Journal of Hazardous Materials最新文献

{"title":"Tissue distribution of ultraviolet absorbents and industrial antioxidants in Atlantic walruses (Odobenus rosmarus rosmarus) and ringed seals (Pusa hispida) from the Canadian Arctic: Influence of sex, body size, and spatial variation","authors":"Ingrid-Alejandra Granados-Galvan ,&nbsp;Jennifer F. Provencher ,&nbsp;Mary Gamberg ,&nbsp;Magali Houde ,&nbsp;Steven H. Ferguson ,&nbsp;Mark L. Mallory ,&nbsp;Cory J.D. Matthews ,&nbsp;Zhe Lu","doi":"10.1016/j.jhazmat.2025.140121","DOIUrl":"10.1016/j.jhazmat.2025.140121","url":null,"abstract":"<div><div>UV absorbents and industrial antioxidants are contaminants of emerging concern. However, their tissue distribution in marine mammals remains poorly characterized. This study investigated the tissue distribution of benzotriazole UV stabilizers (BZT-UVs), organic UV filters (UVFs), 2,6-di-<em>tert</em>-butylphenol (26DTBP), and aromatic secondary amines (Ar-SAs) in Atlantic walrus (<em>Odobenus rosmarus rosmarus</em>) (blubber, muscle, and liver) and ringed seal (<em>Pusa hispida</em>) (blubber and liver) tissues collected around several communities in the Canadian Arctic. In both species, blubber accumulated higher levels of BZT-UVs than other tissues, whereas some UVFs, such as benzophenone and 2-hydroxy-4-methoxybenzophenone (BP3), accumulated more in the muscle or liver of walruses. ∑BZT-UVs in male walrus blubber correlated positively with body length, demonstrating a bioaccumulation trend as individuals grew larger. This contrasts with the evidence of growth dilution observed for ∑UVFs in male walrus liver, and for BP3 and 26DTBP in female ringed seal blubber. Both species exhibited spatial variation in UV absorbent concentrations. This study provides the first data on the tissue distribution of these contaminants in Arctic marine mammals, revealing tissue-, spatial-, sex-, and compound-specific distribution patterns. The findings offer current reference data to support environmental monitoring, risk assessment, and management efforts, particularly for species important to northern Indigenous communities.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140121"},"PeriodicalIF":11.3,"publicationDate":"2025-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"A new framework integrating crop growth–level IV fugacity model and eco-indicator sensitivity to assess neonicotinoid fate and ecological risk in tropical rice–vegetable rotations","authors":"Huadong Tan ,&nbsp;Xinyu Hu ,&nbsp;Linxia Zhang ,&nbsp;Yiru Chen ,&nbsp;Rong Hao ,&nbsp;Zhenzhen Wang ,&nbsp;Chunyuan Wu ,&nbsp;Xiaoying Zhang ,&nbsp;Xiao Deng ,&nbsp;Yi Li ,&nbsp;Lin Wu ,&nbsp;Yi Zhang","doi":"10.1016/j.jhazmat.2025.140098","DOIUrl":"10.1016/j.jhazmat.2025.140098","url":null,"abstract":"<div><div>Tropical rice–vegetable rotations face escalating pesticide management challenges due to alternating wet–dry conditions, high neonicotinoid (NEO) input, and complex multimedia transport, yet existing models overlook dynamic crop growth and rotation-specific risks. To address this, we constructed an innovative pesticide assessment framework by combining continuous crop growth curve–level IV fugacity model (CGC-L4F) and eco-indicator sensitivity distribution (Eco-SD) to predict the fate and ecological risks of NEOs in multimedia of tropical rice–vegetable rotation systems. Applying the framework to imidacloprid, acetamiprid, and their shared transformation product 6-chloronicotinic acid (6-CNA) in four field-applied rice–vegetable rotation systems revealed that NEOs and 6-CNA concentrations in multimedia decreased by 1.13–5.67 times from vegetable to rice growth period, primarily attributed to NEOs input, crop rotation, and plant growth. Crop rotation pattern and crop volume exacerbated NEO heterogeneity of distribution and transport within and between multimedia, causing easy accumulation in water and plants from soil. The CGC-L4F model consistently simulated temporal variations with strong statistical fit (<em>R</em>² &gt; 0.7) and acceptable deviation (±1 log unit). The Eco-SD approach, incorporating ecosystem service providers, successfully identified media-specific and seasonally differentiated risk patterns. This framework, focusing on dynamic crop growth and ecosystem services, is the first to quantify NEOs’ temporal fate and risks in rotation systems, demonstrating that integrated modeling offers robust predictive capacity despite inherent uncertainties.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140098"},"PeriodicalIF":11.3,"publicationDate":"2025-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Pipe material significantly affected microbial regrowth and potential risks in reclaimed water distribution systems","authors":"Yuan Bai ,&nbsp;Song Xue ,&nbsp;Yinhu Wu ,&nbsp;Haobin Wang ,&nbsp;Ruining Wang ,&nbsp;Lu Chang ,&nbsp;Zhuo Chen ,&nbsp;Hongying Hu","doi":"10.1016/j.jhazmat.2025.140116","DOIUrl":"10.1016/j.jhazmat.2025.140116","url":null,"abstract":"<div><div>Secondary pollution and microbial risks pose significant challenges to reclaimed water distribution systems (RWDSs). This study conducted 140 d investigations on temporal variations in water characteristics, microbial regrowth and communities in RWDSs with different pipe materials, including ductile iron (DI), cement mortar lined ductile iron (CI), polyethylene (PE), and Q235B carbon steel (CS). It was demonstrated that microbial community was significantly influenced by bacterial phase. <em>Candidatus_Kaiserbacteria</em>, <em>Legionella</em> and <em>Mycobacterium</em> were relatively abundant in bulk water and effluent, while <em>Hyphomicrobium, Gordonia,</em> and <em>Sphingobium</em> were significantly enriched in pipe-wall biofilms. With respect to the influences of pipe materials, PE system demonstrated superior performance in microbial regrowth control and water quality maintenance compared to DI, CI, and CS systems. The relative abundances of pathogens and disinfection-resistant bacteria in PE system were significantly lower, and corrosion-associated bacteria were markedly abundant in DI and CS systems. These results demonstrated lower potential microbial risks and higher practical advantages of PE pipe. Redundancy analysis and Mantel test revealed microbial communities correlated well with extracellular polymeric substances and reclaimed water characteristics (<em>p</em> &lt; 0.05). This study provided valuable insights into microbial risk control and pipe material selection for safer wastewater reclamation.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140116"},"PeriodicalIF":11.3,"publicationDate":"2025-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Long-term organic fertilization reduces cadmium bioavailability via enhanced binding to organic fractions and Fe-bearing minerals","authors":"Zhi-Lai Chi ,&nbsp;Qiang-Long Hu ,&nbsp;Lin Shi ,&nbsp;Fu-Sheng Sun ,&nbsp;Jun Wang ,&nbsp;Guang-Hui Yu","doi":"10.1016/j.jhazmat.2025.140102","DOIUrl":"10.1016/j.jhazmat.2025.140102","url":null,"abstract":"<div><div>Fertilizers provide essential plant nutrients but may introduce toxic cadmium (Cd), posing soil ecosystem risks. However, mechanisms governing Cd mobility and stabilization under different fertilization regimes remain unclear. In this study, soils from a 27-year field experiment were investigated under three treatments: inorganic fertilizer only (NPK), inorganic fertilizer with pig manure (NPKM), and no fertilizer (CK). Total and bioavailable Cd were quantified using chemical extraction and the diffusive gradients in thin films technique. Results indicated that NPKM increased total soil Cd 5-fold relative to NPK, but the proportion of bioavailable Cd (bioavailable Cd/total Cd) was 4-fold lower. Dissolved organic matter incubation coupled with Fourier transform infrared (FTIR) spectroscopy, two-dimensional correlation spectroscopy, and Fe <em>K</em>-edge X-ray absorption fine structure (Fe-XAFS) revealed that NPKM promoted the formation of active soil minerals, particularly reactive Fe-bearing minerals, and altered Cd-binding sequences in soil functional groups. In NPKM soils, wavelet analysis indicated atomic-scale Fe-Cd coordination (R = ∼1.8 Å, k = ∼12 Å⁻¹), suggesting that Fe–bearing minerals served as nucleation sites for Fe-Cd cluster formation. Synchrotron radiation-based FTIR spectroscopy (SR-FTIR) further demonstrated strong correlations (<em>p</em>＜0.0001, <em>r</em>^<em>2</em> = 0.34–0.85) between organic and inorganic functional groups, indicating that Fe–Cd clusters co-assembled with organic matter into stable organo-mineral complexes. These complexes effectively immobilized Cd, thereby reducing its mobility. This study established a novel multi-spectroscopy approach for elucidating Cd-binding mechanisms in soils, providing new insights into sustainable agriculture and soil remediation.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140102"},"PeriodicalIF":11.3,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Nicosulfuron-driven antibiotic resistance in corn silage: Effect and its mitigation by zinc oxide nanoparticles","authors":"Xia Zhang ,&nbsp;Bo Yang ,&nbsp;Huixian Zhang ,&nbsp;Xusheng Guo ,&nbsp;Yuanqing Zhang","doi":"10.1016/j.jhazmat.2025.140119","DOIUrl":"10.1016/j.jhazmat.2025.140119","url":null,"abstract":"<div><div>Antibiotic resistance genes (<strong>ARGs)</strong> present in animal feed represent a significant threat to human health via the food chain, and pesticide application in crop production may further accelerate the ARGs dissemination. Corn silage, a primary forage for herbivorous livestock, has been shown to harbor diverse ARGs; however, the impact of pesticide-induced stress and potential mitigation strategies on ARG proliferation remains poorly understood. This study investigated the mechanistic link between nicosulfuron exposure and ARG dynamics in corn silage, as well as the mitigating effects of zinc oxide nanoparticles (<strong>ZnO NPs</strong>) on ARG under nicosulfuron exposure using metagenomic sequencing and high-throughput quantitative PCR. Nicosulfuron exposure increased (<em>P</em> &lt; 0.05) ARG diversity and abundance, enriched (<em>P</em> &lt; 0.05) ARG-hosting genera such as <em>Pantoea</em>, <em>Escherichia</em>, and <em>Klebsiella</em>, and intensified (<em>P</em> &lt; 0.05) the correlation between ARGs and mobile genetic elements <strong>(MGEs)</strong>. Additionally, it disrupted microbial metabolic pathways and elevated (<em>P</em> &lt; 0.05) the ARG-associated risk index in corn silage. Conversely, ZnO NPs alleviated (<em>P</em> &lt; 0.05) these effects by reducing the abundance of key ARGs-<em>bacA</em>, <em>tetM</em>, and <em>ermB,</em> enhancing microbial diversity, promoting beneficial genera such as <em>Levilactobacillus</em> and <em>Companilactobacillus</em>, and decreasing the complexity of ARG-MGE-microbe co-occurrence networks in corn silage under nicosulfuron exposure. Structural equation modeling indicated that there was a significant association between bacterial community and ARGs proliferation, and it had the strongest explanatory power for the variation in ARGs abundance, followed by MGEs. These findings underscore the ecological risks associated with nicosulfuron and demonstrate that ZnO NPs have the potential to mitigate ARGs dissemination in pesticide-contaminated silage. However, this potential does not qualify ZnO NPs as an effective strategy, and their role in promoting safer forage production still requires further evaluation.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140119"},"PeriodicalIF":11.3,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Tracing source of microplastics contamination in CTC tea: Effect of processing stages and human health risk assessment","authors":"Riashree Mondal ,&nbsp;Dhruba Jyoti Sarkar ,&nbsp;Subarna Bhattacharyya ,&nbsp;Punarbasu Chaudhuri ,&nbsp;Basanta Kumar Das","doi":"10.1016/j.jhazmat.2025.140111","DOIUrl":"10.1016/j.jhazmat.2025.140111","url":null,"abstract":"<div><div>Globally, tea is a widely consumed beverage and is reported to be contaminated with microplastics (MPs), especially in tea bags. However, data is lacking in CTC (‘crush, tear, curl’) tea with a possible source appointment. Present study investigated abundance of MPs at different stages of CTC tea manufacturing process. MPs (10–82.4 μm) contamination was found highest at fermentation stage (1.1 particles g⁻¹) and lowest at drying stage (0.4 particles g⁻¹), with prevalence of polyethylene, polyacrylates, polyvinyl chloride, and nylon. Plucking, cutting &amp; rolling stages were associated with a higher abundance of fibrous and fragmented MPs. Further, tea processing equipment made of plastics, viz., withering trough, conveyor belt, fiber extractor machine, etc., contributes to MPs contamination in CTC tea. EDI_{<em>particles</em>} for CTC tea and brewed tea were 0.03–0.2 and 0.05–0.28 particles kg BW⁻¹ day⁻¹, respectively. Estimated average rate of MPs ingested (ARMI) was 6.19–73.9 μg person⁻¹ year⁻¹. Non-cancer (HQ) and cancer risk (ILCR) indices ranged from 1.53 × 10⁻⁸ to 5.44 × 10⁻⁵ and 1.45 × 10⁻⁹ to 2.59 × 10⁻⁷, respectively, which are within safety limits. The study generates baseline data for MPs contamination in processing stages of CTC tea and health risk associated with it.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140111"},"PeriodicalIF":11.3,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Integrated Enzymatic, Transcriptomic, and Metabolite Identification Insights into the Degradation of Diverse Endocrine-Disrupting Compounds by Pleurotus ostreatus GEMB-PO1","authors":"Yu Xun, Mingdong Zhu, Ling Feng, Nasi Zhang, Rui Zhuo","doi":"10.1016/j.jhazmat.2025.140104","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.140104","url":null,"abstract":"Endocrine-disrupting compounds (EDCs) represent a significant class of micropollutants that persist in environments and threaten ecological and human health. In this study, <em>Pleurotus ostreatus</em> GEMB-PO1 was investigated for its ability to degrade eight representative EDCs—bisphenol A (BPA), bisphenol F (BPF), tetrabromobisphenol A (TBBPA), butyl benzyl phthalate (BBP), di-n-butyl phthalate (DBP), di(2-ethylhexyl) phthalate (DEHP), 17β-estradiol (E2), and estrone (E1). Enzymatic activity assays and inhibitor experiments confirmed the synergistic roles of CYP450s and laccases in mediating intracellular and extracellular transformation processes. Transcriptomic analysis revealed that EDC exposure triggered the activation of a coordinated gene network involving CYP450s, laccases, NAD(P)H-dependent dehydrogenases, and secondary metabolite biosynthesis pathways, suggesting a fungal-wide metabolic reprogramming to cope with oxidative and xenobiotic stress. LC-MS identified compound-specific intermediate metabolites and enabled the reconstruction of stepwise degradation pathways. While distinct degradation pathways were observed among different compounds, most converged on oxidative transformations, accompanied by dealkylation or hydrolysis depending on molecular structure. To our knowledge, this is the first study to integrate enzymatic, transcriptomic, and metabolite-level evidence to systematically resolve the degradation mechanisms of structurally diverse EDCs by a single fungal strain. These findings expand the mechanistic understanding of fungal EDC degradation and highlight the bioremediation potential of <em>P. ostreatus</em> GEMB-PO1.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"88 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Metagenomic insights into the effects of ecological water replenishment on resistome and pathogens in urban wetland","authors":"Kaiming Hu, Zhe Wang, Qingyu Xu, Yingxue Chu, Yifan Qian, Xianwu Zhang, Wenbing Li, Yu Han, Binhao Wang, Hangjun Zhang","doi":"10.1016/j.jhazmat.2025.140117","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.140117","url":null,"abstract":"Urban wetland restoration increasingly relies on water replenishment, yet its impacts on resistome dissemination remain critically understudied. Here, we performed a comprehensive metagenomic survey of water and sediment from the Xixi National Wetland Park to investigate how water diversion from the surrounding Qiantang River affects the distribution and composition of antibiotic-resistant genes (ARGs), mobile genetic elements (MGEs), virulence factors (VFs), and pathogens. Among the detected ARGs, multidrug, macrolide-lincosamide-streptogramin, and bacitracin resistance genes were predominant. MGEs such as <em>tnpA</em>, <em>IS91</em>, and <em>istA</em>, and VFs involved in adherence and immune modulation were also abundant. Pathogens including <em>Fusobacterium varium</em> and <em>Leptospira noguchii</em> were frequently observed. RDA and MRM analysis revealed certain antibiotics emerged as influent factors of resistome composition. Notably, the vast majority of resistome types were shared between the wetland park and the external riverine environment, with a decline in resistome richness as distance from the water diversion source increased. This phenomenon indicates that river-to-wetland water diversion acts as a conduit, facilitating the broad dissemination of resistome components and pathogens into the wetland, while the wetland’s self-purification capacity also plays a role. Nevertheless, a small subset of ARGs and MGEs was significantly enriched within the wetland interior. Collectively, these results highlight the ecological risks of water replenishment in urban wetlands and underscores the need for mitigation strategies, such as source-water pretreatment and wetland sediment remediation.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"54 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145283284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Integration of PMF and explainable machine learning for source apportionment and ecological risk of microplastics in urban greenspaces","authors":"Jianhao Song ,&nbsp;Xingnian Ren ,&nbsp;Jinjiang Duan ,&nbsp;Kailei Li ,&nbsp;Xiangbin Gao ,&nbsp;Cheng Yang ,&nbsp;Yu Xiang ,&nbsp;Lei He ,&nbsp;Han Zhang ,&nbsp;Dongdong Gao ,&nbsp;Ruxin Yang ,&nbsp;Mengli Chen","doi":"10.1016/j.jhazmat.2025.140110","DOIUrl":"10.1016/j.jhazmat.2025.140110","url":null,"abstract":"<div><div>Microplastics (MPs) have emerged as a global environmental concern due to their widespread distribution and potential ecological risks. Urban greenspaces play a vital role in improving the quality of life for urban residents, and are threatened by MPs pollution. While previous studies on MPs have predominantly focused on agriculture soils, MPs pollution in urban greenspaces remains insufficiently explored. To address this gap, this study investigated the spatial distribution, source apportionment, and both current and future ecological risks of MPs pollution in urban greenspaces. The results showed that MPs abundance ranged from 141 to 1258 items/kg. Nearly half of MPs were predominantly fragments (54.3 %), and were smaller than 100 μm (49.2 %). The major types were polypropylene (32.6 %), polyethylene (27.9 %), and polyethylene terephthalate (12.0 %). Source apportionment indicated that MPs primarily originated from agriculture activities (29.6 %), mixed domestic-industrial emissions (24.1 %), and traffic-related sources (23.5 %). Although the current ecological risk of MPs to urban greenspaces was generally low, economic growth and transportation development are projected to drive future risk to reach moderate level by 2030. This study comprehensively identified the sources and ecological risks of MPs in urban greenspaces, providing valuable insights for developing targeted MPs pollution management strategies in urban systems.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140110"},"PeriodicalIF":11.3,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Vertical migration and transformation of metal(loid)s in surface layers of tailings ponds driven by induced biocrusts: Emphasizing arsenic and zinc dynamics","authors":"Yuchen Geng ,&nbsp;Jinglong Wang ,&nbsp;Panpan Zhou ,&nbsp;Bingjie Zhao ,&nbsp;Qinyi Chen ,&nbsp;Hongjie Qin ,&nbsp;Zhicong Wang ,&nbsp;Dunhai Li","doi":"10.1016/j.jhazmat.2025.140100","DOIUrl":"10.1016/j.jhazmat.2025.140100","url":null,"abstract":"<div><div>The formation of biological soil crusts (biocrusts) constitutes a pivotal initial phase in the natural rehabilitation of heavy metal(loid)-contaminated tailings ponds. Through integrating field studies and culture experiments, we investigated metal(loid) transformation and vertical redistribution dynamics during biocrust succession. Artificially induced biocrusts exhibit distinct developmental timelines: algal crusts established within 20 days, whereas moss crusts exhibited rapid expansion after 40 days. Biocrust development significantly enhanced upward metal(loid) migration, leading to differential enrichment patterns — arsenic (62 %) accumulation predominated in algal crusts, while zinc (25 %) peaked in moss crusts. Metal(loid)s were chelated in tightly bound extracellular polymeric substances (EPS), and the formation of biocrusts increased the residual fraction while reducing bioavailability. With development of algal crusts, As(V) and As(III) were reduced to elemental arsenic. Microbial community analyses revealed compositional shifts, with EPS-producing taxa and Fe/Mn oxide-precipitating microorganisms becoming increasingly abundant. Concurrent molecular analyses identified upregulation of key functional gene involved in arsenic redox transformation and zinc uptake, alongside variations in photosynthetic systems. These findings have provided novel insights into biocrust-mediated biogeochemical cycling in polluted environments.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"499 ","pages":"Article 140100"},"PeriodicalIF":11.3,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}