Chemosphere最新文献

{"title":"Date-seed-derived biochar-modified screen-printed electrode for electrochemical determination of Hg(II) in water","authors":"Selvakumar Palanisamy,&nbsp;Ali Abubaker Albraiki,&nbsp;Xiaoning Fu,&nbsp;Shadi W. Hasan,&nbsp;Nouha Alcheikh","doi":"10.1016/j.chemosphere.2026.145128","DOIUrl":"10.1016/j.chemosphere.2026.145128","url":null,"abstract":"<div><div>Mercury (Hg) contamination remains a serious environmental problem because Hg can persist in water and accumulate in living organisms. In this study, we investigated the use of date-seed-derived biochar (DSC-N) as a sustainable modifier for screen-printed carbon electrodes for Hg(II) detection. Date seeds collected in the United Arab Emirates were converted into biochar by a simple one-step carbonization process, without chemical activation or external nitrogen precursors. Biochars prepared at different temperatures were characterized by scanning and transmission electron microscopy, nitrogen adsorption-desorption analysis, X-ray diffraction, Raman spectroscopy, and Fourier-transform infrared spectroscopy. X-ray photoelectron spectroscopy was used to examine the surface chemistry of the DSC-N. Among the tested materials, DSC-N 800 showed the most suitable combination of porosity, carbon structure, defects, and retained oxygen and nitrogen-containing surface groups. The DSC-N800-modified electrode showed the highest Hg(II) stripping signal among the tested DSC-N modified electrodes. The DSC-N 800-modified electrode was then used to determine Hg(II) by differential-pulse anodic stripping voltammetry. Under optimized conditions, the sensor showed a linear response from 0.05 to 40.55 μM, a sensitivity of 0.3576 μA μM⁻¹, and a detection limit of 21.1 nM. The fabricated sensor electrode showed good repeatability, reproducibility, selectivity, and satisfactory performance in real-water samples containing Hg(II). This study demonstrates a low-chemical-input approach for converting date-seed waste into a functional biochar electrode modifier for monitoring Hg(II) in water.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145128"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149307855","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":"Development of a fast and sensitive spectrophotometric method for Cu2+ quantification - application in Cu2+ concentration monitoring during adsorption onto a geopolymer material","authors":"Gaëlle Ngnie,&nbsp;Lionel Magellan Sambang,&nbsp;Rufin Théophile Tene Fongang,&nbsp;Marie Rosine Kenmoe Mekui,&nbsp;Eunice Merveille Tatang Djimene,&nbsp;Herve Kouamo Tchakoute,&nbsp;Gustave Kenne Dedzo,&nbsp;Emmanuel Ngameni","doi":"10.1016/j.chemosphere.2026.145140","DOIUrl":"10.1016/j.chemosphere.2026.145140","url":null,"abstract":"<div><div>The use of copper in many technologies inevitably leads to environmental issues due to pollution by Cu²⁺, whose harmfulness to living organisms at high concentrations is well documented. Detection methods as well as strategies for Cu²⁺ removal in aqueous media are important to reduce its environmental impact. A spectroscopic method based on the cupric reducing antioxidant capacity (CUPRAC) assay is proposed for Cu²⁺ quantification in aqueous media. This method involved Cu²⁺ complexation with neocuproine followed by its reduction to the orange Cu(I) complex by ascorbic acid. Under optimal conditions (5 mM of both neocuproine and ascorbic acid), a detection limit of 0.46 μM (29.2 μg L⁻¹) was obtained in the concentration range 0.5 μM to 300 μM. The method was poorly affected by the presence of other metallic cations and enabled the quantification of Cu²⁺ in tap water and well water with a recovery of 97.3%. The developed analytical technique was also applied for Cu²⁺ concentration monitoring during its removal from aqueous solution by adsorption onto a geopolymer sawdust composite material. This material, characterized by a dispersion of lignocellulosic particles within the geopolymer matrix, displayed fast Cu²⁺ adsorption kinetics, enhanced by the presence of sawdust. A maximum adsorption capacity of 57.28 mg g⁻¹ was achieved under optimized experimental conditions. Appreciable performance was obtained in real media containing other metallic cations such as tap, river and well water. Even the adsorbed Cu²⁺ was readily desorbed in acidic media, a substantial loss of GSC performances was observed, due to the strong interaction between protons and the geopolymer matrix.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145140"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149336433","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":"Rapid methylene blue removal by MoS2 nanoflowers: Role of electronic disorder and surface charge","authors":"Piyush Siroha,&nbsp;Vartika Khandelwal,&nbsp;Neeraj Panwar,&nbsp;Soumyaranjan Barik,&nbsp;Jaswant K. Yadav,&nbsp;Shweta Khanna,&nbsp;Surendra Kumar,&nbsp;Jitendra Gangwar,&nbsp;Ramovatar","doi":"10.1016/j.chemosphere.2026.145139","DOIUrl":"10.1016/j.chemosphere.2026.145139","url":null,"abstract":"<div><div>MoS₂ nanoflowers were synthesized <em>via</em> a temperature-controlled hydrothermal route (200 - 240 °C) to investigate the coupling among structural ordering, electronic disorder, and adsorption performance toward methylene blue (MB). The MS-240 sample exhibited the highest removal percentage 96.92% with an adsorption capacity of ∼12.92 mg g⁻¹ within 20 min under low-concentration conditions (10 ppm) among the investigated samples. Structural and textural analyses revealed enhanced crystallinity, reduced interlayer spacing, and a mesoporous architecture (∼36.35 m² g⁻¹). These properties enable effective mass transport during adsorption. Optical studies demonstrate an increase in band gap (2.19 - 2.29 eV) and a decrease in Urbach energy (0.74 - 0.58 eV), indicating reduced electronic disorder. An inverse trend between Urbach energy and adsorption performance was observed within the investigated synthesis-temperature range. This indicates that reduced electronic disorder is one of several characteristics that co-evolve with synthesis temperature, and the Urbach energy serves as a complementary electronic descriptor for understanding adsorption behaviour rather than an independent causal parameter. Zeta potential measurements confirmed enhanced negative surface charge, strengthening electrostatic interactions with MB. Adsorption followed pseudo-second-order kinetics and the Freundlich isotherm, indicating heterogeneous surface-controlled adsorption. Thermodynamic parameters are consistent with a spontaneous, endothermic and predominantly physical adsorption process. These findings demonstrate that Urbach energy can serve as a complementary electronic descriptor for understanding adsorption behaviour and provide useful guidance for the design of MoS₂-based adsorbents.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145139"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149307858","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":"Synergizing visible-light photocatalytic degradation of ciprofloxacin and ex-situ hydrovoltaic self-monitoring via interfacial dipole engineering in a ZnPP-nanoconfined TiO2 architecture","authors":"Mohamed Rashad,&nbsp;Abdullah Alhendal","doi":"10.1016/j.chemosphere.2026.145141","DOIUrl":"10.1016/j.chemosphere.2026.145141","url":null,"abstract":"<div><div>Dye-sensitized photocatalysis and electrokinetic streaming sensing are traditionally optimized as separate problems, yet both depend on the same solid–liquid interfacial charge distribution. Here, we show that a single carboxylate anchor (Ti-O-C) can govern both processes. Nanoconfinement of zinc protoporphyrin (ZnPP) inside mesoporous TiO₂ channels induces a ground-state electron redistribution at the interface, evidenced by a +0.84 eV shift in the Ti 2p XPS binding energy. This interfacial dipole drives Type-I electron injection for visible-light photocatalysis, achieving 92% ciprofloxacin degradation (k = 0.021 min⁻¹) with superoxide radicals (•O₂⁻) as the dominant reactive oxygen species. The identical carboxylate-rich surface architecture simultaneously establishes a tailored electric double layer that generates a transient open-circuit potential (−0.17 ± 0.03 V) upon water droplet contact. We further demonstrate that this electrokinetic signal attenuates linearly with ciprofloxacin concentration, enabling trace-level detection down to 0.002 mg L⁻¹. By correlating the photocatalytic destruction of the antibiotic with the recovery of the hydrovoltaic response, the same interfacial chemistry is used for both degradation and self-reporting, offering a design strategy for integrated environmental remediation platforms.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145141"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149352672","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":"Safety assessment of fluorosilicic acid used for water fluoridation: evidence from in vitro and Caenorhabditis elegans models","authors":"Amanda Souza Scotti,&nbsp;Ivana Grivicich,&nbsp;Jayne Torres de Sousa,&nbsp;Yuri Carpes Machado,&nbsp;Rosane Gomez,&nbsp;Ana Letícia Hilario Garcia,&nbsp;Juliana da Silva,&nbsp;Jaqueline Nascimento Picada","doi":"10.1016/j.chemosphere.2026.145137","DOIUrl":"10.1016/j.chemosphere.2026.145137","url":null,"abstract":"<div><div>Fluoride is widely used in drinking water as a public health strategy to prevent dental caries. However, the continued use of fluoride-containing compounds, such as fluorosilicic acid (FA), may pose cytotoxic and genotoxic risks, particularly under conditions of prolonged exposure. This study aimed to investigate the cytotoxic, genotoxic, and mutagenic effects of FA and to assess its toxicity in the nematode <em>Caenorhabditis elegans</em>, using concentrations encompassing those encountered in environmental exposure. Cytotoxicity, genotoxicity, and chromosomal mutagenicity were investigated in V79 fibroblast cells, using the MTT and clonogenic assays, comet assay and cytokinesis-block micronucleus cytome (CBMN-Cyt) assay while gene mutagenicity was evaluated using the Ames test. The results showed that although FA did not reduce cell viability after acute exposure, it significantly impaired proliferative capacity. DNA damage increased and the CBMN-Cyt assay revealed elevated frequencies of micronuclei, nuclear buds, and nucleoplasmic bridges, accompanied by increased apoptosis. In contrast, FA did not induce gene mutations in the Ames test. In <em>C. elegans</em>, FA exposure significantly reduced survival at the highest concentrations tested, impaired body development, and induced sublethal toxicity, as evidenced by decreased pharyngeal pumping and body bending following exposure from the egg stage to adulthood. Taken together, these findings indicate that FA can impair cell proliferation and induce chromosomal damage in mammalian cells, while also causing toxicity in <em>C. elegans</em> at concentrations encountered in environmental exposure. These results highlight the need for further studies to clarify the long-term effects of FA exposure and assess their relevance to current fluoridation practices.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145137"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149307856","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":"Air pollution and polycystic ovary metabolic syndrome (PMOS) in a heavily industrialized Middle Eastern city: A cross-sectional study","authors":"Behrooz Karimi,&nbsp;Maryam Kord,&nbsp;Maryam Shokarpour,&nbsp;Seyed Hamed Mirhoseini","doi":"10.1016/j.chemosphere.2026.145136","DOIUrl":"10.1016/j.chemosphere.2026.145136","url":null,"abstract":"<div><div>Globally, polycystic ovary metabolic syndrome (PMOS) affects 5% to 20% of women of childbearing age. Despite the high burden of ambient air pollution in the Middle East, epidemiological evidence linking long-term exposure to PMOS remains limited. This cross-sectional study examined associations between long-term residential exposure to criteria air pollutants and PMOS prevalence in Arak, Iran.</div><div>We enrolled 301 women (153 PMOS cases, 148 non-PMOS controls) from gynecology clinics (April 2024–March 2025). Long-term (365-day) residential exposures were estimated using inverse distance weighting (IDW) interpolation from three fixed monitoring stations. Modified Poisson regression was prioritized to estimate prevalence ratios (PRs), given the high prevalence of the outcome. Robustness was assessed via alternative exposure windows (90-day, 30-day), extreme value exclusion, and propensity score matching.</div><div>Women with PMOS had significantly higher exposures to PM₂.₅ (mean difference: 3.00 μg/m³), PM₁₀ (7.50 μg/m³), NO₂ (2.96 ppb), and SO₂ (11.35 ppb) (all p ≤ 0.025). Per 1-SD increase, adjusted PRs were: PM₂.₅ = 1.22 (95% CI: 1.09–1.35; p = 0.001); PM₁₀ = 1.23 (95% CI: 1.09–1.36; p = 0.001); NO₂ = 1.21 (95% CI: 1.07–1.33; p = 0.003); and SO₂ = 1.15 (95% CI: 1.01–1.28; p = 0.032). All sensitivity analyses supported the robustness of these associations. Exploratory analyses suggested specificity to menstrual/ovulatory dysfunction.</div><div>This first Middle Eastern study reports statistical associations between long-term PM₂.₅, PM₁₀, NO₂, and SO₂ exposure and PMOS prevalence in a high-pollution industrial setting. Because of the cross-sectional design, these findings cannot establish causality and are strictly hypothesis-generating, highlighting the urgent need for prospective cohort studies.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145136"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149307857","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":"Falco peregrinus as a sentinel species of environmental contamination: a multi-matrix assessment of trace element accumulation in feathers and faeces between two sites in Italy","authors":"Fabio Castagna,&nbsp;Stefano Ruga,&nbsp;Roberto Bava,&nbsp;Flavia Conte,&nbsp;Marco Trifuoggi,&nbsp;Angelo Pagano,&nbsp;Orlando Paciello,&nbsp;Ernesto Palma,&nbsp;Domenico Britti,&nbsp;Antonio Giordano,&nbsp;Luigi Montano,&nbsp;Giovanna Liguori","doi":"10.1016/j.chemosphere.2026.145138","DOIUrl":"10.1016/j.chemosphere.2026.145138","url":null,"abstract":"<div><div>This study investigates trace element accumulation in the peregrine falcon (<em>Falco peregrinus</em>) at two contrasting sites in Italy, using a non-invasive multi-matrix approach based on feathers and faeces, integrated with environmental data from soil and well water. Individuals from Manfredonia and Orvieto were compared to assess both exposure during feather growth and recent dietary exposure. Soil analyses confirmed marked differences in geochemical contamination between the two sites, while well water showed more heterogeneous patterns. Trace element concentrations in feathers showed a consistent spatial pattern, with significantly higher levels in Manfredonia individuals for most elements, including mercury and lead. These differences may reflect enhanced dietary exposure and a potential trophic transfer, although prey items were not analyzed and facility-specific exposure factors cannot be excluded. In particular, mercury concentrations in feathers were markedly elevated in Manfredonia falcons, highlighting the potential value of feathers as indicators of exposure integrated during feather growth. Consistently, faecal analyses provided complementary information on recent exposure, with higher concentrations of several elements in Manfredonia individuals. The lack of significant differences for some elements may be hypothesized to reflect rapid excretion dynamics or physiological regulation, although these mechanisms were not experimentally investigated in the present study. The combined use of feathers and faeces provided complementary information that may be consistent with exposure during feather growth and recent dietary intake, although these exposure windows were not independently validated. The multi-matrix comparison revealed that feathers and soil exhibited the most consistent site-related differences, while faeces and water showed greater variability, reflecting distinct contamination and exposure dynamics. Overall, the results indicate that trace element exposure in raptors is associated with site-specific environmental conditions and suggest the potential use of peregrine falcons as bioindicators of terrestrial ecosystem contamination. This exploratory study provides a baseline for future investigations and highlights the value of non-invasive multi-matrix approaches for monitoring trace element exposure in terrestrial raptors.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145138"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149328566","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":"In vitro chromosome damage induced by quaternary mixtures of polycyclic aromatic hydrocarbon derivatives using Doehlert experimental design","authors":"Bosc Olivia,&nbsp;Tassistro Virginie,&nbsp;Fortugno Clémence,&nbsp;Doumenq Pierre,&nbsp;Claeys-Bruno Magalie,&nbsp;Orsière Thierry","doi":"10.1016/j.chemosphere.2026.145112","DOIUrl":"10.1016/j.chemosphere.2026.145112","url":null,"abstract":"<div><div>Humans are continuously exposed to complex mixtures of environmental contaminants. This kind of multiple exposure occurs when reclaimed asphalt pavements are recycled, since the fumes contain polycyclic aromatic hydrocarbon derivatives (PAHs+) that are primarily been investigated as single compounds. In this study, we assessed the genotoxic potential of an environmentally relevant quaternary mixture composed of 1-nitropyrene, quinoline, 2-naphthol, and 6H-benzo[c,d]pyrene-6-one (6H-BPO) using the human bronchial epithelial BEAS-2B cell line. Cells were exposed according to a Doehlert experimental design and chromosomal damage was evaluated using the cytokinesis-block micronucleus assay. Response surface methodology was applied to model both cytostasis and micronucleus induction and their values were calculated in the whole domain. All quaternary exposure conditions produced acceptable cytostasis (&lt;55%), enabling reliable genotoxicity assessment. The models revealed that 1-nitropyrene was the main driver of cytostatic effects, while oxygenated PAHs, 2-naphthol and 6H-BPO, mainly contributed to chromosomal damage. Moreover, significant response surfaces showed concentration-related interactions, demonstrating that genotoxic responses could not be explained by additive effects. By combining <em>in vitro</em> genotoxicity testing with innovative experimental design, this study provides a robust framework for investigating complex contaminant mixtures while significantly reducing the number of required experimental conditions. These findings also improve the mechanistic understanding of PAHs + mixture toxicity and support the integration of mixture-based approaches into environmental hazard assessment and human health risk evaluation.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"414 ","pages":"Article 145112"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149278589","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":"Environmental levels of PBDEs in Brazilian industrial cities: Sources, seasonal variability, and human exposure implications","authors":"Olumide Emmanuel Akinrinade,&nbsp;Emanuel Apolinario Costa de Oliveira Jr.,&nbsp;Hansel David Burgos Melo,&nbsp;Andre Henrique Rosa","doi":"10.1016/j.chemosphere.2026.145122","DOIUrl":"10.1016/j.chemosphere.2026.145122","url":null,"abstract":"<div><div>Polybrominated diphenyl ethers (PBDEs) are prioritised chemicals regulated under the Stockholm Convention on Persistent Organic Pollutants. PBDE data are, however, developing for outdoor air, soil, surface water and sediment in Brazil. This study therefore targeted eight commonly reported PBDE congeners in air (using passive air sampler-polyurethane foam) and soil in Sorocaba (a major industrial city) as well as adjacent cities (Votorantim and Itu) in Brazil. Additional surface water and sediment samples were collected from Itupararanga reservoir, a major dam for domestic water supply. All samples were collected at approximately two-month intervals for a total period of one year. The average air, soil and sediment concentrations were observed at 310 pg/m³, 14 ng/g, dw, and 2.5 ng/g, dw, respectively. The air concentrations compare well with the top range of other global data while soil/sediment is consistent with the low range of the global data. No PBDE congener was detected in the surface water samples. The estimated soil inventory of the ∑₈PBDEs and PBDE-209 in the soil were evaluated at 1.3 ± 0.17 and 1.2 ± 0.15 metric tons, respectively. The temporal air concentration pattern was consistent with a possible influence of wet scavenging, although the association was not statistically significant when all six sampling periods were considered. The potential impact of the wet scavenging was not observed in the soil concentrations. Human exposure risk was generally low for both soil (dermal plus accidental ingestion) and air (dermal plus inhalation ingestion) samples, with risk from air dominating that of soil under normal exposure. Relevant recommendations are provided for future scientific work regarding changes and potential factors influencing PBDE congener patterns.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"414 ","pages":"Article 145122"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149290682","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":"Fe/Mo dual-site MIL-100/MoS2/Fe3O4: a magnetically recyclable photo-fenton-like catalyst for PMS activation towards tetracycline degradation and toxicity reduction","authors":"Jun Zhang,&nbsp;Wang Ye,&nbsp;Xiang Li,&nbsp;Haoyue Xu,&nbsp;Xingru Liu,&nbsp;Yingxi Wang,&nbsp;Ling Li","doi":"10.1016/j.chemosphere.2026.145127","DOIUrl":"10.1016/j.chemosphere.2026.145127","url":null,"abstract":"<div><div>In the present work, a novel magnetic ternary composite, MIL-100/MoS₂/Fe₃O₄, was rationally designed and fabricated via a stepwise solvothermal method for the robust activation of peroxymonosulfate (PMS) toward tetracycline (TC) degradation. A combination of XRD, FT-IR, XPS, and FE-SEM provided comprehensive structural and morphological characterization of the composite. Electrochemical impedance spectroscopy (EIS) further suggested a reduced charge transfer resistance, potentially contributing to improved interfacial charge transfer. Compared to its individual components and binary counterparts, the composite demonstrated markedly superior catalytic activity, achieving 82.5% TC degradation within 5 min. Key operational parameters were systematically investigated. Radical quenching and EPR analyses revealed a synergistic radical/non-radical pathway, with singlet oxygen (¹O₂) playing a dominant role. Degradation intermediates were identified by LC-MS, enabling the proposal of transformation pathways, and an ECOSAR assessment indicated a reduction in ecological risk. Furthermore, the integrated Fe₃O₄ component enabled facile magnetic separation, with the catalyst retaining 77% activity after six cycles. The outstanding performance is attributed to the well-engineered heterostructure, which promotes efficient interfacial electron transfer and accelerates the Fe³⁺/Fe²⁺ redox cycle. This study provides a high-performance, magnetically recoverable catalyst and offers fundamental insights into the structure-activity relationship in MOF-based heterostructures for advanced oxidation processes.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"415 ","pages":"Article 145127"},"PeriodicalIF":8.1,"publicationDate":"2026-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149328567","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}