环境科学与生态学最新文献

{"title":"Distinct mechanisms of stibnite (Sb2S3) oxidative dissolution mediated by acid-generating and alkali-generating microorganisms within a wide pH range","authors":"Liyuan Ma ,&nbsp;Jingkang Zhang ,&nbsp;Weikang Gao ,&nbsp;Xingjie Wang ,&nbsp;Xiaolu Lu ,&nbsp;Hongmei Wang ,&nbsp;Liran Chen ,&nbsp;Devin J. Sapsford ,&nbsp;Jianwei Zhou","doi":"10.1016/j.jhazmat.2025.138141","DOIUrl":"10.1016/j.jhazmat.2025.138141","url":null,"abstract":"<div><div>Indigenous microorganisms in antimony mining areas facilitate stibnite dissolution over a wide pH range, yet their mechanisms remain poorly studied. Herein, the acid-generating <em>Bosea</em> sp. AS-1 and the alkali-generating <em>Pseudomonas</em> sp. PS-3 were selected to interact with stibnite (Sb₂S₃) under initial acidic (pH value = 5) and alkaline (pH value = 8) conditions, respectively. Results indicated that AS-1 and PS-3 promoted stibnite dissolution compared to the sterile control irrespective of initial pH conditions, but through distinct mechanisms. AS-1 oxidized sulfide to sulfate by regulating the expression of <em>SoxB</em> and <em>SoxC</em> genes, thereby driving the stibnite dissolution and oxidation. Up to 18.63 mg/L total antimony (Sb(tot)) was released and the dissolved Sb(III) was completely oxidized to Sb(V). Moreover, AS-1 prevented the passivation layer formation by inhibiting sulfur oxidation intermediates accumulation. Conversely, PS-3 could not oxidize sulfur, but produced more extracellular polymeric substances which bound microorganisms closely to stibnite. The stibnite dissolution was facilitated through pH elevation from 5.0 to above 9.0 mediated by PS-3, releasing up to 35.56 mg/L Sb(tot). However, the accumulated sulfur oxidation intermediates facilitated the passivation layer formation, inhibiting further dissolution of stibnite. Additionally, less than 44 % of the soluble Sb(III) was oxidized to Sb(V). These results contribute to understanding the microbial-mediated transformation, mobilization and oxidation of antimony.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138141"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758378","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":"Public health concerns of multifaceted exposures to metal and metalloid mixtures: a systematic review","authors":"Godswill J. Udom,&nbsp;David Iyaye,&nbsp;Benjamin Oritsemuelebi,&nbsp;Eudora Nwanaforo,&nbsp;Onyinyechi Bede-Ojimadu,&nbsp;Prosper Manu Abdulai,&nbsp;Chiara Frazzoli,&nbsp;Orish E. Orisakwe","doi":"10.1007/s10661-025-13963-1","DOIUrl":"10.1007/s10661-025-13963-1","url":null,"abstract":"<div><p>Exposure to metals and metalloids presents a significant global public health threat due to their widespread presence in natural, industrial, and occupational environments. These substances, such as arsenic, lead, cadmium, and mercury, accumulate in biological systems, leading to chronic and acute health conditions. The review focuses on investigating the health risks, pathways of exposure, and the associated regulatory frameworks. A review was guided by the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines. Two main databases (PubMed and Toxline) and a search engine (Google Scholar) were searched in September 2024, and 23 articles met the eligibility criteria and were included in the review. The quality of all the articles that met the inclusion criteria was assessed using the Newcastle–Ottawa scale. The review examined exposure pathways in different settings (natural, industrial, and occupational), health outcomes, mechanisms of toxicity, and vulnerable populations. The synthesis highlights the current gaps in regulatory frameworks and identifies areas for future research. Exposure to metals and metalloids occurs through contaminated water, soil, and air in natural settings, and through industrial activities and occupational hazards in sectors like manufacturing, construction, and agriculture. Adverse health outcomes include neurological disorders, cardiovascular diseases, renal dysfunction, and cancers. Vulnerable populations, such as children, pregnant women, and workers in high-risk industries, face elevated risks, with socioeconomic factors and inadequate regulatory protections exacerbating these health disparities. To mitigate the public health risks posed by metal and metalloid exposure, a multifaceted approach is necessary. This includes enhanced environmental monitoring, public awareness campaigns, stricter occupational safety regulations, and international cooperation in pollution control. Future research should prioritize understanding the synergistic effects of metal mixtures and developing innovative strategies for detection and intervention. Safeguarding public health and promoting environmental justice requires urgent action to address the multifaceted impacts of metal exposures.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Effects of Disturbance and Fertilisation on Plant Community Synchrony, Biodiversity and Stability Through Succession","authors":"Janette L. Davidson,&nbsp;Kaitlyn R. McKnight,&nbsp;Megan Szojka,&nbsp;Dustin Gannon,&nbsp;Nathan I. Wisnoski,&nbsp;Chhaya M. Werner,&nbsp;Maowei Liang,&nbsp;Eric W. Seabloom,&nbsp;Courtenay Ray,&nbsp;Melissa H. DeSiervo,&nbsp;Lauren G. Shoemaker","doi":"10.1111/ele.70052","DOIUrl":"https://doi.org/10.1111/ele.70052","url":null,"abstract":"<div>\u0000 \u0000 <p>Global change drivers alter multiple components of community composition, with cascading impacts on ecosystem stability. However, it remains largely unknown how interactions among global change drivers will alter community synchrony, especially across successional timescales. We analysed a 22-year time series of grassland community data from Cedar Creek, USA, to examine the joint effects of pulse soil disturbance and press nitrogen addition on community synchrony, richness, evenness and stability during transient and post-transient periods of succession. Using multiple regression and structural equation modelling, we found that nitrogen addition and soil disturbance decreased both synchrony and stability, thereby weakening the negative synchrony–stability relationship. We found evidence of the portfolio effect during transience, but once communities settled on a restructured state post-transience, diversity no longer influenced the synchrony–stability relationship. Differences between transient and post-transient drivers of synchrony and stability underscore the need for long-term data to inform ecosystem management under ongoing global change.</p>\u0000 </div>","PeriodicalId":161,"journal":{"name":"Ecology Letters","volume":"28 4","pages":""},"PeriodicalIF":7.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749565","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":"Classification of cracking potential for clayey soils based on cyclic wet-dry tests","authors":"Hui-Cong Yu,&nbsp;Ling Zeng,&nbsp;Xin-Yang Wu,&nbsp;Qian-Feng Gao,&nbsp;Han-Bing Bian,&nbsp;Jin-Tao Luo,&nbsp;Jing-Cheng Chen,&nbsp;Hong-Ri Zhang","doi":"10.1007/s12665-025-12210-7","DOIUrl":"10.1007/s12665-025-12210-7","url":null,"abstract":"<div><p>The substantial development of desiccation cracks profoundly impacts the mechanical and hydraulic properties of clayey soils, potentially leading to various engineering challenges such as slope failures. Therefore, identifying the soil’s cracking potential is crucial for guiding engineering design and construction processes. The aim of this study was to propose a method for cracking potential classification for clayey soils. To this end, standard cyclic wet-dry tests, capable of maximizing the soil’s cracking potential, were proposed based on an analysis of the cracking behavior of lateritic soils under different wet-dry conditions. Subsequently, the cracking characteristics of several typical clayey soils (i.e., lateritic soil, kaolinite, bentonite, and attapulgite) were examined by standard cyclic wet-dry tests. Finally, a novel method for cracking potential classification of clayey soils was proposed incorporating the entropy weighting method. The results show that the most significant degree of cracking in lateritic soil is observed under vacuum saturation and 60°C oven-drying, which is identified as the standard wet-dry condition. When the crack development stabilizes after multiple standard wet-dry cycles, the cracking potential of the soil is characterized by parameters such as the total crack length, maximum crack width, surface crack rate and the fractal dimension of the cracks. On this basis, a classification method is proposed to categorize the cracking potential of clayey soils into five levels: extremely weak, weak, medium, strong, and extremely strong. The cracking potential of different clayey soils was evaluated using this method, revealing that bentonite exhibited the highest cracking potential, classified as \"extremely strong\".</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Magnetically enhanced Fe3O4@ZnO and Fe3O4@ZnO@Bi2O2.7 composites for efficient UV and visible light photodegradation of methyl orange and ofloxacin","authors":"Oksana Makota ,&nbsp;Maksym Lisnichuk ,&nbsp;Jaroslav Briančin ,&nbsp;Jozef Bednarčík ,&nbsp;Oleksandr Bondarchuk ,&nbsp;Inna Melnyk","doi":"10.1016/j.chemosphere.2025.144365","DOIUrl":"10.1016/j.chemosphere.2025.144365","url":null,"abstract":"","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"377 ","pages":"Article 144365"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical oxidation for the rapid degradation of emerging contaminants: Insights into electrolytes and process parameters for phytotoxicity reduction","authors":"Camila F. Zorzo ,&nbsp;Louidi L. Albornoz ,&nbsp;Andréa M. Bernardes ,&nbsp;Valentín Pérez-Herranz ,&nbsp;Fernando H. Borba ,&nbsp;Salatiel W. da Silva","doi":"10.1016/j.chemosphere.2025.144363","DOIUrl":"10.1016/j.chemosphere.2025.144363","url":null,"abstract":"<div><div>Atrazine (ATZ), carbamazepine (CBZ), and sulfamethoxazole (SMX) are contaminants of emerging concern (CECs) commonly detected in water sources, posing a risk to health, sanitation, and the ecosystems. This study evaluates the degradation, mineralization, and phytotoxicity reduction of a solution containing these three CECs using an electrochemical advanced oxidation process (EAOP). Key operational parameters – pH, flow rate (<em>Q</em>), current density (<em>j</em>), and type and concentration of supporting electrolytes (NaCl and Na₂SO₄) – were systematically investigated. The results showed that pH had minimal impact on the process. Higher flow rates (250 L h⁻¹) improved mineralization due to enhanced mass transfer to ^•OH on the anode surface. However, the flow rate had less effect on degradation, as the dominant degradation mechanisms involved chlorine- or sulfate-based oxidants. Current densities of 1 and 10 mA cm⁻² produced the most favorable results, leading to efficient degradation and mineralization, along with satisfactory mineralization current efficiency (up to 47 %) and energy consumption values (91,76–3142,88 kW h kg⁻¹). When NaCl was used as supporting electrolyte, the degradation of CECs was twice as fast as with Na₂SO₄, achieving over 88 % degradation in 5 min and 40 % mineralization within 60 min. While chlorinated and sulfate species enhance process efficiency, excessive electrolyte concentration should be avoided to prevent scaling and ^•OH scavenging. Phytotoxicity tests with <em>Allium cepa</em> revealed an unexpected reduction in toxicity in samples treated with NaCl, suggesting that Na₂SO₄ may be more phytotoxic under the tested conditions.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"377 ","pages":"Article 144363"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Boosting virus enrichment with macroporous magnetic sorbent based on ketoenamine covalent organic framework","authors":"Bo'ou Li, Fei Wang, Xiaonan Dong, Yuchang Li, Tao Jiang, Xiaojie Ma, Xiaoping Kang, Bo Wang","doi":"10.1016/j.jhazmat.2025.138157","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138157","url":null,"abstract":"Effective surveillance and discovery of emerging and reemerging infectious viruses are crucial for predicting and controlling epidemic outbreaks. However, these efforts are significantly hindered by the low-titer existence of genetically diverse viruses in most field samples. Here, we report a macroporous-structured magnetic sorbent based on β-ketoenamine covalent organic framework (COF). Leveraging the combined advantages of the chemical and nanotopographical properties of the COF surface, along with the high accessibility of this active surface within the macroporous matrix, the COF-based adsorbent demonstrates enrichment capabilities for a wide range of viruses with varying structural features. These include Tick-borne encephalitis virus, Influenza virus H9N2 subtype, Severe acute respiratory syndrome coronavirus-2, Herpes simplex virus, Japanese encephalitis virus, Adeno virus, Bacteriophage MS2 and Enterovirus 71, achieving an enrichment efficiency exceeding 80%. Notably, the COF-based sorbent enables a remarkable 9-fold reduction in the threshold concentration required for virus detection via quantitative polymerase chain reaction, demonstrating its immense potential for early virus detection and discovery.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"38 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758136","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":"PM2.5 exacerbates nasal epithelial barrier dysfunction in allergic rhinitis by inducing NLRP3-mediated pyroptosis via the AhR/CYP1A1/ROS axis","authors":"Jiasheng Yuan, Zhihuai Liao, Xinhua Zhu, Yaqiong Zhu, Shuhong Wu, Liqing Guo, Yanpeng Fu, Yuehui Liu","doi":"10.1016/j.jhazmat.2025.138145","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138145","url":null,"abstract":"Fine particulate matter (PM_2.5), a major air pollutant, plays a critical role in exacerbating respiratory diseases such as allergic rhinitis (AR) by inducing inflammation. While its association with AR is well established, the precise mechanisms by which PM_2.5 triggers pyroptosis and compromises nasal epithelial barrier integrity remain unclear. This study investigates the role of PM_2.5 in promoting pyroptosis in nasal epithelial cells and its contribution to AR pathogenesis. Clinical analysis revealed significantly elevated levels of NLRP3 inflammasomes and pyroptosis-related proteins in the nasal mucosa of patients with AR compared with the control group. <em>In vitro</em> and <em>in vivo</em> experiments further demonstrated that PM_2.5 exposure led to a dose-dependent increase in these markers in nasal epithelial cells and AR mouse models. Functional studies using NLRP3 agonists and inhibitors confirmed that PM_2.5 induces NLRP3-mediated pyroptosis, resulting in tight junction protein degradation and compromised epithelial barrier integrity. Mechanistic investigations showed that PM_2.5 activates the aryl hydrocarbon receptor (AhR) pathway, driving the transcription of cytochrome P450 1A1 (CYP1A1) and increasing reactive oxygen species (ROS) production. Notably, AhR downregulation alleviated PM_2.5-induced pyroptosis and epithelial barrier dysfunction, whereas CYP1A1 overexpression reversed these protective effects, highlighting the pivotal role of the AhR/CYP1A1/ROS axis in mediating PM_2.5-induced epithelial damage. In conclusion, this study uncovers a novel mechanism by which PM_2.5 promotes NLRP3-mediated pyroptosis through the AhR/CYP1A1/ROS signaling pathway, ultimately leading to epithelial barrier disruption and AR exacerbation. These findings highlight the urgent need for strategies to minimize PM_2.5 exposure and mitigate its detrimental effects on respiratory health.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"183 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758140","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":"Evaluating nutrient circularity in integrated aquaculture systems: criteria and indicators","authors":"Killian Chary, Christophe Jaeger, Henrice M. Jansen, Souhil Harchaoui, Joel Aubin","doi":"10.1016/j.jclepro.2025.145414","DOIUrl":"https://doi.org/10.1016/j.jclepro.2025.145414","url":null,"abstract":"Nutrient circularity is an application of circular economy principles that addresses issues such as nutrient accumulation or loss, and a shift away from fossil and synthetic fertilisers. The concept is increasingly being explored and is relevant for managing nutrients more sustainably in agri- and aquaculture systems, but the standards by which nutrient circularity can be evaluated require further clarification, and quantitative indicators should be established. Identifying the nutrient circularity performance of integrated aquaculture systems is particularly relevant to better understand how the combination of multiple and complementary species farmed or naturally present in these systems can upcycle nutrients from waste. The main objectives of this study were to improve understanding of nutrient circularity and clarify how to quantify it for (integrated) aquaculture systems. To this end, criteria for describing nutrient circularity were first defined based on a literature review, and quantitative indicators were then identified for each criterion to create an indicator framework. Finally, this framework was applied to three contrasting experimental integrated aquaculture systems (i.e. aquaponic, biofloc and polyculture pond) and their conventional monoculture system counterparts from previous studies to test its ability to compare nutrient circularity in aquaculture systems. Six complementary criteria (and 21 associated indicators) for describing nutrient circularity were identified: productivity, efficiency, self-sufficiency, recycling, regeneration, diversity and complementarity. These criteria, related to circularity principles, provided a clear framework for evaluation. Application of the framework indicated that the integrated systems evaluated usually outperformed conventional monoculture systems, which highlighted the potential of integrated systems to manage nutrients more sustainably. These contrasting integrated systems showed that different pathways (e.g., microbial loops, complementarity between farmed species) can be mobilised to create and (re-)cycle nutrients. Although relatively simple indicators were developed, lack of data prevented quantification of several indicators and thus a full comparison of the systems. Overall, this study helps clarify the concept of nutrient circularity and supports the development of integrated farming systems for more sustainable use of nutrients.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"75 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758248","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":"Accelerating biodegradation efficiency of low-density polyethylene and its hazardous dissolved organic matter using unexplored polyolefin-respiring bacteria: New insights on degradation characterization, biomolecule influence and biotransformation pathways","authors":"Maseed Uddin, Swathi Krishnan Venkatesan, Subhan Kumar Pal, Ravikrishnan Vinu, Karthikeyan Sekar, Ramani Kandasamy","doi":"10.1016/j.jhazmat.2025.138144","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138144","url":null,"abstract":"The COVID-19 outbreak has significantly increased low-density polyethylene (LDPE) waste in landfills, posing new environmental risks due to the release of hazardous dissolved organic matter (DOM). Current LDPE degradation technologies are inadequate and are restricted by a limited understanding of the biotransformation pathway. This study aims to accelerate the biodegradability of LDPE and DOM using <em>Morganella morganii</em> PQ533186 isolated from LDPE-laden municipal landfill. The <em>in-vitro</em> LDPE biodegradation demonstrated a 42.18% weight loss within 120 days. The accelerated biodegradability of LDPE by <em>M. morganii</em> is attributed to the concurrent production of biocatalysts and bio-amphiphiles, coupled with effective bacterial colonization on LDPE surfaces. The FT-IR analysis reveals oxidation with enhancement in O-H (11.29-folds), C=O (17.65-folds), C=C (6.70-folds), C-O (8.51-folds), and C-O-C (6.37-folds) indices. The DSC and XRD analyses divulge reduced crystallinity (33.57%) and increased interplanar d-spacing of (110) and (200) reflections from 4.09 and 3.71<!-- --> <!-- -->Å to 4.17 and 3.80<!-- --> <!-- -->Å, respectively. The Raman, XPS, TG-DTG, and Contact-angle measurements demonstrate reduced density, carbon content, thermal stability, and hydrophobicity. The degradation was confirmed using ¹H NMR, GC-MS, and Py/GC-MS analyses. Furthermore, DOM released from LDPE biodegradation, comprising monomers and additives was biodegraded with an 84.61% COD reduction within 6 days. The mechanistic investigation elucidated a two-stage oxidoreductase and hydrolase-mediated LDPE biotransformation pathway involving biocatalytic oxidation and DOM release. Subsequently, the released DOM undergoes terminal biocatalytic oxidation, yielding simpler non-toxic end products. The present study is the first report to present novel insights into the degradation characterization, pivotal contribution of biomolecules, and in-depth biotransformation pathways which are responsible for the accelerated degradation of both LDPE and hazardous DOM.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"38 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758377","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}