Journal of hazardous materials最新文献

{"title":"Antibiotic-driven mechanisms in endogenous partial denitrification (EPD): Nitrite accumulation, microbial adaptation, functional gene responses and resistance gene proliferation.","authors":"Baodan Jin, Zhixuan Bai, Yeyu Yan, Hua He, Jingjing Du, Yuanqian Xu, Lan Wang, Jiantao Ji","doi":"10.1016/j.jhazmat.2026.142257","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142257","url":null,"abstract":"<p><p>The mechanisms by which antibiotics affect Endogenous Partial Denitrification (EPD) systems remain unclear. This study investigated the relationships between antibiotic type and pollutant removal, along with the underlying microbial metabolic mechanisms in an EPD system exposed to three antibiotics. The results showed that sulfadiazine (SD) and sulfamethoxazole (SMZ) exhibited higher chemical oxygen demand removal efficiency than tetracycline (TC). In the SD system, NO₃⁻-N removal was 84.13%, whereas other systems achieved 97%, which was associated with a higher abundance of the n arG and nirS. Proteobacteria and Chloroflexi demonstrated strong adaptability to the antibiotics. TC inhibited the tricarboxylic acid cycle and organic matter degradation may be related to the reduced mdh. SD induced microorganisms to convert carbon sources into polyhydroxybutyrate instead of utilizing them directly, while SMZ optimized nitrogen metabolism by increasing the abundance of nirS and nirK, leading to higher NO₂⁻-N accumulation in these two EPD systems. SD stress reduced the abundance of ppk2/ppx gene, inhibited the energy production and internal carbon reserve of denitrifying polyphosphate-accumulating organisms in anaerobic stage. Although the microorganisms had stronger phosphorus uptake potential by up-regulating ppk1 gene, the lack of ATP necessary to drive this process eventually led to the reduction of PO₄³ ⁻-P removal ability. The abundance of resistance genes peaked in the SD system, significantly increasing the risk of antibiotic resistance. This study deciphers the metabolic mechanisms of the EPD system in response to three types of antibiotics and provides a scientific basis for its application in environments with fluctuating antibiotic stress.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142257"},"PeriodicalIF":11.3,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147847917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tetracycline and ciprofloxacin reduce nitrification and denitrification activity and alter microbial community composition and activity in microalgal-bacterial aerobic granular sludge.","authors":"Moein Besharati Fard, Navid Ahmadi, Yue Chen, Seow Wah How, Jo De Vrieze, Di Wu","doi":"10.1016/j.jhazmat.2026.142255","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142255","url":null,"abstract":"<p><p>Microalgal-bacterial aerobic granular sludge (MB-AGS) systems offer promising potential for wastewater treatment under chemical stress. However, their performance in the presence of antibiotics remains poorly understood. This study evaluated the response of MB-AGS to 1000 µg/L of tetracycline and ciprofloxacin in two separate bioreactors operated under alternating dark (60 min) and light (170 min) cycles at 20 °C. Chemical oxygen demand (COD) removal remained stable at 90 ± 4% (tetracycline) and 91 ± 6% (ciprofloxacin) over 80 days, suggesting that COD conversion was not impacted by antibiotic exposure. However, phosphate removal declined from ∼63% (antibiotic-free bioreactors) to 45 ± 6% (under tetracycline exposure) and 38 ± 8% (under ciprofloxacin exposure) after addition of antibiotics. Ciprofloxacin inhibited nitrification (declined to ∼50% NH₄⁺ removal), associated with reduced abundance of Nitrosomonas, while tetracycline impacted denitrification, evidenced by a lower Thauera abundance. Despite these impacts, the system removed 88.3 ± 5.6% of tetracycline and 69.5 ± 12.4% of ciprofloxacin, primarily through biosorption (for both antibiotics were more than 80%). Extracellular polymeric substances content increased by ∼19% under antibiotics exposure. Metagenomic analysis indicated changes in microbial community composition and function, while the overall antibiotic resistance gene profile remained relatively stable despite dynamic changes in individual resistance genes under antibiotic exposure. These findings demonstrate the strong potential of MB-AGS systems for effective organic carbon removal, while also highlighting opportunities to further enhance nutrient removal and mitigate antibiotic resistance genes under antibiotic stress.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142255"},"PeriodicalIF":11.3,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147848002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Region-specific patterns of soil bacterial communities' adaptation to hexachlorocyclohexane contamination.","authors":"Giacomo Barnabei, Devaki Destri, Marta Franco-Benito, Miguel Cebrian-Aldana, Akanksha Mishra, Sara Gil-Guerrero, Jose Carlos Castilla-Alcantara, Blanca Velasco-Arroyo, Rocio Barros-Garcia, Riccardo Di Mambro, Nicola Bertelloni, Simona Di Gregorio","doi":"10.1016/j.jhazmat.2026.142224","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142224","url":null,"abstract":"<p><p>Hexachlorocyclohexane (HCH) is a persistent organochlorine pollutant whose attenuation at former production sites relies on microbial degradation. The canonical lin pathway, predominantly associated with Sphingomonadaceae, is considered the main aerobic route for HCH transformation, yet its environmental distribution remains limited. We investigated soil bacterial communities and enrichment-derived bacterial consortia from three historically contaminated sites in Germany, Italy, and Spain using HCH depletion assays, 16S rDNA metabarcoding, and functional inference, based on a curated BIOSYSMOdb dataset developed by the BIOSYSMO project. Based on the ASL-level functional inference, the Spanish samples uniquely encoded a complete lin pathway restricted to Sphingobium sp., whereas German and Italian communities harboured respectively partial (LinB-C) or single-step (LinB) modules. Despite these differences, efficient depletion of all HCH isomers occurred across all enrichment cultures. Core-microbiome and differential-abundance analyses identified several non-Sphingomonadaceae taxa, including Stenotrophomonas, Pseudomonas, Achromobacter, Pseudolabrys, and Cupriavidus, which consistently increased during selective enrichment and likely contribute to HCH depletion. Overall, our findings suggest that effective HCH degradation is not restricted to the canonical lin pathway nor to Sphingomonadaceae but it might be mediated also by diverse soil bacteria via alternative lin-independent mechanisms. These results broaden the known ecological and functional landscape of HCH biodegradation and support the exploration of non-Sphingomonadaceae taxa for bioremediation of legacy lindane-contaminated sites.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142224"},"PeriodicalIF":11.3,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147848041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Health risks from PM_2.5-bound heavy metals from religious burning activities on the plateau.","authors":"Zhaoquan Yu, Lei Yang, Jiawei Yin, Haomiao Niu, Zhou Xu, Hao Qin, Liuyang Guo, Yan Liu, Lin Wu, Qijun Zhang, Jianfei Peng, Hongjun Mao","doi":"10.1016/j.jhazmat.2026.142261","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142261","url":null,"abstract":"<p><p>Long-term exposure to hypobaric hypoxia in high-altitude regions increases the cardiopulmonary burden on local populations and heightens their susceptibility to the health impacts of air pollution. Although religious burning activities, including Sang Sangsol (a traditional Tibetan religious activity) and temple incense burning, contribute a relatively small fraction of fine particulate matter (PM_2.5) emissions, they represent a distinctive and non-negligible local source on the Tibetan Plateau. However the associated health risks of this source remain poorly quantified. This study aims to characterize the chemical composition and spatial emission patterns of PM_2.5 from major religious burning activities on the Tibetan Plateau, and to quantify the associated health risks to plateau residents. Therefore PM_2.5 samples from religious burning activities were collected across seven prefecture-level cities in the Tibet Autonomous Region, and a health risk assessment model was applied to evaluate the inhalation-related health risks for populations potentially exposed to these emissions. The results revealed PM_2.5 from Sang Sangsol combustion is dominated by water-soluble ions(WSIs) (SO₄^2-, Cl^-, NO₃^-) and crustal elements (Mg, Si, Al), whereas temple incense burning is significantly enriched in organic carbon (OC), elemental carbon (EC), and tracer components (F⁻, Ca). Pollutant emissions exhibit strong spatial heterogeneity, with Lhasa showing the highest intensity of religious burning activities, where PM_2.5 and heavy metal emissions dominate the entire region. Health risks were higher than anticipated. The lifetime carcinogenic risk of Cr in all sampled cities surpassed the USEPA acceptable level (10^-6), and the non-carcinogenic risk index for the population in Lhasa was the highest. These findings demonstrate that although religious burning activities contribute relatively little to total PM_2.5 emissions on the Tibetan Plateau, they represent a distinctive local source with non-negligible health implications. Therefore, they should be more explicitly considered in regional air quality management and health protection strategies. Synopsis: This study establishes the first localized chemical fingerprint database for PM_2.5 from religious burning activities (Sang Sangsol and temple incense burning) on the Tibetan Plateau, revealing their distinct compositional signatures and demonstrating that despite their modest contribution to total PM_2.5 mass, they pose non-negligible carcinogenic and non-carcinogenic health risks-particularly from chromium (Cr)-that warrant inclusion in regional air quality management strategies.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142261"},"PeriodicalIF":11.3,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147848027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"All in one: Dual-mode probe for multivariate sensing heavy metal ions and cascade detecting biomarkers.","authors":"Wei Tang, Ying Song, Siqi Chen, Yuxuan Lv, Yanfei Li, Changhong Guo, Fang Chai","doi":"10.1016/j.jhazmat.2026.142247","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142247","url":null,"abstract":"<p><p>The toxicity of heavy metals not only poses a threat to environment, but also causes oxidative stress in human body by disruption of redox biomarkers. It is crucial for detecting heavy metals and their associated biomarkers efficiently, but is still a great challenge. Herein, aggregation-induced emission (AIE) featured dual-ligand gold nanoclusters (NG-AuNCs) were fabricated and further treated as dual-mode multivariate probe for heavy metals and biomarkers. The NG-AuNCs achieved simultaneous detection silver (Ag⁺) and mercury (Hg²⁺) via fluorometric mode based on AIE enhancement and fluorescence quenching, with detection limits of 0.87 nM and 47.0 nM, respectively. And the cascade colorimetric sensing of biomarkers hydrogen peroxide (H₂O₂) and glutathione (GSH) with limits of 2.9 μM and 0.22 μM was accomplished based on the peroxidase (POD)-mimicking properties of NG-AuNCs. This dual-mode sensing system connects environmental monitoring with biological assessment, addressing the \"exposure-effect\" chain from heavy metal pollution to oxidative stress. The impressive sensing performance was verified by the recovery in real water and human serum, demonstrating excellent environmental tolerance. This work provides a novel strategy for designing multivariate probe serving as environmental surveillance and health risk assessment.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142247"},"PeriodicalIF":11.3,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147847898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How long will perfluoroalkyl substances persist in sludge-amended soils?: Century-scale regional accumulation-decay modeling for North America, Europe, and Asia.","authors":"Minhee Kim, Seunghun Hyun, Junho Han","doi":"10.1016/j.jhazmat.2026.142251","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142251","url":null,"abstract":"<p><p>Perfluoroalkyl substances (PFAS) continue to be present in sludge and sludge-amended soil, despite decades of bans and phase-outs, yet their long-term persistence and regional disparities remain poorly understood. This study examined the occurrence of 14 PFAS in sewage sludge and market-balance production from 2000 to 2023 across North America, Europe, and Asia. Regional accumulation-decay models were developed to evaluate PFAS trends in sludge-amended soils and project long-term concentrations through 2300. Long-chain PFOS, PFOA, PFDA, and PFNA account for >80% of total PFAS in sludge, reflecting their high production and hydrophobicity. Repeated applications led to increased cumulative PFAS, reaching 20 ng g⁻¹ in Europe, 14 ng g⁻¹ in North America, and 1.6 ng g⁻¹ in Asia until 2023. Even if land-spreading ceased after 2023, only 60-70% of this burden would dissipate by 2300, leaving long-chain congeners dominant. PFOS is identified as a significant long-term risk, with North American soils predicted to exceed the GW/SW protection level (0.03 ng g⁻¹) until the year 4400, followed by Europe at 4297 CE and Asia at 3500 CE. PFDA, showing the longest persistence, remains above its 0.92 ng g⁻¹ criterion in European soils until 4100 CE, while PFNA exceeds its 0.042 ng g⁻¹ criterion until 3300 CE in Europe, followed by North America and Asia. The first compliance years are influenced by long-chain PFAS and the stringent of screening values. Findings emphasize natural attenuation alone is insufficient for risk reduction, especially for long-chain PFAS, underscoring the need for class-based regulation, better sludge treatment, and targeted remediation for contaminated farmland. CAPSULE ABSTRACT: Past and future concentrations of PFAS in sludge and sludge-amended soils are predicted for North America, Europe, and Asia.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142251"},"PeriodicalIF":11.3,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147848008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term anaerobic conversion of lindane by electrochemically generated hydrogen.","authors":"Guanxiong Wang, David Fernández-Verdejo, Ernest Marco-Urrea, Albert Guisasola, Paqui Blánquez","doi":"10.1016/j.jhazmat.2026.142242","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142242","url":null,"abstract":"<p><p>Lindane (γ‑HCH) persists in many aquifers where electron‑donor scarcity limits reductive dechlorination. Here we present a long‑term (116 d) microbial electrochemical technology (MET) that supplies cathodic H₂ to sustain lindane biotransformation. Sequentially decreasing the graphite‑brush cathode potential from -0.6 to -0.7 and -0.8 V versus SHE raised headspace H₂ from < 0.1% to > 1% (v/v) and accelerated lindane degradation rates. Product inhibition led by the accumulation of monochlorobenzene and benzene stalled the culture. The application of three 15‑min N₂ flushing cycles restored activity each time and boosted the removal rate from 33.3 ± 1.2 (µM/d) to 85.3 ± 4.5 (µM/d) at -0.8 V. The value of the poised cathodic potential also affected the product distribution ratio of monochlorobenzene to benzene. Thus, the MET did not just provide a source of electrons but also seems to have an impact on the transformation pathway of lindane. 16S‑rRNA profiling revealed a biocathode dominated by Shewanella (14.6 ± 5.8%) and Pseudomonas (35.0 ± 8.2%), two genera potentially involved either in the direct transformation of lindane or in establishing an interspecies electron transfer network that enhances its reduction.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"512 ","pages":"142242"},"PeriodicalIF":11.3,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147876922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MiR-155 knockout alleviates colitis exacerbated by EHDPHP exposure through inhibition of the JAK-STAT-p53 axis and apoptosis.","authors":"Clare Hsu, Xiu-Wen Li, Jia-Li Liu, Jia-Hao Zeng, Long Chen, Jian-Zheng Yang, Yi Liu, Jia-Hao Li, Ji-Hui Li, Li-Jian Chen, Xiao-Li Xie, Qi Wang","doi":"10.1016/j.jhazmat.2026.142228","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142228","url":null,"abstract":"<p><p>The increasing environmental concentration of the organophosphate ester 2-ethylhexyl diphenyl phosphate (EHDPHP) poses a threat to global health, particularly for individuals with preexisting conditions such as inflammatory bowel disease (IBD). This study investigated the impact of EHDPHP on a dextran sulfate sodium (DSS)-induced colitis mouse model. We found that EHDPHP exposure significantly aggravated disease severity and was associated with a marked upregulation of microRNA-155 (miR-155) in the colon. To elucidate the role of miR-155 in this process, we utilized miR-155 gene knockout (miR-155^-/-) mice. Our results demonstrate that miR-155 knockout protected against EHDPHP-exacerbated colitis by inhibiting apoptosis and suppressing the proinflammatory JAK-STAT-p53 signaling axis, and this process is closely linked to shifts in gut microbiota abundance. Conversely, miR-155 overexpression reverses these protective effects. These findings establish miR-155 as a critical mediator in the aggravation of colitis by environmental pollutants and suggest that targeting miR-155 may represent a potential therapeutic target for pollutant-aggravated inflammatory bowel disease.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142228"},"PeriodicalIF":11.3,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147847951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decoding tetrachlorantraniliprole fate in agricultural soils: Mechanistic insight into major imide-type metabolites and their enhanced aquatic risk.","authors":"Leyuan Ji, Yingge Wang, Xiaopeng Li, Feng Chen, Chi Wu, Zhou Lu, Yanli Man, Liangang Mao, Lizhen Zhu, Lan Zhang, Xingang Liu","doi":"10.1016/j.jhazmat.2026.142214","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142214","url":null,"abstract":"<p><p>Tetrachlorantraniliprole (TET), a potent diamide insecticide, has raised environmental concerns due to its persistence and the largely uncharacterized hazards of its transformation products (TPs). We combined laboratory incubations, field dissipation trials and an integrated HRMS-DFT-QSAR framework to investigate TET degradation, transformation pathways and aquatic hazard in agricultural soils. Aerobic/anaerobic incubations in four Chinese soils and field studies at three regions showed single-phase TET dissipation (DT₅₀ 78-597 d in the laboratory; 17.5-34.4 d in the field), strongly soil-controlled: slower in acidic, organic-rich red/black soils, faster in alkaline Fluvo-aquic and loess soils. Using Non-Target Screening (NTS) via HPLC-HRMS, ten TPs were identified, seven of which are reported for the first time. Four predominant TPs (TP517, TP503, TP499a, and TP499b) were structurally confirmed using synthesized standards. The structural evolution of TET involved N-demethylation, cyclized imide formation, dehalogenation/hydroxylation, and amide-cleavage. Notably, TP517 was the most abundant observed metabolite, reaching 15.2-62.2% of the measured initial parent concentration in laboratory soils (mean values, n = 3), the optimized sample-preparation procedure substantially increased the recoverable extractable fraction and enabled robust closure of the total mass balance (parent + ΣTPs,82.6-122.2%). QSAR-based ecotoxicological modeling (ECOSAR) predicted that several TPs, particularly TP503 and TP517, exhibit higher acute and chronic aquatic toxicity than the parent TET. These findings demonstrate that TET transforms into more persistent and hazardous products in soil environments, and provide a mechanistically informed basis for TP-inclusive monitoring and risk management of halogenated diamide insecticides in agricultural soils.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142214"},"PeriodicalIF":11.3,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147847914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multi-view machine learning approach for estimating PM_2.5 concentrations from smartphone photographs.","authors":"Jianzheng Liu, Zurong Zheng, Fei Yao, Weifeng Li","doi":"10.1016/j.jhazmat.2026.142172","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.142172","url":null,"abstract":"<p><p>Accurate and efficient estimates of fine particulate matter (PM_2.5) concentrations and associated exposure from smartphone photographs can provide the public with personalized risk information, helping to raise environmental risk awareness and reduce health risks. Existing studies are limited to estimating PM_2.5 concentrations from single-view smartphone photographs, where the spatiotemporal mismatch between photo capture and PM_2.5 measurements during data collection often introduces systematic bias that could otherwise be avoided. To address this, we construct a rigorously spatiotemporally registered benchmark dataset of PM_2.5 measurements and multi-view smartphone photographs for two Chinese provinces (Hebei and Fujian) between 2022 and 2024. For each province, we use the XGBoost model to relate PM_2.5 measurements to image features that we extract from multiple semantic segmentation regions within the multi-view smartphone photographs. The proposed method achieves R² values of 0.96 and 0.89, and RMSE values of 6.82 and 3.63 μg/m³ on the independent test sets for the Hebei and Fujian provinces, respectively, which consistently outperforms alternative methods that rely on single-view smartphone photographs or overall image features. Key predictive features include image color extracted from vegetation regions, as well as color and local binary pattern extracted from sky regions. Overall, our work advances image-based air quality monitoring by providing a multi-view machine learning approach and the first rigorously spatiotemporally registered dataset of PM_2.5 measurements and smartphone photographs, which enables more reliable PM_2.5 estimates and highlights the role of semantic image features in predictive performance.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"511 ","pages":"142172"},"PeriodicalIF":11.3,"publicationDate":"2026-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147847923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}