Journal of Hazardous Materials最新文献_第7页

Toxicity evaluation and prioritization of recycled plastic food contact materials using in silico tools

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137467

Rachelle D. Arcega, Pei-Shan Chih, Pei-Chun Hsu, Wei-Hsiang Chang, Rong-Jane Chen, Trias Mahmudiono, Ching-Chang Lee, Hsiu-Ling Chen

{"title":"Toxicity evaluation and prioritization of recycled plastic food contact materials using in silico tools","authors":"Rachelle D. Arcega, Pei-Shan Chih, Pei-Chun Hsu, Wei-Hsiang Chang, Rong-Jane Chen, Trias Mahmudiono, Ching-Chang Lee, Hsiu-Ling Chen","doi":"10.1016/j.jhazmat.2025.137467","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137467","url":null,"abstract":"This study assessed the toxicity of virgin and recycled plastic food contact materials (FCMs) at various recycling stages, migrated in four food simulants (water, 20% ethanol, 4% acetic acid, and n-heptane), using cytotoxicity and high-content screening (HCS) bioassays. Toxicity was correlated with migrating substances identified through chemical analyses, and samples were ranked by toxicity priority. Recycled polyethylene terephthalate (rPET) and 20% ethanol exhibited the highest reduction in cell viability, whereas virgin PET (vPET) showed even lower viability. Pellets did not trigger oxidative responses in HepaRG and HK-2 cells; however, bales and flakes affected their cell morphology and mitochondrial function. rPET-flake migration in 4% acetic acid was most toxic to HepaRG cells, while rPET-bale migration in 20% ethanol and rPP-flake migration in water were most toxic to HK-2 cells. Nonetheless, the negative effects on cell viability and HCS parameters were mostly mitigated at the final pellet stage. In HepaRG cells exposed to 4% acetic acid, antimony negatively correlated with cell viability and positively with cellular area, indicating its role in rPET-induced necrosis. ToxPi ranking identified vPET migration in n-heptane and water as top priorities given the nephrotoxic risks. This study emphasizes refining recycling methods and testing plastics to minimize FCM cytotoxicity.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"47 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076951","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}

引用次数: 0

Microplastics and the freshwater plankton: effects on grazing and mortality

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137497

Anita Galir, Dubravka Špoljarić Maronić, Filip Stević, Tanja Žuna Pfeiffer, Matea Dent, Tena Minarik

{"title":"Microplastics and the freshwater plankton: effects on grazing and mortality","authors":"Anita Galir, Dubravka Špoljarić Maronić, Filip Stević, Tanja Žuna Pfeiffer, Matea Dent, Tena Minarik","doi":"10.1016/j.jhazmat.2025.137497","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137497","url":null,"abstract":"When studying the effects of microplastics (MP) on zooplankton in freshwater environments, there is a knowledge gap at the community level, as most studies use monocultures under laboratory conditions with limited comparability to field studies. The aim of our study was to investigate the uptake of MP at environmentally relevant concentrations by a natural zooplankton community feeding on native phytoplankton. Rotifers and cladocerans comprised more than 96% of total zooplankton community, while nauplii and copepodites dominated the copepod community. To test the possible change in phytoplankton grazing and zooplankton mortality after MP exposure, zooplankton were exposed to three different polyethylene MP sizes: A (1-5 µm), B (27-32 µm), and C (45-53 µm) during 96 hours. Ingestion in group A was observed in 34% of rotifers, 20% of cladocerans and 67% of copepods. In group B, only cladocerans ingested MP, and to a much lower extent (2%), which could be due to the composition of the community. None of the zooplankton studied ingested MP particles in group C. The ingestion of MP decreased phytoplankton consumption, and phytoplankton abundance varied greatly between samples. The highest phytoplankton abundance was observed in the A samples with the highest proportion of ingested MP, indicating a significant reduction in grazing pressure that allowed phytoplankton to proliferate. This result, combined with the highest mortality of cladocerans in the A samples (12.7 ± 0.91%), indicates the negative impact of MP on the normal functioning of the freshwater plankton food web.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"22 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083645","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}

引用次数: 0

Driving forces of agricultural ammonia emissions in semi-arid areas of China: a spatial econometric approach

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137484

Yunrui Ai, Liyang Xue, Yong Li, Quanxi Xu, Xuan Dai, Yancong Wu, Ning Kang, Tingting Zhang, Jianfeng Gou, Yan Tao

{"title":"Driving forces of agricultural ammonia emissions in semi-arid areas of China: a spatial econometric approach","authors":"Yunrui Ai, Liyang Xue, Yong Li, Quanxi Xu, Xuan Dai, Yancong Wu, Ning Kang, Tingting Zhang, Jianfeng Gou, Yan Tao","doi":"10.1016/j.jhazmat.2025.137484","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137484","url":null,"abstract":"Ammonia emissions contribute to PM2.5 formation, posing significant threats to public health, including respiratory and cardiovascular diseases, and causing various ecological issues, such as soil and water acidification. This study investigates ammonia emissions in the semi-arid region of central Gansu Province, China, by establishing a county-level agricultural ammonia emission inventory for 2014–2020 using the emission factor method. A spatial econometric model, integrated with the STIRPAT (Stochastic Impacts by Regression on Population, Affluence, and Technology) model, is employed to identify key drivers of emissions. This approach is crucial because it accounts for the spatial dependencies of emissions across regions and incorporates socio-economic factors, providing a more comprehensive understanding of emission patterns. Results indicate that livestock and poultry farming (58.76%) and nitrogen fertilizer application (37.73%) are major contributors to ammonia emissions. Regional agricultural ammonia emissions are concentrated in the east, river basins, and parts of the southwest. The study also reveals positive spatial clustering and spillover effects of ammonia emissions. In the central region of Gansu Province, a 1% increase in per capita GDP, population, agricultural structure, and rural electricity consumption leads to changes in agricultural ammonia emissions of 0.059%, -1.181%, -0.109%, and 0.133%, respectively. Rural electricity consumption, population dynamics, and agricultural structure improvements influence not only locally but also across neighboring regions. The findings emphasize the need for targeted, collaborative regional strategies to mitigate emissions and underscore the importance of considering spatial interactions in emission reduction policies.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"44 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083646","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}

引用次数: 0

Formation of halonitromethanes, dichloroacetonitrile, and trichloromethane in the presence of E. coli and nitrophenols during UV/post-chlorination

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137499

Tao Wang, Qian Tang, Lin Deng, Chaoqun Tan, Yulin Fu, Jun Hu, Rajendra Prasad Singh

{"title":"Formation of halonitromethanes, dichloroacetonitrile, and trichloromethane in the presence of E. coli and nitrophenols during UV/post-chlorination","authors":"Tao Wang, Qian Tang, Lin Deng, Chaoqun Tan, Yulin Fu, Jun Hu, Rajendra Prasad Singh","doi":"10.1016/j.jhazmat.2025.137499","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137499","url":null,"abstract":"Nitrophenols and E. coli widely coexist in surface water and can form chlorinated disinfection byproducts (Cl-DBPs) in chlorine-based disinfection processes. However, the coexistence of nitrophenols and E. coli affecting Cl-DBPs formation has not been reported. Herein, the formation of chlorinated halonitromethanes (Cl-HNMs), dichloroacetonitrile (DCAN), and trichloromethane (TCM) in the simultaneous presence of nitrophenols and E. coli was investigated in the UV/post-chlorination process. Results indicated the coexistence of nitrophenols and E. coli ((1-2) × 105 CFU mL-1) enhanced Cl-DBPs formation, but excessive E. coli ((1-2) × 107 CFU mL-1) dramatically inhibited that. Moreover, appropriate UV fluences promoted Cl-DBPs formation, and increasing chlorine dose and nitrophenol concentration enhanced that. Besides, alkaline pH decreased Cl-HNMs and DCAN formation but facilitated TCM formation. Subsequently, the Cl-DBPs formation mechanisms and pathways were explored in the simultaneous presence of E. coli and nitrophenols. When nitrophenols and E. coli were present in real waters, more complicated formation phenomena of Cl-DBPs were observed compared to those in simulated waters (SWs). Finally, Cl-DBPs generated in real waters exhibited lower toxicities than those generated in SWs. This study provides new insights into Cl-DBPs formation in the presence of organic substances and bacteria, simultaneously contributing to a better UV/post-chlorination process application.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"122 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083644","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}

引用次数: 0

Polystyrene nanoplastics amplify the toxic effects of PFOA on the Chinese mitten crab (Eriocheir sinensis)

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137488

Peng Huang, Liping Cao, Jinliang Du, Yiqing Guo, Quanjie Li, Yi Sun, Haojun Zhu, Gangchun Xu, Jiancao Gao

{"title":"Polystyrene nanoplastics amplify the toxic effects of PFOA on the Chinese mitten crab (Eriocheir sinensis)","authors":"Peng Huang, Liping Cao, Jinliang Du, Yiqing Guo, Quanjie Li, Yi Sun, Haojun Zhu, Gangchun Xu, Jiancao Gao","doi":"10.1016/j.jhazmat.2025.137488","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137488","url":null,"abstract":"Nanoplastics (NPs), the final form of degraded microplastics in the environment, can adsorb PFOA (an emerging organic pollutant in recent years) in several ways. Current research on these has focused on bony fishes and mollusks, however, the combined toxicity of PFOA and NPs remains unknown in Eriocheir sinensis. Therefore, the effects of single or combined exposure to PFOA and NPs were investigated. The results showed that NPs aggravated PFOA exposure-induced oxidative stress, serum lipid disorders, immune responses, and morphological damage. DEGs altered by NPs-PFOA exposure were predominantly enriched in GO terms for cell lumen, and organelle structure, and KEGG terms for spliceosome and endocrine disorders-related diseases. Notably, the apoptotic pathway plays a central role enriched under different exposure modes. PFOA or NPs-PFOA exposure disrupted the levels of lipids molecules-related metabolites by mediating the glycerophospholipid pathway, and the NPs mediated the ferroptosis pathway to exacerbate PFOA-induced metabolic toxicity. In addition, NPs exacerbated the inflammatory response and metabolic imbalance by mediating Fusobacterium ulcerans in the intestinal. In conclusion, this study provides a valuable reference for the characterization of NPs-PFOA combined pollution and a scientific basis for the development of environmental protection policies and pollution management strategies.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"29 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083642","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}

引用次数: 0

Impacts of Changes in PM2.5 Concentrations and Their Major Components on Blood Pressure during Pregnancy

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137477

Peiyao Chen, Wenjie He, Yan Jin, Xueting Liu, Qiannan Wei, Jianling Shen, Qingqing Wang, Li Wen, Lijie Wang, Qing Wei, Qiansheng Hu, Weiwei Lin

{"title":"Impacts of Changes in PM2.5 Concentrations and Their Major Components on Blood Pressure during Pregnancy","authors":"Peiyao Chen, Wenjie He, Yan Jin, Xueting Liu, Qiannan Wei, Jianling Shen, Qingqing Wang, Li Wen, Lijie Wang, Qing Wei, Qiansheng Hu, Weiwei Lin","doi":"10.1016/j.jhazmat.2025.137477","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137477","url":null,"abstract":"Sulfate, nitrate, ammonium, organic matter, and black carbon account for more than two-thirds of the total mass of PM2.5 and have stronger cardiovascular toxicity than other components. However, evidence regarding the gestational cardiovascular toxicity of these PM2.5 components is lacking. A prospective cohort study was conducted among 1913 pregnant women in Guangzhou, Pearl River Delta, China, from 2017 to 2020. Each participant underwent two office blood pressure (BP) measurements: baseline BP was assessed during the first and second trimesters (mean gestational age: 13.77 ± 2.76 weeks) and follow-up BP was measured during the third trimester (mean gestational age: 39.00 ± 1.46 weeks.) The level of the five main PM2.5 components were estimated using a tracking air pollution dataset. Changes in PM2.5 component concentrations and BP levels were determined by calculating the differences between follow-up and baseline values. We found that changes in PM2.5 mass and components significantly affected gestational BP variations (β = 1.88-3.42, P < 0.001). Most associations exhibited an inverted U-shaped non-linear relationship, initially increasing steeply before leveling off, without a clear threshold. Systolic blood pressure (SBP) was more sensitive to concentration changes in PM2.5 components, with nitrate showing a particularly pronounced effect. Our findings suggest that changes in PM2.5 mass and its specific components levels were associated with maternal BP, especially increased SBP, with nitrate being the major contributor. Stricter emission reduction measures are needed to mitigate urban pollution sources associated with particulate nitrate.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"22 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076891","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}

引用次数: 0

Development of a highly sensitive PbrR-based biosensor via directed evolution and its application for lead detection

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137489

Liang Shen, Yiwen Chen, Jiajie Pan, Xin Yu, Yubo Zhang, Bingxin Guo, Jiaqi Wang, Ying Liu, Xiang Xiao, Shaopeng Chen, Lingzhi Bao

{"title":"Development of a highly sensitive PbrR-based biosensor via directed evolution and its application for lead detection","authors":"Liang Shen, Yiwen Chen, Jiajie Pan, Xin Yu, Yubo Zhang, Bingxin Guo, Jiaqi Wang, Ying Liu, Xiang Xiao, Shaopeng Chen, Lingzhi Bao","doi":"10.1016/j.jhazmat.2025.137489","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137489","url":null,"abstract":"The Whole-cell biosensor (WCB) is a convenient and practical assay that can monitor bioavailable lead (Pb) contamination. However, existing Pb-responsive WCB struggle to meet practical detection needs due to the lack of sensitivity, specificity, and stability. In this study, we developed a Pb WCB using the Pb resistance transcriptional regulatory factor (PbrR) and green fluorescent protein (GFP), and improved its performance by directed evolution in conjunction with fluorescence-activated cell sorting (FACS). After 3 rounds of screening, we acquired a biosensor mutant (PbrR-E3). The evolved biosensor exhibited an approximately 11-fold increase in maximum fluorescence output signal compared to the non-evolved biosensor, resulting in an improvement of its sensitivity and specificity. This biosensor demonstrated a limit of detection (LOD) of 0.045 μg/L. Furthermore, the evolved biosensor showcased outstanding performance in the detection of Pb(II) in tea infusion and also demonstrated good stability in tests with spiked real water samples. These results highlight the potential of the evolved WCB as a viable approach for monitoring Pb.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"36 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076893","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}

引用次数: 0

Efficient Control of Molds Contamination through Gene Cluster Regulation and Enzyme Rational Design of Iturin A

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137472

Daiyuan Zhang, Dian Zou, Xianglan Wu, Kuo Huang, Changwen Ye, Xuetuan Wei

{"title":"Efficient Control of Molds Contamination through Gene Cluster Regulation and Enzyme Rational Design of Iturin A","authors":"Daiyuan Zhang, Dian Zou, Xianglan Wu, Kuo Huang, Changwen Ye, Xuetuan Wei","doi":"10.1016/j.jhazmat.2025.137472","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137472","url":null,"abstract":"Molds are prevalent environmental contaminants, posing significant risks to both human and animal health. Iturin A, known for its potent antifungal activity, offers a potential solution for control of molds contamination. In this study, a novel strain Bacillus velezensis ZD122 was successfully screened for iturin A production and mold control, and the gene cluster ituDABC was identified to be responsible for iturin A synthesis by genomic analysis. Through inserting the promoter in front of ituA and ituD simultaneously, the production of iturin A of ZD-P5 were increased by 2.08-fold compared with the wild strain ZD122. Meanwhile, the malonyl-CoA transacylase ItuD was modified by rational design to obtain the beneficial mutant ItuDR117A/C161A, resulting in a 74% increase in iturin A yield compared to the control strain. Molecular dynamics simulations further elucidate the potential mechanisms underlying the enhancement of enzyme activity. Through combinatorial expression, the iturin A production of the optimized recombinant strain ZD-P5/pHY-ituDR117A/C161A reached 1.32 g/L. The increased iturin A production significantly enhanced antifungal efficacy against various molds. In summary, this study provides a valuable microbial resource for the production of iturin A, offering efficient strategies for control of the mold contamination.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"77 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076952","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}

引用次数: 0

One-step high-efficiency recovery of high-purity MoO3 from spent hydrodesulfurization catalyst by water-vapor enhanced sublimation process

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137462

Shuo Liu, Haoran Yu, Ali Yaras, Linchao Hu, Wenyi Zhang, Mingguo Peng, Battsengel Enkhchimeg, Linqiang Mao

{"title":"One-step high-efficiency recovery of high-purity MoO3 from spent hydrodesulfurization catalyst by water-vapor enhanced sublimation process","authors":"Shuo Liu, Haoran Yu, Ali Yaras, Linchao Hu, Wenyi Zhang, Mingguo Peng, Battsengel Enkhchimeg, Linqiang Mao","doi":"10.1016/j.jhazmat.2025.137462","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137462","url":null,"abstract":"Spent hydrodesulfurization (HDS) catalysts were considered as a vital secondary resource for precious metals like Mo. The current pyrometallurgy and hydrometallurgy usually exhibits the characteristic of remarkable high energy consumption and high secondary pollutions. This study proposes an innovative technique to recycling MoO3 from spent HDS catalyst by sublimation process at high temperature, which has notable advantages of zero wastewater-generation and zero chemical reagent consumption. Notably, MoO3 recovery efficiency was improved remarkably with the introduction of water-vapor. About 99.33% of MoO3 was recovered by heating spent HDS catalyst at 1100℃ for 2.5 h in water-vapor atmosphere with partial pressure of 101.33 kPa. The yielded MoO3 was tested with the purity of 99.94% and exhibited the appearance of thin strips. Furthermore, the sublimation kinetic of MoO3 in air was adhered to a desorption model, while agreed with a non-desorption model in water-vapor atmosphere. Density Functional Theory (DFT) calculations revealed that -OH obtained by the dissociation of H2O molecules preferably combined with MoO3 and formed the volatile MoO3-OH, which was responsible for enhancing MoO3 sublimation efficiency significantly in water-vapor atmosphere. Economic analysis suggested that the direct cost of this method was 345 $/t, accounting for around 50% compared to current roasting-leaching-purification methods. Overall, MoO3 sublimation enhanced by water-vapor atmosphere can be considered as a high-efficient and environmental-friendly approach for Mo recovery from spent catalysts.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"11 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143076953","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}

引用次数: 0

Co-occurrence of microplastics and heavy metals to urban river sediments: the vertical distribution characterization and comprehensive ecological risk assessment

IF 13.6 1区环境科学与生态学

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI: 10.1016/j.jhazmat.2025.137500

Wenjuan He, Jinhui Huang, Si Liu, Lixiu Shi, Enjie Li, Jinying Hu, Wei Zhang, Chenyu Zhang, Haoliang Pang, Zhexi Liu

{"title":"Co-occurrence of microplastics and heavy metals to urban river sediments: the vertical distribution characterization and comprehensive ecological risk assessment","authors":"Wenjuan He, Jinhui Huang, Si Liu, Lixiu Shi, Enjie Li, Jinying Hu, Wei Zhang, Chenyu Zhang, Haoliang Pang, Zhexi Liu","doi":"10.1016/j.jhazmat.2025.137500","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137500","url":null,"abstract":"Microplastics (MPs) and heavy metals (HMs) are deemed to pose ecological risks in river ecosystems. The vertical distribution of these pollutants is more conducive to reflecting pollution status and monitoring trends in the sediment. This work analyzed the horizontal and vertical distribution, carried out a risk assessment of HMs and MPs in urban river sediment, and further optimized the two-dimensional comprehensive index (TPI) model for MPs-HMs combined pollution. The highest rates of contamination were for Zn, As, and Cd, and MP abundance in sediment ranged from 20.00 ± 8.82 to 1933.33±141.42 items·kg−1, mainly characterized by PE and fragments. Moreover, the mean potential ecological risk index for MPs (PRI) at different depths of sediment were 197.21±247.14, 176.79±293.86, and 246.98±538.38, respectively, indicating a moderate risk and the highest PRI value is at the bottom. The TPI exhibited that the average TPI at different depths is 324.10±138.63, 368.30±157.13, and 481.88±296.05, indicating that the comprehensive pollution risk level belongs to considerable, the TPI increases with the depth of the sediment. The results further improved the objectivity and accuracy of the research on the ecotoxicity of compositive pollutants and provided an in-depth understanding of MPs and HMs in urban freshwater basins from a vertical perspective.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"3 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083647","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}

引用次数: 0