic biota in soil food webs and the regulatory mechanisms still need more research, especially in different soil situations. This study examined the impact of heavy metal contamination on soil micro-food web in two distinct soil resource availability situations. Under low soil resources availability situation, heavy metals mainly affected the community structure of soil bacteria and nematodes, with the number of edges of the bacterial network and network complexity reduced by 60.5% and 187%, respectively. In addition, the presence of heavy metals led to a significant reduction in the energy flow from soil resources to bacterivores in the nematode food web. For micro-food webs, heavy metal contamination increased the network average degree by 18.8% and 11.56% in the low and high resource availability situations, respectively. However, in high soil resource availability, heavy metal contamination decreased micro-food web stability and eased competitive relationships among multitrophic organisms and increased microbial carbon limitation and mitigates nitrogen limitation. In low soil resource availability, it increased network stability and shifted relationships among micro-food web organisms from cooperative to competitive and decreased microbial carbon limitation and aggravated nitrogen limitation. This study offers new research insights into the feedback discrepancy between resource availability and pollution stress from the perspective of multitrophic level interactions and further deepens the understanding of the environmental impacts of heavy metal pollution at the ecosystem level.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121222"},"PeriodicalIF":7.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511674","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":"Polyhalogenated carbazoles contamination in East China Sea sediments: Spatial distribution, source apportionment, and ecological risk assessment","authors":"Li-Xin Kou ,&nbsp;Xiao-Yu Zhang ,&nbsp;Zi-Cen Zuo ,&nbsp;Na Liu ,&nbsp;Zhen He ,&nbsp;Gui-Peng Yang","doi":"10.1016/j.envres.2025.121219","DOIUrl":"10.1016/j.envres.2025.121219","url":null,"abstract":"<div><div>Polyhalogenated carbazoles (PHCZs), an emerging class of halogenated organic pollutants, have been widely detected in various environmental media, including sediments, soil, air, and organisms. The East China Sea (ECS) is a vital region for marine and fishery resource development in China, yet research on the pollution levels and sources of PHCZs in its sediments remains limited. This study reports the occurrence of seven PHCZs in the surface sediments of the ECS, with detection rates exceeding 90%. The concentrations of Σ₇PHCZs ranged from 3.5 to 27 ng/g, with an average of 9.9 ng/g. The predominant congeners were 1368-BCZ and 3-ICZ. The sources of PHCZs included a non-specific source transported via terrestrial runoff (39%), industrial wastewater discharge (35%), and optoelectronic material pollution (26%), as identified by the positive matrix factorization model. The ecological risk assessment, based on TEQ, indicated a range of 0.18–5.0 pg TEQ/g across the study area. These findings highlight the potential ecological concerns associated with PHCZs in the ECS and emphasize the need for enhanced environmental monitoring and source mitigation efforts to reduce their potential environmental impacts.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121219"},"PeriodicalIF":7.7,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497758","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":"Simultaneous elimination of cationic dyes from water media by carboxymethyl cellulose-graft-poly(acrylamide)/magnetic biochar nanocomposite hydrogel adsorbent","authors":"Seyed Jamaleddin Peighambardoust ,&nbsp;Baharak Fakhiminajafi ,&nbsp;Parisa Mohammadzadeh Pakdel ,&nbsp;Hamidreza Azimi","doi":"10.1016/j.envres.2025.121150","DOIUrl":"10.1016/j.envres.2025.121150","url":null,"abstract":"<div><div>In this work, the grafting of acrylamide onto CMC was performed by a free radical polymerization method to prepare hydrogel for the elimination of single and simultaneous methylene blue (MB) and methyl violet (MV) -as common textural dyes-from water. Biochar (CL) and magnetic biochar of Luffa Cylindrica (CL-Fe₃O₄) were integrated into the hydrogel matrix to promote removal performance. CL was prepared using the pyrolysis method and modified using Fe₃O₄ magnetic nanoparticles by a co-precipitation method. Infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and vibration sample magnetometry (VSM) analysis were applied to characterize prepared adsorbents. The maximum removal of single MB and MV occurred at a pH of 9, temperature of 25 °C, adsorbent dose of 1.5 g/L, initial concentration of 10 mg/L, and contact time of 60 min. The maximum removal efficiency under the optimal conditions was determined to be 83.11, 92.89 and 95.01% for single adsorption of MB, 76.09, 85.91 and 90.11% for single adsorption of MV, 66.96, 76.48 and 80.02% for simultaneous adsorption of MB and 60.04, 69.91 and 75.28% for simultaneous adsorption of MV by CMC-g-poly(AAm), CMC-g-poly(AAm)/CL, and CMC-g-poly(AAm)/CL-Fe₃O₄, respectively. The kinetic and isotherm studies revealed that the pseudo-second-order kinetic model and the Langmuir isotherm model aligned more with the experimental data. Thermodynamic studies showed that the adsorption of dyes takes place spontaneously and exothermically. Therefore, CMC-g-poly(AAm)/CL-Fe₃O₄ nanocomposite hydrogel could be used for wastewater treatment applications.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121150"},"PeriodicalIF":7.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143490163","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 life imidacloprid and copper exposure affects the gut microbiome, metabolism, and learning ability of honey bees (Apis mellifera)","authors":"Xijie Li ,&nbsp;Qihe Tang ,&nbsp;Mengshang Hou ,&nbsp;Yantao Pang ,&nbsp;Dan Li ,&nbsp;Yajuan Chen ,&nbsp;Richan Fang ,&nbsp;Yi Deng ,&nbsp;Jun Zhang ,&nbsp;Chonghui Zhao ,&nbsp;Junjie Li ,&nbsp;Yuan Chen ,&nbsp;Yazhou Zhao ,&nbsp;Jun Guo ,&nbsp;Kai Qian","doi":"10.1016/j.envres.2025.121134","DOIUrl":"10.1016/j.envres.2025.121134","url":null,"abstract":"<div><div>The pesticide imidacloprid and the heavy metal copper provide some degree of protection to plants, while at the same time causing varying degrees of damage to bees. However, few studies have investigated the negative effects of imidacloprid and copper exposure on newly emerged bees (young bees), especially when both are present in a mix. In this study, young bees were exposed to sterile sucrose solutions containing imidacloprid (10 μg/L, 100 μg/L), copper (10 mg/L, 50 mg/L), or a mix of both (10 μg/L + 10 mg/L) for 5 days to assess their gut system and behavior, with survival and dietary consumption recorded over 21 days. We found that imidacloprid and copper reduced honeybee survival, dietary intake, and learning ability, decreased gut microbiota diversity, and caused metabolic disruptions. Notably, the mix of imidacloprid and copper had a synergistic negative effect. Correlation analyses revealed that the honeybee gut microbiota influences bee immunity and behavior by regulating metabolic pathways related to ascorbate, tryptophan, and carbohydrates. Our results demonstrate that imidacloprid and copper, either alone or in a mix, alter young bee health through a complex mechanism of toxicity. These findings highlight imidacloprid and copper's negative effects on young honeybees, offering insights for future pesticide and heavy metal impact research.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121134"},"PeriodicalIF":7.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143490124","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":"Meta-analysis of endocrine-disrupting chemical effects on earthworm functional traits","authors":"Guo Chen ,&nbsp;Jingyuan Fan ,&nbsp;Ying Xu ,&nbsp;Pinjie Su ,&nbsp;Mengyao Yao ,&nbsp;Xinyue He ,&nbsp;Chenxi Zhang ,&nbsp;Cheng Zhang ,&nbsp;Peng Gao ,&nbsp;Lusheng Zhu","doi":"10.1016/j.envres.2025.121208","DOIUrl":"10.1016/j.envres.2025.121208","url":null,"abstract":"<div><div>Endocrine-disrupting chemicals (EDCs) are ubiquitous emerging environmental contaminants. However, the comprehensive impact of EDCs on soil ecosystems, particularly on the model organism <em>Eisenia fetida</em>, remains inadequately understood due to disparate experimental and assessment methods. A meta-analysis was conducted to analyze the effects of EDCs on earthworm functional traits, including survival, behavior, growth, reproduction, and cellular responses. The analysis revealed that EDCs significantly impaired earthworm survival (−17.5%, <em>p</em> &lt; 0.05), behavior (−62.2%, <em>p</em> &lt; 0.001), growth (−11.5%, <em>p</em> &lt; 0.001), and reproduction (−36.7%, <em>p</em> &lt; 0.001). EDCs induced substantial oxidative stress, evidenced by a 36.5% (<em>p</em> &lt; 0.001) increase in reactive oxygen species (ROS) production and elevated oxidative damage. The antioxidant defense system showed compensatory activation, with enhanced superoxide dismutase (10.0%) and catalase (8.90%) activities and glutathione levels (23.3%) (<em>p</em> &lt; 0.001). The present study found chemical-specific toxicity patterns with heavy metals causing the most severe effects on behavior and reproduction. Toxicity profiles varied with exposure concentration and duration, revealing complex dose-response and temporal relationships. These findings provide crucial insights for the ecological risk assessment of EDCs and establish a foundation for developing targeted mitigation strategies. Furthermore, the findings highlight the importance of taking multiple endpoints into account when evaluating the toxicity of EDCs and suggest possible directions for future research.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121208"},"PeriodicalIF":7.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481926","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":"Self-modified iron-based materials for efficient chromium (VI) removal: Efficacy and mechanism","authors":"Minxian Peng ,&nbsp;Min Gan ,&nbsp;Xinyi Zhao ,&nbsp;Jianyu Zhu ,&nbsp;Ke Zhang","doi":"10.1016/j.envres.2025.121193","DOIUrl":"10.1016/j.envres.2025.121193","url":null,"abstract":"<div><div>Hexavalent chromium (Cr(VI)) is a typical carcinogenic contaminant, and the prerequisite for its efficient remediation is the low-cost and high-efficiency removal materials. Thus, in this study, we propose an outstanding Cr(VI) removal iron-based materials derived from the self-modification of secondary minerals by simple pyrolysis and explore their Cr(VI) removal mechanism. The resulting materials, C-AJ (from ammoniojarosite) and C-Jar (from jarosite) exhibited excellent Cr(VI) removal efficiencies, with maximum Cr(VI) removal capacities of 96.9 mg/g and 70.7 mg/g, respectively. Their excellent Cr(VI) removal capacities are mainly attributed to the self-modification of two minerals to form Fe(II) and the retained SO₄^2-, and the N escape of ammoniojarosite [(NH₄, H₃O)Fe₃(OH)₆(SO₄)₂] further promotes the formation of active sites and brings higher Cr(VI) removal ability. Moreover, C-AJ and C-Jar have similar Cr(VI) removal mechanisms involving reduction and absorption. The reduction process, primarily driven by Fe(II), contributes significantly, while the adsorption process, mainly influenced by sulfate, plays a minor role. In addition, the iron-based material exhibits high resistance to interference from pH changes, maintains strong Cr(VI) removal ability in the presence of anions and organic acids, and does not pose a risk of secondary pollution. This study demonstrates that simple pyrolysis of iron-based minerals can induce self-modification, resulting in highly active Cr(VI) removal materials, which presents a potential low-cost and efficient Cr(VI) remediation solution.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121193"},"PeriodicalIF":7.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143490149","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}