Journal of Hazardous Materials最新文献

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Management Strategies to Reduce Microbial Mercury Methylation in Constructed Wetlands: Potential Routes and Future Challenges
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-21 DOI: 10.1016/j.jhazmat.2025.138009
Zhike Li, Yindong Tong, Zhengyu Wu, Bing Liao, Guo Liu, Lei Xia, Chang Liu, Li Zhao
{"title":"Management Strategies to Reduce Microbial Mercury Methylation in Constructed Wetlands: Potential Routes and Future Challenges","authors":"Zhike Li, Yindong Tong, Zhengyu Wu, Bing Liao, Guo Liu, Lei Xia, Chang Liu, Li Zhao","doi":"10.1016/j.jhazmat.2025.138009","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138009","url":null,"abstract":"Constructed wetlands (CWs) are widely recognized as the potential hotspots for producing highly toxic methylmercury (MeHg). This presents an obstacle to the widespread application of CWs. A comprehensive discussion on strategies to control mercury methylation in CWs is currently lacking. This review highlighted the potential impacts of differences in oxygen supply and consumption in various CWs, the characteristics of influent quality, the interactions between different substrates and mercury (including mercury adsorption, reduction), and plants on microbial mercury methylation in CWs. We also proposed the potential strategies for human intervention in regulating or controlling microbial mercury methylation in CWs, including oxygenation, nitrate inhibition, selection of substrates with high adsorption capacity, weak reducibility and low organic matter release, and plant management. Knowledge summarized in this review would help achieve a comprehensive understanding of various research gaps in previous studies and point out future research directions by focusing on CWs types, influent quality, substrates selection and plants management, to reduce the mercury methylation in CWs.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"56 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672792","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
Embryonic exposure to prednisone induces bone developmental toxicity in zebrafish: characteristics and molecular mechanisms
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-20 DOI: 10.1016/j.jhazmat.2025.137996
Jiaqi Wang, Yangfan Shangguan, Fei Long, Yu Guo, Hui Wang, Liaobin Chen
{"title":"Embryonic exposure to prednisone induces bone developmental toxicity in zebrafish: characteristics and molecular mechanisms","authors":"Jiaqi Wang, Yangfan Shangguan, Fei Long, Yu Guo, Hui Wang, Liaobin Chen","doi":"10.1016/j.jhazmat.2025.137996","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137996","url":null,"abstract":"As a synthetic glucocorticoid, prednisone has been widely used in autoimmune diseases, recurrent abortion and asthma during pregnancy. Although studies suggested that glucocorticoid exposure during pregnancy have developmental toxicity, systematic research on the characteristics of the developmental toxicity of prednisone is lacking. This study intends to construct embryonic prednisone exposure (EPE) model to observe its bone developmental toxicity characteristics of prednisone and explore the mechanism. The results showed that EPE can shortened body and head length, reduced eye and head area, decreased operculum mineralization area, reduced mineralized vertebrae number, shortened ceratohyal and palatoquadrate cartilage length, and decreased expression of key osteogenic differentiation and cartilage development genes. The toxicity to osteogenesis is more severe than chondrogenesis. The toxicity caused by exposure in the middle and terminal stages of embryogenesis is more serious and shows a concentration-effect relationship. We confirmed that Gr/Hdac6 signaling activation mediates prednisone-induced inhibition of osteoblast differentiation by epigenetically regulating the Postnb/Wnt/β-catenin signaling pathway. The results of this study systematically demonstrate the characteristics of prednisone-induced systemic, bone, and cartilage developmental toxicity, and clarify the epigenetic mechanism of its osteogenic developmental toxicity. This provides theoretical and experimental evidence for the safe use of prednisone during pregnancy and the determination of early monitoring targets for bone developmental toxicity.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"56 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665966","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
Unveiling the reaction pathways in the degradation mechanism of enrofloxacin by hydroxyl radicals: A DFT and experiment study
IF 12.2 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-20 DOI: 10.1016/j.jhazmat.2025.137950
Wenjing Liu, Aofan Wang, Xinruo Wang, Zhonghua Shen, Jishi Wang, Jie Ma, Yujie Zhao, Zeying He
{"title":"Unveiling the reaction pathways in the degradation mechanism of enrofloxacin by hydroxyl radicals: A DFT and experiment study","authors":"Wenjing Liu,&nbsp;Aofan Wang,&nbsp;Xinruo Wang,&nbsp;Zhonghua Shen,&nbsp;Jishi Wang,&nbsp;Jie Ma,&nbsp;Yujie Zhao,&nbsp;Zeying He","doi":"10.1016/j.jhazmat.2025.137950","DOIUrl":"10.1016/j.jhazmat.2025.137950","url":null,"abstract":"<div><div>Fluoroquinolone antibiotics, widely used in daily life, contribute to environmental pollution due to their persistence in natural ecosystems. However, the degradation mechanism of fluoroquinolones remains elusive, which not only hinders the understanding of their environmental behavior but also restricts the development of effective remediations. This study investigates the degradation mechanism of enrofloxacin (ENR) through hydroxyl radicals (•OH), integrating density functional theory (DFT) calculations and experimental validations. The degradation process involves key steps such as bond activation (C–F, C–H, C–C) and decarboxylation, with the C–F bond and decarboxylation identified as rate-limiting steps. Experimental results confirm the theoretical predictions of degradation pathways and major by-products. Toxicity analysis shows that most degradation products exhibit significantly reduced toxicity compared to ENR. This work provides valuable insights into the degradation behavior of fluoroquinolones and lays the groundwork for designing advanced environmental remediation strategies.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"491 ","pages":"Article 137950"},"PeriodicalIF":12.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660470","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
Impact of microplastics on plant biogenic volatile organic compounds emission: A preliminary study
IF 12.2 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-20 DOI: 10.1016/j.jhazmat.2025.138000
Shuqin Liu , Shengmei Feng , Yanping Zhang , Yang Zheng , Ruifen Jiang , Gangfeng Ouyang
{"title":"Impact of microplastics on plant biogenic volatile organic compounds emission: A preliminary study","authors":"Shuqin Liu ,&nbsp;Shengmei Feng ,&nbsp;Yanping Zhang ,&nbsp;Yang Zheng ,&nbsp;Ruifen Jiang ,&nbsp;Gangfeng Ouyang","doi":"10.1016/j.jhazmat.2025.138000","DOIUrl":"10.1016/j.jhazmat.2025.138000","url":null,"abstract":"<div><div>Plants produce biogenic volatile organic compounds (BVOCs) that are essential for interacting with the environment. As emerging pollutants, microplastics (MPs) may influence BVOCs emissions, yet their effects remain poorly underexplored. This study employed headspace solid phase microextraction coupled with gas chromatography – mass spectrum to investigate the impact of MPs on the BVOC emission profiles of lettuce (<em>Lactuca sativa</em>). Our results demonstrated that polystyrene (PS) MPs exposure, even at environmental concentrations (0.5–2 mg/L), significantly altered BVOC profiles, with a marked increase in aldehydes and ketones. A 7-fold increase in phenylacetaldehyde and benzaldehyde at 50 mg/L indicated stress-related metabolic changes, which also evidenced by reduced superoxide dismutase (SOD) activity and shifts in root microbial communities. The key discriminating BVOCs identified suggest that the presence of MPs impact plant survival and adaptability, with emissions originating from various metabolic pathways, including phenylpropanoid, lipoxygenase, and terpenoid synthesis pathways. Furthermore, variations in type, size, and aging treatment of MPs influenced BVOCs emission patterns. Our findings underscore the significance of BVOCs as indicators of exposure risks associated with MPs and highlight the ecological threats posed by these pollutants.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138000"},"PeriodicalIF":12.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665967","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
Sulfide intrusion of seagrass Thalassia hemprichii along a eutrophication gradient with carbonate and terrigenous sediments in tropical coastal sea
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-20 DOI: 10.1016/j.jhazmat.2025.138005
Wenqian Qi, Yijun Liu, Zhijian Jiang, Xu Long, Yang Fang, Uditha Thejan Egodauyana, Yunchao Wu, Songlin Liu, Xiaoping Huang
{"title":"Sulfide intrusion of seagrass Thalassia hemprichii along a eutrophication gradient with carbonate and terrigenous sediments in tropical coastal sea","authors":"Wenqian Qi, Yijun Liu, Zhijian Jiang, Xu Long, Yang Fang, Uditha Thejan Egodauyana, Yunchao Wu, Songlin Liu, Xiaoping Huang","doi":"10.1016/j.jhazmat.2025.138005","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138005","url":null,"abstract":"Seagrasses growing in different eutrophic states in carbonate and terrigenous sediments may exhibit contrasting sulfide intrusion and responses; however, limited information is available. In this study, sulfide intrusion in the tropical typical seagrass <em>Thalassia hemprichii</em> along a eutrophication gradient in carbonate and terrigenous sediments on Hainan Island, South China Sea, was investigated using combined elements, stable isotopes, and photobiology. The sediment porewater sulfide concentration increased with rising nutrient levels, with porewater sulfide as 223.92±25.34 μmol/L when the dissolved inorganic nitrogen concentration was 10.83±0.60 μmol/L and the dissolved inorganic phosphate concentration was 0.39±0.01 μmol/L. The nutrient input significantly enhanced sulfide intrusion in seagrass, resulting in reduced δ<sup>34</sup>S values in roots from 12.78±1.16 to 2.69±0.46‰, with leaf δ<sup>15</sup>N as the greatest explanatory factor. In addition, sulfide intrusion inhibited photosynthesis more strongly in seagrass growing in carbonate sediments than in terrigenous sediments because of the low iron content in carbonate sediments (almost 50% of the iron content in terrigenous sediments), reducing rETR<sub>max</sub> and E<sub>k</sub> by 43.08% and 36.42%, respectively. Therefore, the synergistic effects of nutrient input, sulfide concentration, sediment substrate, and iron content affected the sulfide intrusion in seagrass.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"20 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660459","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
The tolerance mechanism of diarrhetic shellfish toxins mediated by the extracellular regulated protein kinase (ERK) pathway in the mussel Perna viridis
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-20 DOI: 10.1016/j.jhazmat.2025.138006
Jin-jin Lv, Yu-jie Liu, Yan-hang Mo, Li-yan Deng, Yang Liu, Hong-ye Li, Li Zhang, Wei-dong Yang
{"title":"The tolerance mechanism of diarrhetic shellfish toxins mediated by the extracellular regulated protein kinase (ERK) pathway in the mussel Perna viridis","authors":"Jin-jin Lv, Yu-jie Liu, Yan-hang Mo, Li-yan Deng, Yang Liu, Hong-ye Li, Li Zhang, Wei-dong Yang","doi":"10.1016/j.jhazmat.2025.138006","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138006","url":null,"abstract":"Diarrheic shellfish toxins (DSTs) are a class of lipophilic algal toxins that accumulate excessively in bivalves following harmful algal blooms. Bivalves exhibit tolerance to DSTs, which make people ignore or underestimate the risk of DSTs, leading to the occurrence of seafood poisoning incidents. However, the tolerance mechanism remains unclear in bivalves. We investigated the role of extracellular-regulated protein kinase (ERK) in DSTs tolerance, observed that the ERK inhibitor PD98059 exacerbated damage of DSTs to the digestive tubules. PD98059 induced the TUNEL fluorescence intensity, and caspase-3 activity inhibited by DSTs were restored to the control. PD98059 enhanced the fluorescence intensity of extracellular Ca-AM and increased the accumulation of esterified DSTs. Transcriptome analysis revealed that PD98059 affected the genes expression related to apoptosis, ABC transporters, and lipid metabolism. qPCR analysis demonstrated that PD98059 down-regulated the DSTs-induced <em>iap</em> and <em>ABCC10</em> (<em>p</em> = 0.063), and up-regulated <em>ABCB1-like1</em>, <em>ABCC1</em>, <em>ABCC1-like1</em>, and <em>ABCC9</em>. Molecular docking suggested that ABCC10 exhibited high affinity for esterified okadaic acid. Overall, ERK plays a crucial role in DSTs tolerance by regulating the anti-apoptotic system and ABC transporters in bivalves. Our study is of great significance to understand the tolerance mechanism in bivalves and the safety risk caused by DSTs.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"88 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660464","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
Long-term exposure to dust in fine particulate matter and post-stroke functional impairment—Findings from the China National Stroke Screening Surveys
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-20 DOI: 10.1016/j.jhazmat.2025.137979
Zhaoyang Pan, Xueyan Han, Man Cao, Ruohan Wang, Jian Guo, Wei Sun, Jiarun Mi, Yuanli Liu, Tao Xue, Tianjia Guan
{"title":"Long-term exposure to dust in fine particulate matter and post-stroke functional impairment—Findings from the China National Stroke Screening Surveys","authors":"Zhaoyang Pan, Xueyan Han, Man Cao, Ruohan Wang, Jian Guo, Wei Sun, Jiarun Mi, Yuanli Liu, Tao Xue, Tianjia Guan","doi":"10.1016/j.jhazmat.2025.137979","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137979","url":null,"abstract":"The dust component of particulate matter (PM) warrants more attention in the era of climate change and increased frequency of dust event, yet rarely are studies focused exclusively on the long-term health effects of dust PM<sub>2.5</sub>. This study aims to assess the relative toxicity of dust and non-dust PM<sub>2.5</sub> on the long-term functional impairment after stroke. We utilized data from a multicenter, national survey in China from 2013 to 2019 and selected participants with repeated assessments of the functional impairment outcomes, the modified Rankin scale (mRS) score, to form a longitudinal dataset. The dust PM<sub>2.5</sub> exposure data were constructed by combining multiple sources and of high spatial resolution. Fixed effect models were used to estimate the association between dust PM<sub>2.5</sub> exposure and changes in mRS scores. A two-dimensional spline model was used to model the joint effect of dust and non-dust PM<sub>2.5</sub> exposure. We included 28,081 participants (65,883 visits). Per interquartile range increase of the dust PM<sub>2.5</sub> was associated with 0.048 (95% confidence interval [CI]: 0.003-0.092) increase in mRS score. Results of co-exposure to dust and non-dust PM<sub>2.5</sub> showed that the greater the proportion of dust PM<sub>2.5</sub> was, the stronger the combined effect. This study revealed that long-term exposure to dust PM<sub>2.5</sub> was associated with post-stroke functional impairment. More studies on the long-term effects of dust and dust-sourced PM<sub>2.5</sub> on neurological outcomes are warranted in the future.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"70 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666045","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 reshape the peatland plants (Sphagnum) bacteriome under simulated wet-deposition pathway: insights into unequal impact of ecological niches
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-20 DOI: 10.1016/j.jhazmat.2025.138004
Sijing Tang, Jin Qian, Yueming Zhu, Bianhe Lu, Yuxuan He, Yin Liu, Kailin Xu, Junwei Shen
{"title":"Polystyrene nanoplastics reshape the peatland plants (Sphagnum) bacteriome under simulated wet-deposition pathway: insights into unequal impact of ecological niches","authors":"Sijing Tang, Jin Qian, Yueming Zhu, Bianhe Lu, Yuxuan He, Yin Liu, Kailin Xu, Junwei Shen","doi":"10.1016/j.jhazmat.2025.138004","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138004","url":null,"abstract":"Nanoplastics (NPs) enter peatlands through atmospheric deposition, yet their effects on <em>Sphagnum</em> bacterial communities (SBCs) and plant-self remain unknown. We hypothesize that NPs alter the composition, structure, and co-occurrence pattern of epiphytes (Epi) and endophytes (En), thereby differentially affecting the growth and physiological performance of <em>Sphagnum</em>. The 30-day simulated wet deposition experiment was conducted to test this. Here, polystyrene NPs reduced the <em>α-diversity</em> of SBCs, unevenly reshaped the structure of Epi and En. Mfuzz clustering was used to reveal the co-abundance behavior of SBCs, and the null model found SBCs relied on stochastic assembly, formed stable Epi molecular ecological network (MEN) and connected En MEN. NPs disrupted symbiosis of SBCs, with high-abundance phyla reductions impacting MENs and low-abundance phyla affecting the inter-domain ecological network (IDEN) between Epi and En. Increasingly positive NPs (from carboxyl-modified to unmodified, and then to amino-modified NPs) further decreased SBCs abundance. Key clusters of <em>Proteobacteria</em> (<em>Pro.</em>), with <em>α-Pro.</em> and <em>γ-Pro.</em> as module hubs of MENs, and <em>β-Pro.</em> as a network hub in the IDEN, could reflect these changes. Additionally, NPs lowered plant spread area (P &lt; 0.05) and chlorophyll content (P &lt; 0.01), but the reduction in biomass was not significant. Structural equation modeling showed reduced SBCs α-diversity alleviated the NPs phytotoxicity (up to 33.31% offset), as genetic analysis revealed that methane oxidation, carbon fixation, and trace element metabolism may upregulate plant nutrient supply. Our findings offer critical insights into NPs deposition risks in remote areas and highlight the responses of plant-bacteriome symbiosis.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"27 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665965","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
Deciphering the source contribution of microplastics in the glaciers of the North-Western Himalayas
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-19 DOI: 10.1016/j.jhazmat.2025.137975
Shahid Ahmad Dar, Khalid Muzamil Gani
{"title":"Deciphering the source contribution of microplastics in the glaciers of the North-Western Himalayas","authors":"Shahid Ahmad Dar, Khalid Muzamil Gani","doi":"10.1016/j.jhazmat.2025.137975","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137975","url":null,"abstract":"Microplastics (MPs) and nanoplastics (NPs) have been largely studied in marine environments, but there lies a significant gap in assessing their occurrence and impacts in glacier environments. This study investigates the occurrence and pollution risks of MPs and NPs in glaciers, suspended air, and dry deposition across the northwestern Himalayas. MPs concentration ranged from 1000 particles m<sup>-3</sup> in Kolahai glacier to 151000 particles m<sup>-3</sup> in Thajwas glacier. In suspended air, MPs occurred at 5 particles m<sup>-3</sup>, while dry deposition samples showed a concentration ranging from 1-13 particles m<sup>-2</sup> d<sup>-1</sup>. Dynamic light scattering (DLS) confirmed the presence of NPs in all glaciers, with sizes varying between 31-689<!-- --> <!-- -->nm in Thajwas glacier and 360-953<!-- --> <!-- -->nm in Harmukh glacier. HYSPLIT modelling revealed that air masses reaching Himalayan glaciers predominantly originate from global sources (75%). The pollution load index (PLI) ranged from 3.9 (hazard category I) to 40 (hazard category IV), indicating moderate to excessive pollution of glaciers. While as polymer hazard index (PHI) ranged from 10 (hazard category II) to 1987 (hazard category V), indicating medium to extreme danger due to presence of polyvinyl chloride (PVC) and polyacrylonitrile (PAN). The presence of MPs and NPs accelerate glacier melting due to their light absorbing properties underscoring need for further studies.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"18 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654105","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
Insights into the synergistic effects of exogenous glycine betaine on the multiphase metabolism of oxyfluorfen in Oryza sativa for reducing environmental risks
IF 13.6 1区 环境科学与生态学
Journal of Hazardous Materials Pub Date : 2025-03-19 DOI: 10.1016/j.jhazmat.2025.137970
Zhao Jie Chen, Xu Zhen Shi, Ya Nan Qu, Si Ying Li, Gan Ai, Yi Zhuo Wang, Li Qing Zeng, Xiao Liang Liu, Xuesheng Li, Yan Hui Wang
{"title":"Insights into the synergistic effects of exogenous glycine betaine on the multiphase metabolism of oxyfluorfen in Oryza sativa for reducing environmental risks","authors":"Zhao Jie Chen, Xu Zhen Shi, Ya Nan Qu, Si Ying Li, Gan Ai, Yi Zhuo Wang, Li Qing Zeng, Xiao Liang Liu, Xuesheng Li, Yan Hui Wang","doi":"10.1016/j.jhazmat.2025.137970","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.137970","url":null,"abstract":"Glycine betaine (GB), a secondary metabolite that regulates plant responses to biotic and abiotic stresses, may help reduce pesticide phytotoxicity, but this fact remains unestablished. This study investigated the physiological response of rice (<em>Oryza sativa</em>) to six dosages of oxyfluorfen (OFF) (0–0.25<!-- --> <!-- -->mg/L) and two concentrations of GB (0 and 175<!-- --> <!-- -->mg/L). GB treatment counteracted the considerable decrease in rice seedling growth caused by OFF treatment at doses higher than 0.15<!-- --> <!-- -->mg/L. The biochemical processes and catalytic events associated with OFF-triggered degradation in rice were investigated using RNA-Seq–LC–Q-TOF–HRMS/MS after six rice root and shoot libraries were created and subjected to either OFF or OFF–GB. Rice treated with both GB and an ecologically relevant dose of OFF showed a marked upregulation of 1039 root genes and 111 shoot genes compared with those treated with OFF alone. Multiple OFF-degradative enzymes implicated in molecular metabolism and xenobiotic tolerance to environmental stress were identified by gene enrichment analysis. In comparison to treated with 0.25<!-- --> <!-- -->mg/L OFF alone, exogenous GB administration decreased OFF accumulation, with the OFF concentration in roots being 44.47% and in shoots being 51.03%. The production of essential enzymes involved in the OFF decay process was attributed to certain genes with variable expression, including cytochrome P450, methyltransferase, glycosyltransferases, and acetyltransferases. Using LC-Q-TOF-HRMS/MS, 3 metabolites and 16 conjugates were identified in metabolic pathways including hydrolysis, acetylation, glycosylation, and interaction with amino acids in order to enhance OFF-degradative metabolism. All things considered, by reducing phytotoxicity and OFF buildup, external GB treatment can increase rice's resistance to oxidative stress caused by OFF. This study offers valuable insights into the function of GB in enhancing OFF degradation, which may have ramifications for designing genotypes that maximize OFF accumulation in rice crops and promote OFF degradation in paddy crops.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"6 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654107","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
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