Journal of Hazardous Materials最新文献

{"title":"Dual regulation of As release and soil environment by Fe(Ⅱ) assisted steel slag and coal fly ash: Effects and potential mechanisms","authors":"Yuliang Zhang, Pingfeng Fu, Sheng Li, Wei Deng, Shan Li, Wen Ni, Siqi Zhang","doi":"10.1016/j.jhazmat.2024.136599","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136599","url":null,"abstract":"Multiple solid waste-based amendments are used for arsenic (As)-contaminated soil remediation, but their mechanisms in inhibiting As release and the effects on soil health in real sites remain poorly understood. Here, an amendment consisting of steel slag (SS), coal fly ash (CFA) and Fe(Ⅱ), namely, Fe(Ⅱ) assisted SS and CFA, was applied to an As-contaminated mining soil. 120 days field experimental results revealed that amendment addition in low-As soil (LA soil) and high-As soil (HA soil) significantly increased amorphous Fe(Ⅲ) (hydro)oxides content and decreased dissolved organic carbon (DOC), and thus inhibited As mobilization. More importantly, the soil microbial community activity was improved in HA soil, while it significantly decreased in LA soil. Correlation analyses demonstrated that the activation of fungal and bacterial communities was directly correlated with soil pH, amorphous Fe(Ⅲ) (hydro)oxides, soil organic matter (SOM), and DOC. The C-containing functional groups, newly generated Fe(Ⅲ) (hydro)oxides and Fe-As-SOM complexes inhibit As release, while the Fe(Ⅲ) reduction drove the As release. This work highlighted the importance of Fe(Ⅱ) assisted SS and CFA in inhibiting As release and regulating soil microbial communities, providing a new strategy for the remediation of heavy metals contaminated mining soil using solid waste-based amendment.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"38 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678649","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":"Species-specific Accumulation of Microplastics in Different Bird Species from South China: A Comprehensive Analysis","authors":"Ying Zeng, Junjie Cai, Yujing Zhu, Jichao Wang, Rui Guo, Li Jian, Xiaobo Zheng, Bi-Xian Mai","doi":"10.1016/j.jhazmat.2024.136607","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136607","url":null,"abstract":"Microplastics are widespread in many bird species, but the inter-specific variations of microplastic contamination are still unclear. The present study measured microplastics in 24 bird species from South China and investigated the impacts of bird physiological and ecological traits on microplastic contamination. The median abundances of microplastics ranged between 5-167.2 particles per individual or 0.023-3.58 particles per g body weight. Approximately 60% of microplastics were within the size range 20-50 μm, with the primary polymer types of polypropylene (PP) and polyethylene terephthalate (PET). There was no significant correlation between microplastic abundances and bird body weights and trophic levels (δ¹⁵N) in different bird species. Insectivorous birds had significantly higher abundances of microplastics smaller than 0.1<!-- --> <!-- -->mm than granivorous, piscivorous, and carnivorous birds (<em>p</em> &lt; 0.01), which was further supported by the meta-analysis of microplastic contamination in birds. On contrary, meta-analysis results indicate that piscivorous birds tend to accumulate larger microplastics (&gt; 1<!-- --> <!-- -->mm) than other bird species. Microplastic contamination in different bird species was more influenced by diet source rather than trophic level and body weight. Potential ecotoxicological risks were observed for most insectivorous species in the preliminary risk assessment. Particular concern should be paid on insectivorous birds, which have been scarcely studied for microplastics but were at high exposure risks of microplastics among bird species.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"41 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673599","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":"Atomic H⁎-mediated electrochemical reduction of bromate by a facile Ti/Pd@MXene filter electrode","authors":"Xu Yin, Jiatian Yu, Zhifeng Gao, Wei Li, Kajia Wei, Yun Jiang, Yonghao Zhang, Haoming Chen, Weiqing Han","doi":"10.1016/j.jhazmat.2024.136598","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136598","url":null,"abstract":"Bromate (BrO₃^–) is a common by-product of advanced oxidation water treatment processes. In this study, a catalyst combining MXene and Pd was synthesized to eliminate BrO₃^– by electrochemical reduction in flow-through mode. The fabricated Ti/Pd@MXene filter showed superior activity for BrO₃^– reduction compared with Ti/MXene filter. A satisfactory BrO₃⁻ removal performance by Ti/Pd@MXene filter was obtained at pH values of 5~7 with a current density of 1.0~2.5<!-- --> <!-- -->mA·cm^–2. The mechanism explored by quenching experiments and EPR analysis demonstrated that atomic hydrogen (H⁎)-mediated reduction was dominant in the Ti/Pd@MXene filter system and contributed to 84.2% of the BrO₃⁻ removal, which was greater than that of Ti (7.1%) and Ti/MXene (43.9%). DFT calculations revealed the introduction of Pd nanoparticles on MXene lowered the energy barrier for generating H⁎ from OH⁎-H⁎, thus boosting H⁎ formation. Furthermore, the Ti/Pd@MXene filter had favorable stability and applicability, and nearly 90% of BrO₃⁻ could be eliminated in different water matrices. Moreover, energy consumption of the Ti/Pd@MXene filter was more competitive than that previously reported (0.348 kWh·mmol⁻¹), especially for high BrO₃⁻ removal (≥75%). This work highlighted an effective flow-through electrocatalytic filter to induce H⁎-mediated electrochemical reduction of BrO₃⁻.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"14 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678203","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":"Enhancing indoor air quality and cardiopulmonary health in patients with asthma by photocatalytic oxidation and filters air cleaner","authors":"Jia Lin Zhang, Guan-Yu Liao, Hong-Yi Lin, Jie-An Xie, Wan-Chen Li, Huang-Chi Chen, Da Wei Wu, Huai-Lei Juan, Jia-Yu Kuo, Pei-Shih Chen","doi":"10.1016/j.jhazmat.2024.136573","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136573","url":null,"abstract":"<h3>Background</h3>Air purifiers can enhance indoor air quality and health outcomes, and studies have primarily focused on filters and particulate matter (PM) in households. Photocatalytic oxidation (PCO) is a promising technique for eliminating gaseous pollutants and bioaerosols. However, no field study was conducted in household. Therefore, this study evaluated the effects of the PCO and PCO + filters intervention on indoor air pollutants and cardiopulmonary endpoints in households.<h3>Methods</h3>A randomized, double-blind crossover clinical trial was conducted. Indoor air pollutants, including PM, bioaerosols, and gaseous pollutants and cardiopulmonary endpoints including lung function, fractional exhaled nitric oxide (FeNO), respiratory symptoms, and blood pressure were assessed before and after intervention.<h3>Findings</h3>This was the first study to evaluate the effects of PCO and PCO + filters interventions on indoor air pollutants and cardiopulmonary health in households. Indoor total volatile organic compounds (TVOC) and sulfur dioxides (SO₂) significantly reduced after PCO intervention, however, we also observed the significant reduction in percentage of predicted values of forced vital capacity (FVC%) and forced expiratory volume in 3<!-- --> <!-- -->s (FEV₃%) and increased in FeNO after 13 days of PCO intervention. The PCO + filters intervention significantly reduced the levels of indoor PM₁, PM_2.5, PM₄, PM₁₀, total suspended particulate matter, ultrafine particles, airborne bacteria, fungi, endotoxin, mites, TVOC, nitrogen dioxide, and SO₂, and marginal reduction in carbon monoxide. However, indoor carbon dioxide significantly increased after PCO/PCO + filters intervention. As for cardiopulmonary health, FVC%, and FEV1% marginally increased 7 days after the PCO + filters intervention.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"13 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673558","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":"Construction of Interpretable Ensemble Learning Models for Predicting Bioaccumulation Parameters of Organic Chemicals in Fish","authors":"Minghua Zhu, Zijun Xiao, Tao Zhang, Guanghua Lu","doi":"10.1016/j.jhazmat.2024.136606","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136606","url":null,"abstract":"Accurate prediction of bioaccumulation parameters is essential for assessing exposure, hazards, and risks of chemicals. However, the majority of prediction models on bioaccumulation parameters are individual models based on a single algorithm and lack model interpretation, resulting in unsatisfactory prediction accuracy due to inherent constraints of the algorithm and weak interpretability. Ensemble learning (EL) that combine multiple algorithms, coupled with SHapley Additive exPlanation (SHAP) method, may overcome the limitations. Herein, EL models were constructed for three bioaccumulation parameters using datasets covering 2496 chemicals. The EL models demonstrated superior prediction accuracy compared to both individual models developed in this study and those from previous research, achieving a coefficient of determination of up to 0.861 on the validation sets. Applicability domains were characterized using a structure-activity landscape-based (abbreviated as AD_SAL) methodology. The optimal EL models, together with the AD_SAL, were successfully used to predict bioaccumulation parameters for 4,374 chemicals included in the Inventory of Existing Chemical Substances of China. Model interpretation using the SHAP method offered insight into key features influencing bioaccumulation potential, including hydrophobicity, water solubility, polarizability, ionization potential, weight, and volume of molecules. Overall, the study provides data and models to support the sound management and risk assessment of chemicals.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"24 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673600","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":"Selected Emerging Contaminants in Water: Global Occurrence, Existing Treatment Technologies, Regulations and Associated Risk","authors":"Vinay Meena, Deepak Swami, Aman Chandel, Nitin Joshi, Shiv O. Prasher","doi":"10.1016/j.jhazmat.2024.136541","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136541","url":null,"abstract":"Emerging contaminants (ECs) in aquatic environments have recently attracted the attention of researchers due to their ubiquitous occurrence and the potential risk they may pose to life. While advance analytical methods have improved global reporting in water matrices, additional information is needed to compile data on their occurrence, existing legislation, treatment technologies and associated human health risks. Therefore, the present study provides an overview of the occurrence of selected ECs, including personal care product, antibiotics, NSAIDs, EDCs and psychiatric drugs, the existing regulatory framework and their toxicological effects on human health. The water matrices under review are the treated wastewater, surface water, groundwater and, in a few cases, drinking water. The study also highlights different treatment technologies available, and evaluates their performance based on the removal efficiency for different classes of ECs. For removal of almost all ECs considered, ozonation integrated with gamma radiation was reported highly efficient. Risk analysis was also performed for selected ECs including diclofenac, ibuprofen, naproxen, carbamazepine, estrone, 17 β-estradiol, bisphenol A, sulfamethoxazole, erythromycin and triclosan. The human health risk analysis indicated the highest number of locations with potential risk due to the EDCs, with South America, Europe and Asia having multiple risks due to estrone and Bisphenol A. The results of this study will give a better insight into the current situation of ECs in the global water matrices, the performance assessment of treatment technologies and the risk analysis will describe the need for more robust regulatory structures around the world to prevent the occurrence of such contaminants in the aquatic environment.<h3>Environmental Implications</h3>The research underscores the pressing environmental implications of emerging contaminants (ECs) in aquatic systems. The compilation of global data on the occurrence of ECs provides insight into their extensive presence and facilitates the identification of regions and water matrices most affected. This information can inform targeted monitoring and management strategies in areas with raised contamination levels. The study also emphasises need for more generalised and robust regulatory framework to mitigate the presence of emerging contaminants in environmental water. Moreover, with the risk assessment the study also supports the development of targeted risk management strategies.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"99 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673622","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":"Deposition behavior of PbTe doped LBE aerosol and Te valence prediction: platform test and first-principles calculation","authors":"Yuqing Wang, Hui Du, Yi Tan, Yan Chen, Futing Jing, Jiewei Wu, Yingwu Jiang, Hanyu Wu, Fuhao Ji, Muyi Ni, Man Jiang","doi":"10.1016/j.jhazmat.2024.136524","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136524","url":null,"abstract":"In fast reactor investigation with lead-bismuth eutectic(LBE) coolant, understanding the source term within the reactor and its environmental migration is crucial for managing radiation hazards from ²¹⁰Po aerosols. The numerical simulations using empirical parameters have proffered insights into the theoretical migration and settling rates of ²¹⁰Po aerosols. However, the scarcity of platform tests has impeded the acquisition of particle size distributions and settling velocity, thus weakening the mutual confirmation between experimental and theoretical validation. In this study, an LBE aerosol testing platform (LATP) was designed and established to obtain the particle concentration data to predict ²¹⁰Po migration, where Te was employed as an experimental surrogate. The particle concentration and size distribution function of PbTe-doped LBE aerosol were measured by an aerosol spectrometer and a universal scanning mobility particle sizer, revealing the particle size distribution spanning from 0 to 800<!-- --> <!-- -->nm. Under normal operating conditions (873<!-- --> <!-- -->K), the pinnacle particle size of the aerosol concentration is 47<!-- --> <!-- -->nm, which shifted to 41<!-- --> <!-- -->nm under accident conditions (1223<!-- --> <!-- -->K). Notably, the highest mass concentration of particles under both circumstances falls within the 200-300<!-- --> <!-- -->nm range. The settling velocity of PbTe-doped LBE aerosol increase with the particle size, and ranging from 5.0×10^-7 to 7.1×10^-5m/s. First-principles calculations and X-ray photoelectron spectroscopy results indicate that PbTe-doped LBE aerosols should preferentially generate TeO₂ during the interaction with oxygen. This work provide a reasonable prediction method for the migration characteristics of polonium under severe accident.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"15 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673562","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":"Modulating Fe sites by La in porous MnFe2O4 for enhanced removal of ROX: Synergy of efficient adsorption and PMS activation","authors":"Yukun Si, Dandan Wang, Yuying Han, Congting Sun, Lanlan Xu, Mengfan Chen","doi":"10.1016/j.jhazmat.2024.136600","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136600","url":null,"abstract":"Catalytic-adsorption method is a promising strategy for degrading organoarsenic compounds and removing secondary inorganic arsenic. The method relies significantly on heterogeneous catalysts with selectively adsorption and enhanced peroxymonosulfate (PMS) activation capacity. In this study, active sites for selective adsorption and PMS activations were developed by modulating the Fe-sites in porous MnFe₂O₄ through La-doping. Synchrotron radiation, EPR, and XPS characterizations confirmed the presence of oxygen vacancies, metal hydroxyl groups <img alt=\"triple bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/tbnd.gif\" style=\"vertical-align:middle\"/>M(Fe/Mn/La)-(OH) and the active Fe(II)/Mn(II,III), as well as the fine structure of La occupied sites. Theoretical calculations indicate that the generation of Vo would increase the local electron cloud density of La dopants, leading to the transfer of local electrons into the bulk phase. The electron transfer characteristics result in the raising the d-band center of MnFe₂O₄ and lowering the Gibbs free energy of the intermediate state, thus promoting ¹O₂ generation. In 3% La-MnFe₂O₄/PMS system, 96% ROX (10<!-- --> <!-- -->mg/L) were removed within 35<!-- --> <!-- -->min with the secondary inorganic arsenic levels below 10 μg/L. The rate coefficients <em>k</em> for ROX removal in porous 3%La-MnFe₂O₄/PMS is 4.05 times higher than that in MnFe₂O₄/PMS. ROX was effectively removed in different water matrices (Liao River, Hun River, and groundwater), demonstrating the practical application potential of 3% La-MnFe₂O₄/PMS system. Under continuous flow conditions, an average of 97.9% and 87.3% of ROX were removed from ultrapure water and groundwater, respectively, over a 10-hour continuous run. This study highlights the high-performance spinel La-MnFe₂O₄ for the synergistic enhancement of PMS activation, secondary arsenic adsorption, and improved mass transfer, contributing to green and safe water treatment strategies.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"231 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678650","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":"Association of maternal pyrethroid pesticides exposure during the whole pregnancy with neonate lipid metabolism: A Prospective Birth Cohort Study, Yunnan, China","authors":"Shuqi Chen, Xia Xiao, Xiaoxiao Song, Tong Luo, Jirong Li, Tengwei Gui, Yan Li","doi":"10.1016/j.jhazmat.2024.136603","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136603","url":null,"abstract":"Dyslipidemias may emerge during the fetal period. However, the association between prenatal pyrethroid pesticides (PYRs) exposure and neonatal lipid metabolism remains uncertain. To explore the association of prenatal PYRs exposure and neonates’ lipid metabolism, pregnant women were recruited in rural Yunnan, China, and their urine samples in the first, second, and third trimester and their neonates’ cord blood samples were collected to obtain urinary PYRs metabolites (3PBA, 4F3PBA, and DBCA), cord blood TC, TG, HDL-C, LDL-C, and Non-HDL-C, AIP, CRI-I, CRI-II, AC, and LCI. We found the total PYRs detection during pregnancy was 99.6%. High-level DBCA in the first and third trimester and high-level 3PBA in the second trimester increased risks of high AIP. High-level ∑PYRs in the third trimester enhanced risks of high levels of TG, LDL-C, Non-HDL-C, AIP, and LCI. Repeated high-level 3PBA in two trimesters and above elevated risks of high levels of TG, LDL-C, CRI-I, AIP, AC, and LCI. Repeated high-level DBCA group in two trimesters and above increased the risk of high AIP. Repeated high ∑PYRs in three trimesters intensified risks of high levels of TC, LDL-C, Non-HDL-C, and AIP. Thus, our study suggests high PYRs exposure during the whole pregnancy may increase the risk of neonate abnormal lipid metabolism. The third trimester is the most sensitive window of high prenatal PYRs exposure. The adverse effects on neonate lipid metabolism increased as the increasing of trimesters repeated high-level PYRs exposure during pregnancy. Different kinds of PYRs exposure may induce different cord blood abnormal lipids.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"165 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673560","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":"Arsenic distribution and speciation in deposited coal mine dust","authors":"Yunfei Shangguan, Baoqing Li, Xinguo Zhuang, Xavier Querol, Natalia Moreno, Pengcheng Huang, Yajie Guo, Yutao Shi, Tianchi Wu, Patricia Córdoba Sola","doi":"10.1016/j.jhazmat.2024.136537","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2024.136537","url":null,"abstract":"This study investigates arsenic (As) species, sources, and transformation patterns in deposited coal mine dust (DCMD) from three coal mines—QSY, MHJ, and SCC—in the Ningdong Coalfield, China. While the parent coals have low As levels, the DCMD shows significant enrichment, with concentrations 137 to 345 times higher. The mineral composition of the DCMD reflects that of the parent coals but includes secondary minerals such as gypsum and various trace elements, including As. This enrichment results from multiple factors: polluted waters used for dust control in the working front (WF), gangue dust introduced during mining operations, wear from mining machinery affecting Fe levels, and precipitation of As-salts from alkaline mine drainage. In the parent coals, As(V) comprises 60-65% of the As, while As(III) accounts for 14-35%. In contrast, the DCMD samples reveal As(V) as the dominant species (22-58%), with As(III) making up 18-44%. Arsenic leachability is influenced by Fe content, enhancing As adsorption and limiting mobility in QSY mine, while mixed As complexes in MHJ and SCC under alkaline conditions affect As mobility. The presence of more toxic As(III) in DCMD highlights environmental and health risks, emphasizing the need to avoid high-As polluted waters for dust control.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"57 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678198","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}