Journal of hazardous materials最新文献

Long-range electron transfer pathways at FeCu bimetallic interfaces: Bridging catalytic mechanisms and scalable applications for persistent pollutant degradation. FeCu双金属界面上的远程电子转移途径：桥接催化机制和可扩展的污染物降解应用。

Journal of hazardous materials Pub Date : 2025-05-22 DOI: 10.1016/j.jhazmat.2025.138682

Xiaoyin You, Chaohai Wang, Chuqiao Wang, Xing Xu, Yuying Hu, Ning Li, Fengping Hu, Wen Liu, Xiaoming Peng

{"title":"Long-range electron transfer pathways at FeCu bimetallic interfaces: Bridging catalytic mechanisms and scalable applications for persistent pollutant degradation.","authors":"Xiaoyin You, Chaohai Wang, Chuqiao Wang, Xing Xu, Yuying Hu, Ning Li, Fengping Hu, Wen Liu, Xiaoming Peng","doi":"10.1016/j.jhazmat.2025.138682","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138682","url":null,"abstract":"Efficient and stable heterogeneous catalysts for peroxymonosulfate (PMS) activation are pivotal for advancing advanced oxidation processes in water treatment. However, the limited redox cycling capacity of single-metal sites often hinders their catalytic performance and durability. Here, dispersed Fe-Cu bimetallic clusters anchored on a nitrogen-sulfur codoped carbon matrix ((FeCu-SNC) were synthesized via a coordination-pyrolysis strategy. FeCu-SNC was engineered to activate peroxymonosulfate (PMS) for the degradation of bisphenol A (BPA) and structurally diverse pollutants. Combined experimental and density functional theory (DFT) analyses revealed that the Fe-Cu dual sites synergistically enhanced PMS adsorption and triggered a dominant electron transfer pathway (ETP), bypassing conventional radical-mediated mechanisms. The FeCu-SNC/PMS system achieved rapid BPA degradation (kobs > 0.38 min-1), with preferential oxidation of pollutants bearing electron-donating groups. A dynamic catalytic membrane system (DCMS) integrated with electrospinning technology enabled catalyst reuse, maintaining > 95 % BPA removal over 300 min of continuous operation. Furthermore, a scalable ETP device utilizing a salt bridge and ammeter effectively isolated sulfate ion leaching, attaining 96 % pollutant removal after 72 h while addressing secondary pollution. This work provides a dual strategy- catalyst design and process engineering-for sustainable water decontamination.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"494 ","pages":"138682"},"PeriodicalIF":0.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133333","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}

引用次数: 0

Synergistic effects of sulfur-doped carbon dots/permanganate process for DCF degradation: Mechanism and pathways. 硫掺杂碳点/高锰酸盐工艺对DCF降解的协同效应：机理与途径。

Journal of hazardous materials Pub Date : 2025-05-17 DOI: 10.1016/j.jhazmat.2025.138567

Danmei Luo, Heng Zhang, Xingxing An, Jia Zhao, Can Feng, Jialong Yin, Mengfan Luo, Tao Wei, Yang Liu, Yanbiao Shi, Jing Zhang, Bo Lai

{"title":"Synergistic effects of sulfur-doped carbon dots/permanganate process for DCF degradation: Mechanism and pathways.","authors":"Danmei Luo, Heng Zhang, Xingxing An, Jia Zhao, Can Feng, Jialong Yin, Mengfan Luo, Tao Wei, Yang Liu, Yanbiao Shi, Jing Zhang, Bo Lai","doi":"10.1016/j.jhazmat.2025.138567","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138567","url":null,"abstract":"Extensive research has explored strategies to enhance permanganate (PM) oxidation capacity, with carbon materials having shown significant promise in treating refractory organic pollutants in water. However, the impacts of carbon quantum dots (CQDs) and heteroatom-doped CQDs on PM oxidation remain unclear, warranting further investigation. In this study, we found that sulfur-doped CQDs (SCQDs) significantly outperformed CQDs, nitrogen-doped CQDs (NCQDs), and boron-doped CQDs (BCQDs) in promoting the oxidation reaction of diclofenac sodium (DCF) by PM. Through quenching experiments, light-shielding tests, and UV-Vis spectroscopy, we revealed that the PM/SCQDs system could rapidly and stably generate Mn(III) and MnO2, thereby facilitating the removal of DCF. Characterization analysis showed that SCQDs possess a surface enriched with diverse functional groups, and sulfur doping further enhances their electron cloud density. This structural characteristic enhances the ability of SCQDs to donate electrons to permanganate, thereby promoting its reduction to Mn(III) and MnO2. A comprehensive evaluation of key operational parameters governing the PM/SCQDs system performance was conducted. Additionally, the PM/SCQDs system exhibited substantial resistance to interference from common matrix ions and natural organic matter in water. The study provides a new perspective on enhancing permanganate oxidation by SCQDs and offers a promising pathway for efficient water pollutant degradation.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"494 ","pages":"138567"},"PeriodicalIF":0.0,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144096332","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}

引用次数: 0

Efficient and stable copper tungstate catalyst for water treatment with peroxymonosulfate: Effect of synthetic pH, primary oxidant, and practical feasibility. 高效稳定的钨酸铜过氧单硫酸盐水处理催化剂：合成pH、主氧化剂的影响及实际可行性。

Journal of hazardous materials Pub Date : 2025-05-05 Epub Date: 2025-02-08 DOI: 10.1016/j.jhazmat.2025.137482

Khen Duy Tran, Yong-Yoon Ahn, Bomi Kim, Kitae Kim, Jonghun Lim, Jungwon Kim

{"title":"Efficient and stable copper tungstate catalyst for water treatment with peroxymonosulfate: Effect of synthetic pH, primary oxidant, and practical feasibility.","authors":"Khen Duy Tran, Yong-Yoon Ahn, Bomi Kim, Kitae Kim, Jonghun Lim, Jungwon Kim","doi":"10.1016/j.jhazmat.2025.137482","DOIUrl":"10.1016/j.jhazmat.2025.137482","url":null,"abstract":"In this study, copper tungstate (CuWO4) nanoparticles, which are highly efficient and stable catalysts for water treatment, were synthesized via a hydrothermal method under various pH conditions. CuWO4 synthesized at pH 10 (CuWO4@10) exhibited the highest degradation efficiency and the lowest metal ion leaching. In the presence of CuWO4@10 (0.5 g/L) and peroxymonosulfate (PMS, 1 mM), 4-chlorophenol (4-CP, 100 μM) was completely degraded within 5 min, and the total metal ion leaching concentration after 4 h was only 10.2 μM. The catalytic activity of CuWO4 for 4-CP degradation was 4.7-99.0 times greater than that of CuO catalysts. This enhanced performance is attributed to the presence of W, which increases the surface area and reduces charge transfer resistance. Based on the results of radical-quenching experiments, solvent exchange experiments, PMS decomposition measurements, electron paramagnetic resonance spectroscopy, and Raman spectroscopy, high-valent copper (Cu(III)) was identified as the primary oxidant responsible for degradation in the CuWO4/PMS system. The CuWO4/PMS system rapidly degraded various phenolic compounds, and its degradation efficiency remained consistent across repeated uses of the CuWO4 catalyst. Degradation in groundwater also occurred efficiently in the CuWO4/PMS system. This study provides valuable insights into the development of practical PMS-based water treatment processes.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"488 ","pages":"137482"},"PeriodicalIF":0.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143384518","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}

引用次数: 0

Photodegradation process and mechanism of 2,3,6-trichloronaphthalene on kaolinite surfaces under ultraviolet-A irradiation: Role of fulvic acid and density functional theory calculations. 紫外- a照射下2,3,6-三氯萘在高岭石表面的光降解过程及机理：黄腐酸的作用及密度泛函理论计算

Journal of hazardous materials Pub Date : 2025-05-05 Epub Date: 2025-02-07 DOI: 10.1016/j.jhazmat.2025.137481

YingTan Yu, WenBo Si, Shumeng Zhao, ShiMeng Wang, MengDi Liu, Bing Fan, Shuang Xue, Jian Wang, Jing Xu

{"title":"Photodegradation process and mechanism of 2,3,6-trichloronaphthalene on kaolinite surfaces under ultraviolet-A irradiation: Role of fulvic acid and density functional theory calculations.","authors":"YingTan Yu, WenBo Si, Shumeng Zhao, ShiMeng Wang, MengDi Liu, Bing Fan, Shuang Xue, Jian Wang, Jing Xu","doi":"10.1016/j.jhazmat.2025.137481","DOIUrl":"10.1016/j.jhazmat.2025.137481","url":null,"abstract":"Polychlorinated naphthalenes (PCNs), a class of persistent organic pollutants (POPs), pose significant environmental and health risks, with trichloronaphthalene being a predominant congener in atmospheric particulate matter. This study investigates the photodegradation of 2,3,6-trichloronaphthalene (CN-26) on kaolinite surfaces under ultraviolet-A (UV-A) irradiation, focusing on the impact of fulvic acid (FA), temperature, humidity, and pH. The photodegradation mechanism of CN-26 was inferred via radical quenching experiments and density functional theory (DFT) calculations. The optimized degradation rate of CN-26 was 75.57 % at 25 °C, 70 % humidity, and pH 7 when FA was added at a concentration of 30 mg kg-1. Based on the radical quenching experiments, •OH are the primary active species involved in the degradation of CN-26, followed by electrons. In the absence of FA, •OH contributed 82.21 %, while electronic was 17.79 %. Conversely, in the presence of FA, the contribution rates of •OH, and electronic are 68.32 % and 21.21 % respectively. DFT calculations indicated that the 6 C site of CN-26 exhibited the highest susceptibility to radical attack, with the highest FED2HOMO+FED2LUMO value (0.25273), corroborated by averaged local ionization energy (ALIE) analysis. In the analysis of the reaction of •OH with CN-26, the lowest transition state ΔrG value of 1.09 kcal mol-1 was observed for compound 6 C, indicating that this site is the most susceptible to •OH attack. The degradation products of CN-26 were detected using gas chromatography-mass spectrometry (GC-MS), and the possible photodegradation pathways were proposed, which included dechlorination, hydroxylation, and aromatic ring opening. This study would provide insights into the photochemical behaviors of PCNs.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"488 ","pages":"137481"},"PeriodicalIF":0.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375066","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}

引用次数: 0

Regulating the electronic structure of iron sites in single-atom catalyst with interfacial chemical bond to enhance Fenton-like reaction. 用界面化学键调节单原子催化剂中铁位的电子结构，促进类芬顿反应。

Journal of hazardous materials Pub Date : 2025-05-05 Epub Date: 2025-02-07 DOI: 10.1016/j.jhazmat.2025.137483

Hongyu Shi, Hang Zhang, Tianyu Wang, Shuo Chen

{"title":"Regulating the electronic structure of iron sites in single-atom catalyst with interfacial chemical bond to enhance Fenton-like reaction.","authors":"Hongyu Shi, Hang Zhang, Tianyu Wang, Shuo Chen","doi":"10.1016/j.jhazmat.2025.137483","DOIUrl":"10.1016/j.jhazmat.2025.137483","url":null,"abstract":"Single-atom Fenton-like catalysts have been proven to be more efficient compared with aggregated catalysts due to abundant active sites. However, the low reduction rate of Fe(III) to Fe(II) remained the rate-limiting step for single-atom Fenton-like catalysts. Herein, carbon nanotubes with electron-withdrawing groups (CNTs-COOH) were combined with a single-atom catalyst (FeSAC) to fabricate a novel catalyst (FeSAC/CNTs-COOH, FCC-x). The optimal FCC-5/H2O2 system exhibited a 6.8 times higher pseudo-first-order kinetic constant of SMX degradation than that in FeSAC/H2O2 system. Additionally, the FCC-5/H2O2 system could maintain high catalytic activity within a wide pH range (4-9). The results of experiments and calculations co-verified the formation of Fe-O bonds between CNTs-COOH and FeSAC, which significantly reduced the electronic density of Fe(III) sites and further accelerated Fe(III) reduction to Fe(II), hence boosted the Fenton reaction. Quenching experiments and EPR measurements confirmed that hydroxyl radicals (⋅OH) were the primary active species responsible for pollutant degradation. The degradation pathway and toxicity analysis indicated that FCC-5/H2O2 was an eco-friendly reaction system. This study will provide a promising method for enhancing the performance of single-atom Fenton-like catalysts and offers insights into the underlying mechanisms.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"488 ","pages":"137483"},"PeriodicalIF":0.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375067","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}

引用次数: 0

Gene biomarkers in estuarine oysters indicate pollution profiles of metals, brominated flame retardants, and poly- and perfluoroalkyl substances in and near the Laizhou Bay. 河口牡蛎的基因生物标志物显示了莱州湾及其附近地区的金属、溴化阻燃剂、多氟和全氟烷基物质污染概况。

Journal of hazardous materials Pub Date : 2024-12-05 Epub Date: 2024-11-12 DOI: 10.1016/j.jhazmat.2024.136484

Changlin Song, Liping You, Jianhui Tang, Shuang Wang, Chenglong Ji, Junfei Zhan, Bo Su, Fei Li, Huifeng Wu

{"title":"Gene biomarkers in estuarine oysters indicate pollution profiles of metals, brominated flame retardants, and poly- and perfluoroalkyl substances in and near the Laizhou Bay.","authors":"Changlin Song, Liping You, Jianhui Tang, Shuang Wang, Chenglong Ji, Junfei Zhan, Bo Su, Fei Li, Huifeng Wu","doi":"10.1016/j.jhazmat.2024.136484","DOIUrl":"10.1016/j.jhazmat.2024.136484","url":null,"abstract":"The Laizhou Bay (LZB) is of ecological and fishery importance. The discharge of effluents containing numerous pollutants into the LZB via rivers poses significant risks to ecosystem and human health. Estuarine biomonitoring is therefore crucial for assessing the contribution of rivers to coastal pollution and their impacts on species. Estuarine oyster Crassostrea gigas is a preferable bioindicator to pollution conditions. This study measured accumulation of contaminants and expression levels of gene biomarkers in the LZB and Northern Shandong Peninsula (NSP) oysters. The LZB oysters accumulated higher levels of brominated flame retardants (BFRs) and poly- and perfluoroalkyl substances (PFAS), while NSP oysters exhibited greater accumulation of heavy metals. Decabromodiphenyl ethane was the dominant BFR, while perfluorooctanoic acid and perfluoro-2-methoxyacetic acid were the dominant PFASs in oysters. The expression of gene biomarkers effectively distinguished the LZB and NSP oysters, with CYP2 subfamilies expression correlating with BFRs and PFASs and metallothionein expression indicating heavy metals. The reproductive endocrine and neuroendocrine-immune systems in oysters might be the targets of BFRs and heavy metal pollution, respectively. The negative correlation between contaminant accumulation and gene expression might be explained by adaptive evolution, emphasizing the need to consider genetic diversity in ecological risk assessments.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"480 ","pages":"136484"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142635221","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}

引用次数: 0

Square-wave pulsed potential driven electrocatalytic degradation of 4-chlorophenol using Fe-Ni/rGO/PPy@NF three dimensional electrode. 使用 Fe-Ni/rGO/PPy@NF 三维电极对 4-氯苯酚进行方波脉冲电位驱动电催化降解。

Journal of hazardous materials Pub Date : 2024-12-05 Epub Date: 2024-10-04 DOI: 10.1016/j.jhazmat.2024.136054

Bei Ma, Bobing Lu, Hanyu Tang, Hui Wang, Zhaoyong Bian

{"title":"Square-wave pulsed potential driven electrocatalytic degradation of 4-chlorophenol using Fe-Ni/rGO/PPy@NF three dimensional electrode.","authors":"Bei Ma, Bobing Lu, Hanyu Tang, Hui Wang, Zhaoyong Bian","doi":"10.1016/j.jhazmat.2024.136054","DOIUrl":"10.1016/j.jhazmat.2024.136054","url":null,"abstract":"To develop an energy-efficient system for the removal of chlorinated organic pollutants, Fe-Ni/reduced graphite oxide/polymerized polypyrrole@nickel foam was constructed as a catalytic cathode for pulsed electrocatalytic degradation, where cathode-catalyzed production of hydrogen radicals (H*) and hydroxyl radical (·OH) generated at the anode led to dechlorination of 4-chlorophenol (4-CP), and dechlorination products were mineralized and degraded under the action of·OH. When energy was continuously supplied to the reaction system in the constant potential mode, the 4-CP concentration near the electrode was insufficient, limiting the reaction rate. Conversely, in the square-wave pulsed potential mode, mass transfer limitations were mitigated, significantly enhancing reaction efficiency and reducing energy consumption. At -1.2 V (vs. Ag/AgCl), the 4-CP removal efficiency reached 93.79 % in the pulsed potential mode, surpassing the constant potential mode's performance of 81.40 %. The synergistic periodic oscillation of the potential, direct electron transfer, and catalytic generation of active free radicals in the pulsed potential mode reduced intermediate concentrations and increased 4-CP mineralization, while the degradation pathway remained unchanged. This research presents a method for the efficient treatment of chlorinated organic pollutants in water using pulsed electrocatalytic degradation.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"480 ","pages":"136054"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142378741","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}

引用次数: 0

Gut microbiota modulation by L-Fucose as a strategy to alleviate Ochratoxin A toxicity on primordial follicle formation. 用L-岩藻糖调节肠道微生物群，减轻赭曲霉毒素A对原始卵泡形成的毒性。

Journal of hazardous materials Pub Date : 2024-12-05 Epub Date: 2024-11-12 DOI: 10.1016/j.jhazmat.2024.136469

Ruiting Wang, Jie Song, Muyu Cai, Yuan Xue, Jing Liu, Ning Zuo, Massimo De Felici, Junjie Wang, Wei Shen, Xiaofeng Sun

{"title":"Gut microbiota modulation by L-Fucose as a strategy to alleviate Ochratoxin A toxicity on primordial follicle formation.","authors":"Ruiting Wang, Jie Song, Muyu Cai, Yuan Xue, Jing Liu, Ning Zuo, Massimo De Felici, Junjie Wang, Wei Shen, Xiaofeng Sun","doi":"10.1016/j.jhazmat.2024.136469","DOIUrl":"10.1016/j.jhazmat.2024.136469","url":null,"abstract":"In this study, we investigated the potential benefits of L-Fucose administration to pregnant mice exposed to Ochratoxin A (OTA), a widespread mycotoxin, producing ovarian damage in offspring. The results showed that administration of 3.5 μg/d OTA induced alterations in intestinal tissues and gut microbiota of pregnant mice, leading to heightened local and systemic inflammation. This inflammatory affected the ovaries of their 3 dpp offspring, in which elevated levels of LPS and ROS were found associated to significant decreased oocyte count and impaired primordial follicle assembly. Moreover, mRNA-Seq analysis showed significant changes in ovarian transcriptomes linked to various GO terms and KEGG pathways, notably ferroptosis, a recognized form of cell death observed. Interestingly, administration of 0.3 g/kg b. w. L-Fucose following OTA exposure mitigated these effects on intestinal tissues and gut microbiota in mothers and on the offspring's ovaries. Similar benefits were obtained by gut microbiota transplantation from L-Fucose-treated pregnant females into OTA-exposed mothers. These findings suggest that inflammatory impact of OTA on maternal intestine/gut can pass to the fetus causing offspring ovary defects and support the use of L-Fucose as adjuvant to counteract the adverse effects of mycotoxins on the gut microbiota, particularly reference to those affecting reproductive organs.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"480 ","pages":"136469"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142635223","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}

引用次数: 0

The successive reduction of iodate to iodide driven by iron redox cycling. 在铁氧化还原循环的驱动下，碘酸根连续还原成碘化物。

Journal of hazardous materials Pub Date : 2024-12-05 Epub Date: 2024-11-08 DOI: 10.1016/j.jhazmat.2024.136436

Siqi Zhu, Zhou Jiang, Yongguang Jiang, Yiran Dong, Junxia Li, Liang Shi

{"title":"The successive reduction of iodate to iodide driven by iron redox cycling.","authors":"Siqi Zhu, Zhou Jiang, Yongguang Jiang, Yiran Dong, Junxia Li, Liang Shi","doi":"10.1016/j.jhazmat.2024.136436","DOIUrl":"10.1016/j.jhazmat.2024.136436","url":null,"abstract":"Ferrous iron (Fe(II)) produced by microbial Fe(III) reduction and reactive oxygen species (ROS) generated from aerobic Fe(II) oxidation can mediate iodate (IO3-) reduction and iodide (I-) oxidation, respectively. Nevertheless, how Fe redox cycling under redox fluctuating conditions drives transformation of iodine species remain unclear. In this study, Shewanella oneidensis MR-1 wildtype (WT) and its mutant △dmsEFAB, which lost the ability to enzymatically reduce IO3-, were chosen to conduct ferrihydrite/goethite/nontronite culture experiments under consecutive cycles of anoxic reduction of Fe(III) and re-oxidation of Fe(II) by O2 to reveal the role of Fe redox cycling in the transformation of iodine species. The results showed that both surface-adsorbed and mineral structural Fe(II) chemically reduced IO3-. Chemical IO3- reduction by biogenic Fe(II) was slower than enzymatic IO3- reduction by WT. Compared to △dmsEFAB cultures, WT cultures all showed higher Fe(II) concentrations under anoxic conditions but lower cumulative •OH under oxic conditions, which imply the chemical reaction between I- and ROS. I- oxidation by ROS, however, did not lead to a significant production of IO3- compared with I- formed under anoxic conditions. Consequently, Fe redox cycling successively reduced IO3- to I-, which highlights vital roles of Fe(III)-reducing bacteria in I- formation and mobilization in environments.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"480 ","pages":"136436"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142635231","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}

引用次数: 0

Revealing the essence of anion ligands in regulating amorphous MnOx to activate peracetic acid for micropollutant removal. 揭示阴离子配体在调节无定形氧化锰活化过乙酸以去除微污染物方面的本质。

Journal of hazardous materials Pub Date : 2024-12-05 Epub Date: 2024-10-31 DOI: 10.1016/j.jhazmat.2024.136361

Yudan Dong, Si Sun, Yunzhe Zheng, Jiamei Liu, Peng Zhou, Zhaokun Xiong, Jing Zhang, Zhi-Cheng Pan, Chuan-Shu He, Bo Lai

{"title":"Revealing the essence of anion ligands in regulating amorphous MnOx to activate peracetic acid for micropollutant removal.","authors":"Yudan Dong, Si Sun, Yunzhe Zheng, Jiamei Liu, Peng Zhou, Zhaokun Xiong, Jing Zhang, Zhi-Cheng Pan, Chuan-Shu He, Bo Lai","doi":"10.1016/j.jhazmat.2024.136361","DOIUrl":"10.1016/j.jhazmat.2024.136361","url":null,"abstract":"How the anion ligands of manganese precursors affect the catalytic activity of amorphous manganese oxides (MnOx) in Fenton-like process is poorly understood. Here, five amorphous MnOx synthesized by Mn(II) precursors with different ligands were characterized and adopted to activate peracetic acid (PAA) for bisphenol A (BPA) degradation. Although > 90 % BPA removal was achieved in the five MnOx/PAA processes via both adsorption and oxidation, the oxidation kobs greatly differentiates by the ligands types with the order of MnOx-N > MnOx-S > MnOx-Cl > MnOx-AA > MnOx-OA. Ligands types would affect the specific surface area of MnOx and their ability to adsorb BPA, however which is not the decisive factor in determining the contaminant oxidation efficiency. Multiple experimental results indicate that the generation of oxygen vacancies induced by the ligands alters the Mn(III)/Mn(IV) ratio, ultimately contributing to the different efficiency of BPA oxidation driven by the direct electron transfer mechanism. Moreover, amorphous MnOx holds the promise of practical applications in catalytic PAA of various micropollutants with good stability. This study advances the fundamental understanding of ligand-regulated amorphous MnOx-catalyzed PAA process.","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"480 ","pages":"136361"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565383","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}

引用次数: 0