Journal of Hazardous Materials最新文献

{"title":"Maximizing Toughness and Accelerating In-Outdoor Degradation of PLA Films with Modified Cellulose Nanocrystals to Enhance Agricultural Practices","authors":"Haicheng Huang, Chaopei Chen, Somia Yassin Hussain Abdalkarim, Yuheng Liu, Kaiwei Chen, Sherif Mehanny, Hou-Yong Yu","doi":"10.1016/j.jhazmat.2025.138738","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138738","url":null,"abstract":"Polylactic acid (PLA) is widely used in crop protection but faces challenges such as low toughness and unpredictable degradation rates. This study addresses these limitations by developing a green and durable mulch film incorporating citric acid-modified cellulose nanocrystals (CA-CNC) as an interfacial compatibilizer in PLA. Adding CA-CNC enhances the orientation of PLA molecular chains, thereby improving tensile ductility. Specifically, incorporating 5% CA-CNC significantly increased tensile strength by 28.2%, while toughness surged by 190.1%. Mulch films were subjected to indoor UV light and outdoor degradation in soil and cultivation environments (using soybean as a case study) to explore degradation mechanisms. Notably, the mulch film with 5% CA-CNC completely fragmented after 140 days of soil degradation, representing a higher degradation rate of 31.9%. Meanwhile, the degradation rates observed after 90 days of outdoor cultivation environment degradation (9.8%) and 30 days of indoor UV degradation (2.8%) exhibit distinctions compared to outdoor soil degradation. Further analyses of changes in the physicochemical properties of mulch film confirmed the degradation mechanisms. This study provides valuable insights for estimating short-term indoor and long-term outdoor degradation of mulch films, underlining their significance in sustainable agricultural practices.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"12 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154039","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":"Efficient simultaneous degradation and dechlorination of Chlorophenylacetonitrile by vacuum ultraviolet-sulfite advanced reduction system","authors":"Feifei Wang, Haiting Zhang, Weiran Qin, Chiquan He, Sung Kyu Maeng, Jan Hofman, Wenhai Chu","doi":"10.1016/j.jhazmat.2025.138768","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138768","url":null,"abstract":"Disinfection by-products (DBPs) in chlor(am)inated drinking water and wastewater pose risks to human health and ecological safety. Studies on the degradation of the formed DBPs, especially aromatic DBPs, are quite limited. Recently, advanced reduction processes (ARPs), generating highly reactive reductive radicals to break the carbon-halogen bonds, as an emerging technology for refractory organic compound degradation has attracted attention. This study, for the first time, explored the degradation of a representative nitrogenous and aromatic DBP, 2-chlorophenylacetonitrile (2-CPAN), by VUV/UV/sulfite-based ARP system, and investigated the underlying mechanisms and influencing factors. The results demonstrated that VUV/UV/sulfite process achieved over 98.6% and 86.8% degradation of 2-CPAN from tap water and wastewater within 60<!-- --> <!-- -->minutes although inorganic ions existing in real waters slightly inhibited its degradation, highlighting its potential for practical application in real waters. Due to VUV direct photolysis and the generation of more reactive species, VUV/UV/sulfite exhibited superior performance in 2-CPAN degradation (98%) than UV/sulfite (81%). Furthermore, VUV/UV/sulfite process maintained a stable degradation efficiency across a wide range of pH (5-11) and sulfite dosages (0.25-5.0<!-- --> <!-- -->mM), and achieved 90% degradation even under oxic conditions. Mechanism studies confirmed the presence of hydrated electrons (e⁻_aq), hydroxyl radicals, and hydrogen radicals in VUV/UV/sulfite system, with e⁻_aq identified as the primary contributor to 2-CPAN degradation. Chlorine in 2-CPAN was primarily released as chloride ions, achieving 94% dehalogenation within 15<!-- --> <!-- -->minutes. The above findings revealed that VUV/UV/sulfite could be a promising technology for aromatic DBP degradation in real waters.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"12 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153825","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":"Disinfection by-products in indoor swimming pools: A critical review to prioritize commonly occurring species and influencing factors","authors":"Ghulam Hussain ,&nbsp;Haroon R. Mian ,&nbsp;Kasun Hewage ,&nbsp;Andrea J. MacNeill ,&nbsp;Rehan Sadiq","doi":"10.1016/j.jhazmat.2025.138739","DOIUrl":"10.1016/j.jhazmat.2025.138739","url":null,"abstract":"<div><div>Despite the reported occurrence of several disinfection by-products (DBPs) in swimming pools, it is challenging to identify important DBP species due to strewn and conflicting information about their occurrence and importance in the literature. There is a need to provide clear direction and decisive information to support regulators' and pool facilities' efforts to control DBPs. In this review, alongside providing detailed occurrence data, we have developed a novel prioritization approach to classify DBPs as <em>Tier-1</em> (<em>critical</em> priority), <em>Tier-2</em> (<em>medium</em> priority), and <em>Tier-3</em> (<em>low</em>-priority) DBPs in chlorinated indoor swimming pools (ISPs). After compiling an exhaustive database of published literature on chlorinated ISPs, DBP species were evaluated on a defined scoring system based on their occurrence (concentration levels and reported frequency) and toxicity. The normalized aggregated scores from these criteria were used to prioritize the DBPs. The DBPs identified as <em>Tier-1</em> species with the highest occurrence and potential toxicity include Trichloromethane (TCM), Trichloroacetic acid (TCAA), and Dichloroacetic acid (DCAA). Respectively, ten DBP species were identified in <em>Tier-2</em> and fifteen in <em>Tier-3</em>. Implications of the prioritization results for regulatory agencies, pool facilities, and researchers have been provided. Furthermore, a comparative analysis of the available studies, that described the correlation of water quality and pool operational factors with <em>Tier-1</em> DBPs, was carried out. The identified <em>critical</em> factors include the number of swimmers, free residual chlorine, disinfection methods, total organic carbon (TOC), and temperature. These factors can be used to control the formation of DBPs and reduce the associated risk, especially for <em>Tier-1</em> species.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"495 ","pages":"Article 138739"},"PeriodicalIF":12.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153822","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":"Screening and Discovery of Volatile Allergenic Components from Artemisia Ordosica in Yulin Region of Northern China","authors":"Xiaoxue Mo, Cheng Wang, Yi Shan, Siqi Wang, Wen Yang, Zhaomin Xia, Zhanguo Qiao, Tao Zhang, Yuanyuan Ding, Rui Liu, Huaizhen He, Langchong He","doi":"10.1016/j.jhazmat.2025.138759","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138759","url":null,"abstract":"Allergic diseases are on the rise globally, and Mas-related G protein-coupled receptor X2 (MRGPRX2) has been identified as a key receptor mediating allergic diseases and pseudo-allergic reaction. The <em>artemisia ordosica</em> and other <em>artemisia</em> species are widely distributed in the Northern Hemisphere, and has been demonstrated a strong association with allergic diseases, yet the specific allergenic substances are unclear. This study investigated <em>artemisia ordosica</em> as potential source of allergens. Combining the MRGPRX2-His-tag@VS/CMC model with gas chromatography–mass spectrometry (GC–MS) analysis, five volatile components were identified as allergenic substances, including <em>α</em>-curcumene, (1<em>S</em>)-(-)-<em>α</em>-pinene, (1<!-- --> <em>R</em>)-(+)-<em>α</em>-pinene, (-)-<em>β</em>-pinene, and (<em>R</em>)-(+)-limonene. Among these, α-Curcumene, a relatively abundant compound, exhibited the strongest allergenic activity both in vitro and in vivo models, inducing the release of <em>β</em>-hexosaminidase, histamine, and cytokines from mast cells in a dose-dependent manner. Furthermore, both the identified mixture of allergenic components and <em>α</em>-curcumene alone exhibited comparable allergenic activity to the <em>artemisia ordosica</em> extract in both local and systemic allergic reactions in mice. Notably, the total content of volatile allergenic components increased gradually with plant growth, reaching substantially higher levels in August and September, coinciding with higher average temperatures. To the best of our knowledge, this study is the first to identify the volatile allergenic components in <em>artemisia ordosica</em> and reveal their content variation throughout its growth cycle. Given the widespread distribution of <em>artemisia</em> species in various regions of the Northern Hemisphere and the shared presence of volatile allergenic components, these findings offer a valuable experimental basis for the prevention and treatment of allergic diseases in areas where artemisia species are cultivated.<h3>Synopsis</h3>This study highlights the importance of investigating the volatile allergenic components of a<em>rtemisia ordosica</em> in the Yulin region. The identification of these allergenic components warrants further attention to the potential health risks associated with <em>artemisia ordosica</em>, especially concerning allergic diseases","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"26 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154152","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":"C3H8 oxidation on atomic-scale catalysts: insights into active oxygen species and reaction pathways","authors":"Qifeng Zhang, Yuchun Song, Aijie Xu, Zhi-Qiang Wang, Li Wang, Yanglong Guo, Aiyong Wang, Wangcheng Zhan, Yun Guo","doi":"10.1016/j.jhazmat.2025.138716","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138716","url":null,"abstract":"Compared to nano-catalysts, atomic-scale dispersed catalysts offer greater potential for elucidating the fundamental nature of catalytic reactions. To investigate the role of ultra-low Ru loading (0.1<!-- --> <!-- -->wt%) in C₃H₈ oxidation, single-atom (Ru/CeO₂-SA), dual-pair (Ru2/CeO₂), and tetra-atomic cluster (Ru4/CeO₂) catalysts were employed. Loading Ru on CeO₂ suppressed C₃H₈ adsorption while modulated oxygen activation, thereby influencing the reaction intermediates and engineering the propane oxidation pathways. Notably, Ru/CeO₂-SA and Ru4/CeO₂ exhibited superior propane oxidation performance compared to Ru2/CeO₂ under both hydrated and anhydrous conditions. Ru/CeO₂-SA achieved remarkable turnover frequency (TOF) of 43.7 ⁎ 10^{-2<!-- -->}s^-1 at 280 °C and 50% conversion temperature (T₅₀) as low as 267 °C, which surpassed Ru2/CeO₂ (TOF = 16.7 ⁎10^{-2<!-- -->}s^-1, T₅₀ = 365 °C) and Ru4/CeO₂ (TOF = 33.1⁎10^{-2<!-- -->}s^-1, T₅₀ = 330 °C), highlighting the critical role of single-atom architecture in enhancing catalytic efficiency. This enhanced performance was attributed to the formation of acrylic acid intermediates, facilitated by the surface lattice oxygen of CeO₂ adjacent to Ru. In contrast, the propionic acid generated from chemisorbed oxygen on Ru2/CeO₂ demonstrated a weaker promoting effect compared to acrylic acid. Additionally, the rapid oxidation of acetate to formate by lattice oxygen further contributed to the enhanced catalytic activity.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"26 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154266","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":"Pseudo-color-assisted aggregation-induced emission dye biosensor for \"label-free\" monitoring of ochratoxin A signals in plants","authors":"Meng Wu, Sutong Li, Qiang Wu, Mengfan Hu, Limei Huang, Xiangyang Li","doi":"10.1016/j.jhazmat.2025.138770","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138770","url":null,"abstract":"Ochratoxin A (OTA) is a fungal toxin that is highly toxic and widely distributed, causing serious damage to important economic crops. Understanding their presence in plants can help protect economic crops from infection. In this work, a \"label-free\" OTA sensing probe that directly uses aptamer sequences to achieve targeted response was prepared. The aptamer hybridized with cDNA can resist digestion by exonuclease (EXO.I), while the presence of OTA competes with the aptamer and disrupts the resistance process. The entire sensing process can be monitored by the fluorescent indicator aggregation-induced emission dye (QAFI). The sensing method has a detection limit of 17 pM and a linear range of 0.05-150<!-- --> <!-- -->nM. This fluorescent probe can not only perform on-site analysis of OTA in vitro, but can also be easily incubated into plants for fluorescence monitoring. More importantly, in view of the problem that the single-color presentation of traditional fluorescence images is not easy to observe, this work uses Java algorithms to develop a pseudo-color one-key conversion applet. This greatly saves researchers time in analyzing images. On this basis, this work explores the characteristics of OTA infection in plants under various physiological states, which has a certain reference significance for the planting and cultivation of crops.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"240 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153821","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":"Mixing of zeolite facilitates re-sequestration of heavy metals via generated Fe-(oxyhydr)oxides in sediments in the presence of NO3- compared to capping","authors":"Gen Li, Tianshi Cheng, Xinpeng Wang, Zheng Zheng, Xionghan Feng","doi":"10.1016/j.jhazmat.2025.138774","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138774","url":null,"abstract":"Under nitrate-rich conditions, microbially-driven nitrate reduction (as electron acceptor) mediates the transformation of oxidizable heavy metal (HM) species into acid-soluble and reducible fractions, concomitant with enhanced metal mobilization into overlying water. This study investigates the impact of zeolite application modes—capping and mixing—on controlling HM release with NO₃^- addition. Compared to capping, mixing provides a more sustained inhibition of upward HMs release from sediment. Furthermore, a significant decrease in HM concentrations in overlying water is observed when experiments ended, indicating that sediments transition from being a source to a sink of HMs. Additionally, the study reveals a two-stage Fe(II) oxidation process in sediment, characterized by an initial slow oxidation phase followed by a rapid reaction phase. The distribution of HM fractions suggests that Fe-(oxyhydr)oxides generation is the primary reason for HMs re-sequestration. Therefore, the two-stage Fe(II) oxidation process coupled with zeolite regulates HM mobilization behavior. During the sediment's transition to a pollution source phase (characterized by limited Fe-(oxyhydr)oxides formation), zeolites adsorb dissolved metals from interstitial water. Conversely, upon progression to the pollution sink phase (marked by extensive Fe-(oxyhydr)oxides generation), adsorbed metals by zeolite redistribute into newly-formed Fe-(oxyhydr)oxides, thereby regenerating zeolites' adsorption capacity for HMs.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"153 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153823","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":"Prediction of By-Product Generation in Gaseous Ultraviolet Photocatalytic Oxidation Processes","authors":"Jing Wu, Lexuan Zhong","doi":"10.1016/j.jhazmat.2025.138767","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138767","url":null,"abstract":"By-product generation poses a significant challenge in ultraviolet photocatalytic oxidation (UV-PCO) processes for removing gaseous volatile organic compounds (VOCs). It must be carefully addressed when evaluating and optimizing UV-PCO-based air purifiers. This study establishes a comprehensive modeling framework to predict and mitigate by-product generation in UV-PCO systems, bridging a critical research gap. Regression models for water adsorption coefficients (&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;K&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;w&lt;/mi&gt;&lt;mo is=\"true\"&gt;,&lt;/mo&gt;&lt;mi is=\"true\"&gt;i&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.548ex\" role=\"img\" style=\"vertical-align: -0.812ex;\" viewbox=\"0 -747.2 1897.4 1096.9\" width=\"4.407ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMATHI-4B\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(849,-150)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMATHI-77\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(506,0)\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2C\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(703,0)\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMATHI-69\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;K&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;w&lt;/mi&gt;&lt;mo is=\"true\"&gt;,&lt;/mo&gt;&lt;mi is=\"true\"&gt;i&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;msub is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;K&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;w&lt;/mi&gt;&lt;mo is=\"true\"&gt;,&lt;/mo&gt;&lt;mi is=\"true\"&gt;i&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;), adsorption coefficients (&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub is=\"true\"&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;K&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;i&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.317ex\" role=\"img\" style=\"vertical-align: -0.582ex;\" viewbox=\"0 -747.2 1193.8 997.6\" width=\"2.773ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMATHI-4B\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(849,-150)\"&gt;&lt;g is=\"true\"&gt;&lt;use transform=\"scale(0.707)\" xlink:href=\"#MJMATHI-69\"&gt;&lt;/use&gt;&lt;/","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"50 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154154","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":"Quantifying Post-Dam Anthropogenic Mercury Accumulation in Three Gorges Reservoir Sediments Using Mercury Isotopic Signatures","authors":"Ge Zhang, Haijian Bing, Wei Yuan, Ruidong Yang, Xun Wang","doi":"10.1016/j.jhazmat.2025.138773","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138773","url":null,"abstract":"The Three Gorges Reservoir (TGR) is the largest hydroelectric power facility in the world. Mercury (Hg) accumulation in sediment of the TGR has been highly concerned because of its far-reaching impacts on aquatic safety and human health. However, effects of hydrological modification on Hg accumulation processes after the full operation of the Three Gorges Dam (TGD) remain elusive. Here, we explored the dynamic accumulation of Hg in the mainstream sediment of water-level fluctuation zone in the whole TGR region during 2016-2020 and quantified the anthropogenic contribution to Hg accumulation by Hg stable isotopes. We found that the Hg concentration in sediment increased by ~50% when compared with the level before full operation of TGD. Furthermore, ~7.0 Mg yr^-1 of Hg has been trapped in sediment since the year of 2016. Anthropogenic release directly contributed to 37±15% of Hg accumulation in sediment of the whole TGR region, of which up to 62±19% originated from the nearby megacity of Chongqing City. Results indicate that the long-term monitoring of Hg in sediment of the TGR and regulating industrial discharges from Chongqing are needed to avoid negative impacts on aquatic safety, specifically under the context of continuous sediment trapping and extreme climate.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"58 1","pages":"138773"},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165603","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":"Impact of nanoplastics on the algicide efficacy of CuSO4 against Microcystis aeruginosa and the release of microcystin: A physiological and metabolomic analysis","authors":"Xiayida Mamatimin, Wei Song, Mihebai Yilimulati, Tiandou Zhang, Nuzahat Habibul","doi":"10.1016/j.jhazmat.2025.138766","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138766","url":null,"abstract":"CuSO₄ is frequently employed as a control measure for the emergency treatment of cyanobacterial harmful algal blooms. Concurrently, nano-plastics (NPs) have emerged as pervasive pollutants exacerbating the threat of eutrophication to aquatic ecosystem. However, there is little known regarding the influence of NPs on the efficacy of copper sulfate (CuSO₄) in controlling cyanobacterial harmful algal blooms (cyanoHABs). Here, we demonstrate that the co-existence of polystyrene nanoplastics (PS NPs) exacerbates the negative effects of CuSO₄ to photosynthetic activity of <em>Microcystis aeruginosa</em>. This is caused via the differences in disrupting light energy absorption, inactivation of the reaction center, as well as disruptions in electron transport and metabolic pathways, which collectively induce oxidative stress and damage cell membrane. Treatment with either NPs or CuSO₄ alone results in the downregulation of carbon-fixation, the tricarboxylic acid cycle, and pyruvate metabolism. Co-existence of NPs significantly influenced ABC transporters, carbon fixation, and the two-component system in <em>M</em>. <em>aeruginosa</em>. Notably, while single CuSO₄ treatment increased microcystin- leucine arginine (MC-LR) levels by 243.3% relative to controls, combining CuSO₄ with NPs (PS, PS-NH₂, PS-COOH) significantly reduced MC-LR concentrations by 73.5%, 90.2%, and 70.7%, respectively (p &lt; 0.05). This study demonstrated that NPs exacerbated the oxidative stress induced by CuSO₄ on <em>M</em>. <em>aeruginosa</em> cell, while concurrently reducing MCs release. Furthermore, the underlying molecular mechanisms were systematically investigated. These findings provided novel insights into the crucial importance of considering NPs impact prior to the application of CuSO₄ for the management of (cyanoHABs).<h3>Environmental Implications</h3>CuSO₄ is frequently used as an algicide for urgent cyanobacteria bloom control and is widely used in worldwide. NPs might directly interact with Cu²⁺, affecting Cu²⁺ concentration, or they might have an indirect effect by altering g cyanobacteria's physiology, distribution, or behavior before Cu²⁺ is applied and thereby impacting their tolerance to Cu²⁺. This study revealed that co-existence of NPs and CuSO₄ exacerbates the negative effects of CuSO₄ to photosynthetic activity and altered metabolism of Microcystis aeruginosa. Most importantly, co-existence of NPs with CuSO₄ decreased MC-LR content in the water. Our research highlights the need to consider local stressors, like human-made pollutants such as nanoplastics, before using CuSO₄ to manage cyanoHABs.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"35 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154153","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}