Journal of Hazardous Materials最新文献

{"title":"2,2′,4,4′-Tetrabromodiphenyl ether and copper disturbed the source-to-sink allocation of sucrose in rice through regulating the NAC23-Tre6P-SnRK1a signaling pathway","authors":"Qian Liu ,&nbsp;Anmin Gao ,&nbsp;Wei Wang ,&nbsp;Chun Zhou ,&nbsp;Lizhong Zhu ,&nbsp;Jie Chen","doi":"10.1016/j.jhazmat.2025.138083","DOIUrl":"10.1016/j.jhazmat.2025.138083","url":null,"abstract":"<div><div>The co-occurrence of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) and copper (Cu) in agricultural fields pose significant implications for crop growth and grain production. This study explored their individual and combined effects on rice crops and elucidated the underlying mechanisms combining <em>in vivo</em>, <em>in vitro</em>, and <em>in silico</em> investigations. Both BDE-47 and Cu inhibited shoot biomass, whereas root biomass exhibited distinct profiles: BDE-47 inhibited it, while Cu promoted it, at environmentally relevant exposure concentrations. This phenomenon was attributed to differences in sucrose transport between the source (shoot) and sink (root). Furthermore, metabolic, transcriptional, and translational analyses unveiled that this process was modulated by the NAC23-Tre6P-SnRK1a signaling pathway, with the dysfunction of fructose-1,6-diphosphate aldolase (FBA) and alterations in intracellular sucrose level serving as the crucial negative factors. Both contaminants bound to FBA, disrupting glucose signal transmission and upregulating SnRK1a expression. Additionally, BDE-47 suppressed sucrose levels, thereby reducing NAC23 activity and inhibiting sucrose transport. Conversely, Cu significantly elevated sucrose levels, mitigating the adverse effects of SnRK1a on NAC23 and enhancing sucrose transport. Interestingly, the coexistence of Cu with BDE-47 synergistically inhibited sucrose transport, further reducing root biomass and lowering the toxicity threshold of BDE-47 on rice crops. This study offered novel insights into the signaling regulatory mechanisms governing the differential impacts of BDE-47 and Cu on rice growth and yield production, facilitating more accurate assessments of their phytotoxicity and informing scientific regulatory frameworks for croplands.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138083"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758396","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":"Anti-interference Detection of Antibiotic Resistance Genes via Tetrahedral DNA Framework–Velcro Capturing Py-HOF@Ti3C2 MXene","authors":"Liqi Liu ,&nbsp;Xujing Feng ,&nbsp;Yi Zou ,&nbsp;Tiantian Xia ,&nbsp;Fenying Kong ,&nbsp;Tingting Zhang ,&nbsp;Lingliang Long ,&nbsp;Kun Wang ,&nbsp;Nan Hao","doi":"10.1016/j.jhazmat.2025.138146","DOIUrl":"10.1016/j.jhazmat.2025.138146","url":null,"abstract":"<div><div>Methicillin-resistant Staphylococcus aureus (MRSA) is rapidly spreading worldwide. Concurrently, numerous antibiotic resistance genes (ARGs) have escaped into complex natural environments, particularly in water environment. Among these, mecA is one of the most prevalent ARGs identified in MRSA. Consequently, the development of robust analytical methods for detecting ARGs is critically important. This study effectively designed and constructed a tetrahedral DNA framework array termed “Velcro”. By initiating the catalytic hairpin assembly (CHA) of the target loop through mecA, the “stickiness” of Velcro is stimulated, enabling efficient capture of, the composite of hydrogen-bonded organic frameworks (HOFs) with aggregation-induced electrochemiluminescence (AIECL) activity and co-reaction accelerator Ti₃C₂ MXene (TCM). Concurrently, the stable DNA framework can effectively withstand various environmental interferences, including bacterial invasion and enzymatic degradation, thereby enabling the sensitive detection and analysis of antibiotic resistance genes in complex environments. The linear range of the proposed ECL Biosensor for ARGs (mecA) detection was 0.01 pM to 10<!--> <!-->nM, with a detection limit of 2.3 fM. This research proposes a novel approach for tracing this new type of genetic contamination and holds significant reference value for the scientific application of antibiotics.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138146"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758138","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":"DL-alanine promotes the colonization of Pseudomonas aeruginosa and their synergistic enrichment of selenium and decrease of cadmium absorption by Brassica napus","authors":"Huan Zhang ,&nbsp;Hua Zhang ,&nbsp;Wenju Liu ,&nbsp;Zheng Lei ,&nbsp;Yin Wang ,&nbsp;Jiandong Sheng ,&nbsp;Zhen Wang ,&nbsp;Chengxiao Hu ,&nbsp;Xiaohu Zhao","doi":"10.1016/j.jhazmat.2025.138154","DOIUrl":"10.1016/j.jhazmat.2025.138154","url":null,"abstract":"<div><div>In selenium-rich regions, selenium and cadmium coexist in soil, posing a threat to agricultural product safety. This study explores the influence of <em>Pseudomonas aeruginosa</em> and DL-alanine on selenium and cadmium uptake in <em>Brassica napus</em>. Through pot and medium experiments, along with FTIR and XPS analyses, we found that DL-alanine significantly boosts <em>Pseudomonas aeruginosa</em> biofilm formation and root colonization. Compared with the control group, the combined treatment of DL-alanine and <em>Pseudomonas aeruginosa</em> increased the selenium content in the shoots by 55.8 %, and decreased the cadmium content in the shoots and roots by 66.3 % and 67.9 %, respectively. The direct reason for this result is that the available selenium in the rhizosphere soil increased by 32 % and the available cadmium decreased by 10 %. Further investigation shows that DL-alanine promotes the transformation of Se(0) to Se(-II) and the formation of CdSe nanoparticles by <em>Pseudomonas aeruginosa</em>, which enhances the availability of selenium and reduces that of cadmium. Furthermore, gene expression analysis revealed that the expression levels of selenium-related genes were upregulated, while those of cadmium transport genes were downregulated. This study proposes a new method for improving selenium utilization and reducing cadmium absorption in soils where selenium and cadmium coexist, providing a theoretical basis for safer agricultural practices.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138154"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758384","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":"Dynamic adsorption and molecular simulation of aliphatic VOCs on industrial USY zeolites: Two-component competitive behavior","authors":"Wei Liu ,&nbsp;Guiming Chen ,&nbsp;Qing Li ,&nbsp;Tengfei Guo ,&nbsp;Yanxia Wang ,&nbsp;Lingmin Sun ,&nbsp;Jiangshan Zhao ,&nbsp;Dongjun Lv ,&nbsp;Xihao Yu ,&nbsp;Min Wang ,&nbsp;Weiwei Li ,&nbsp;Zhigang Wang","doi":"10.1016/j.jhazmat.2025.138161","DOIUrl":"10.1016/j.jhazmat.2025.138161","url":null,"abstract":"<div><div>In this study, the single-component and two-component competitive adsorption behaviors of six aliphatic VOCs (cyclohexane, n-hexane, methyl-cyclopentane, n-butanol, butyl-acetate and methyl-methacrylate) on industrial USY zeolites were systematically investigated through dynamic adsorption experiments and molecular simulations. The results of the single-component dynamic adsorption experiments showed that the saturated adsorption capacity of high-polarity VOCs (n-butanol, butyl-acetate and methyl-methacrylate) were significantly higher than low-polarity VOCs (cyclohexane, n-hexane and methyl-cyclopentane) on USY-10, USY-40 and USY-60 zeolites. Furthermore, the high-polarity VOCs with high molecular weights and boiling points had weak diffusion properties and strong adsorption capacity on USY zeolites. In two-component competitive adsorption experiments, the competitive adsorption abilities of high-polarity VOCs exhibited stronger than low-polarity VOCs on USY-60. Meanwhile, linear-structured molecules demonstrated competitive advantages owing to their superior diffusion capabilities. Single-component DFT calculation results showed that the adsorption energy of high-polarity VOCs (from −181.29 KJ/mol to −140.49 KJ/mol) was significantly more negative than low-polarity VOCs (from −122.47 KJ/mol to −99.07 KJ/mol) on USY zeolites. The adsorption site calculations of two-component adsorption on USY-60 indicated that high-polarity VOCs interacted more strongly with Na⁺ ions. The energy calculation results of two-component competitive adsorption indicated that high-polarity and linear-structured VOCs exhibited low interaction energies on USY-60. This study provided theoretical insights and practical guidance for the removal of industrial two-component VOCs.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138161"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758610","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":"Combat Against Antibiotic Resistance Genes during Photo-Treatment of Magnetic Zr-MOFs@Layered Double Hydroxide Heterojunction: Conjugative Transfer Risk Mitigating and Bacterial Inactivation","authors":"Yu Liu, Mingyang Xu, Lingxin Zhao, Shufei He, Likui Feng, Liangliang Wei","doi":"10.1016/j.jhazmat.2025.138160","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138160","url":null,"abstract":"The dissemination of antimicrobial resistance (AMR) in wastewater treatment poses a severe threat to the global ecological environment. This study explored the effectiveness of photocatalysis in inactivating antibiotic resistant bacteria (ARB) and quantitatively clarified the inhibiting rate of the transfer of antibiotics resistance genes (ARGs). Herein, the magnetic heterojunction as UiO-66-NH₂@CuFe LDH-Fe₃O₄ (UN-66@LDH-Fe) effectively facilitated the electron-hole separation and accelerated the photogenerated charge transfer, thereby guaranteeing the stable practical application in aeration tanks. Notably, the internal electric field of heterogeneous photocatalyst resulted in significant increase of ARGs inactivation, achieving 5.63<!-- --> <!-- -->log of ARB, 3.66<!-- --> <!-- -->log of <em>tet</em>A and 3.57<!-- --> <!-- -->log of <em>Ampr</em> genes were photodegraded under optimal reaction conditions within 6<!-- --> <!-- -->h. Based on the complex microbial and molecular mechanism of multiple-ARB communities inactivation in photo-treatment, the photogenerated reactive oxygen species (ROSs, ·OH and ·O₂⁻) effectively destroyed bacterial membrane protein, thereby the intracellular ROSs and redox cycles further induced oxidative stress, attributing to the abundance reduction of ARGs and their host bacteria. Moreover, long-term (7 days) continuous operation preliminarily verified the practical potential in reducing AMR spread and developing wastewater treatment efficacy. Overall, this study presented an advantageous synergistic strategy for mitigating the AMR-associated environmental risk in wastewater treatment.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"13 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758376","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":"A Dual-Functional Fluorescent Probe Based on Coumarin Derivative for Highly Sensitive and Intelligent Detection of Zn2+/Cu2+ and Cell Imaging","authors":"Su-Qian CAI, Le LIANG, Yong-qing LIU, Jun-Gang WANG, Xiao-Hua CAI","doi":"10.1016/j.jhazmat.2025.138104","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2025.138104","url":null,"abstract":"Fluorescent molecules are widely used in detection of molecules and ions, medical diagnosis and bio-imaging because of their advantages such as non-damage, less interference, good specificity and sensitivity. Zinc and copper ion (Zn²⁺/Cu²⁺) are important micro-nutrients and pollutants to require rapid determination and monitoring. In this work, a fluorescent probe <strong>L</strong> with fast response, good stability and wide pH ranges starting from inexpensive and readily available substrates was synthesized via a simple synthetic process. Based on fluorescence emission enhancing or quenching, probe <strong>L</strong> can sensitively detect Zn²⁺ and Cu²⁺ with the lowest detection limits of 4.99×10^-7 and 3.56×10^{-10<!-- -->}mol/L, respectively. The mechanisms on Zn²⁺ and Cu²⁺ recognition had been further disclosed by spectral analysis, density functional theory calculations and single crystal<em>.</em> An intelligent sensing system based on probe <strong>L</strong> hydrogel chip and smartphone had conveniently been constructed to carry out rapid and portable determination of Zn²⁺and Cu²⁺. Moreover, probe <strong>L</strong> can also be applied to fluorescence imaging of live cells and detection of water samples, indicating that probe <strong>L</strong> may have good application potential in environmental analysis and biomedicine.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"1842 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758612","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":"COF nanotubes/2D nanosheets heterojunction for superior photocatalytic bactericidal activity even at low concentration and weak light","authors":"Saijun Wu ,&nbsp;Minglong Yan ,&nbsp;Yuchen Zhong ,&nbsp;Jianjun Cheng ,&nbsp;Wenjie Zhao","doi":"10.1016/j.jhazmat.2025.138111","DOIUrl":"10.1016/j.jhazmat.2025.138111","url":null,"abstract":"<div><div>Microbial fouling is a huge nuisance to equipment operation and human health. Two-dimensional (2D) photocatalytic materials such as g-C₃N₄, WSe₂, and Ti₃C₂T_x, show immense potential for solar-driven eradication of microbial fouling. However, limited photon absorption and rapid photogenerated electron-hole recombination curtail their photocatalytic efficiency and availability, resulting in the necessity to operate at high concentration and strong light. Herein, three kinds of covalent organic frameworks (COF) nanotubes/2D nanosheets heterojunctions (COF-x) were flexibly constructed by in-situ growing COF nanotubes on g-C₃N₄, WSe₂, and Ti₃C₂T_x nanosheet substrates via one-pot method. The internal electric field at the COF-x coupling interface enhanced the separation and migration of photogenerated charge pairs, contributing to the antimicrobial reactive oxygen species (ROS) produced by COF-x, which was 2.8–270 times more efficient than those of nanosheets. The bactericidal effect enhanced from 34.13 %∼41.68 % of pure nanosheets to over 99.86 % of COF-x at an ultra-low concentration of 2 µg/mL and a weak visible light of 15 mW/cm². At a low concentration of 20 µg/mL, the bactericidal rate of COF-x achieved nearly 100 % within 6 h. COF-x also showed exceptional environmental stability and antimicrobial properties under heat, light, acid, alkali, and aqueous conditions, offering a new perspective in photocatalytic antimicrobial/antifouling.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138111"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758374","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":"Rhodobacter sphaeroides reduces Pb accumulation by reshaping the intestinal microenvironment and improving liver oxidant resistance in common carp (Cyprinus carpio L.)","authors":"Qian Zhou ,&nbsp;Yi Pu ,&nbsp;Hongmei Deng ,&nbsp;Jiayi Gong ,&nbsp;Lin Guo ,&nbsp;Jiayi Ma ,&nbsp;Lisha Liu ,&nbsp;Shu Yuan ,&nbsp;Yanger Chen ,&nbsp;Yanqiu Su","doi":"10.1016/j.jhazmat.2025.138152","DOIUrl":"10.1016/j.jhazmat.2025.138152","url":null,"abstract":"<div><div>In recent years, the application of probiotics to reduce lead (Pb) toxicity in organisms has gained attention. Our previous studies showed that <em>Rhodobacter sphaeroides</em> SC01 exhibits high Pb tolerance and efficient Pb removal from aqueous solution. In this study, the capacity and mechanisms in alleviating Pb toxicity was investigated using strain SC01 in common carp (<em>Cyprinus carpio</em> L.). Results showed strain SC01 successfully colonized the intestine of common carp under Pb exposure, thereby enhancing the abundance of <em>Rhodobacter</em>, heavy-metal-tolerant, and denitrifying bacteria, which ameliorated intestinal microenvironment and enhanced gut microbiota diversity. Strain SC01 supplementation promoted the increase in beneficial metabolites, enhanced the anti-stress capability, and facilitated damage repair in intestine. The Pb-induced alterations of gene expression in the tight junction proteins (<em>Claudin-3c</em>) and pro-inflammatory cytokines (<em>IL-1β</em> and <em>IL-6</em>) were obviously reversed by strain SC01. Dietary administration of strain SC01 offered direct protection against Pb-induced oxidative stress in liver, and had several beneficial effects on hematological responses and growth performance of carp. Pb accumulation in intestinal contents, intestine, liver, kidney, and blood were markedly decreased compared to the Pb group. Therefore, <em>R. sphaeroides</em> SC01 may be a novel dietary supplement that enhances fish growth performance and mitigates Pb-induced toxicity in aquaculture.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138152"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758382","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":"Stable isotope probing and oligotyping reveal the impact of organophosphorus pesticides on the carbon fixation related bacterioplankton lineage","authors":"En Xie ,&nbsp;Ziwei Chen ,&nbsp;Xu Zhang ,&nbsp;Xinyuan Zhang ,&nbsp;Lei Zheng ,&nbsp;Xue Wang ,&nbsp;Dayi Zhang","doi":"10.1016/j.jhazmat.2025.138159","DOIUrl":"10.1016/j.jhazmat.2025.138159","url":null,"abstract":"<div><div>Freshwater bacterioplankton communities play a pivotal role in global carbon fixation and energy exchange. However, establishing direct linkages between environmental stressors like organophosphorus pesticides (OPPs) and the ecological functions, such as carbon-fixing related microorganisms (CFMs), remains challenging. This study investigated the effects of four OPPs — two phosphates (dichlorvos, monocrotophos) and two phosphorothioates (omethoate, parathion) — on bacterioplankton communities using stable isotope probing, high-throughput sequencing and oligotyping analysis. Seven CFMs were identified. All OPPs significantly reduced total biomass (from 7.87 ×10⁴ to 2.30–4.11 ×10⁴ cells/mL) but stimulated CFMs proliferation. Notably, phosphorothioates induced a greater increase in CFMs abundance (36.84 %–57.18 %, up from 21.1 %) compared to phosphates (23.85 %–37.10 %; <em>p</em> &lt; 0.05). Principal coordinate analysis (PCoA) revealed that phosphorothioates exerted stronger effects on microbial community and CFMs oligotypes structure compared to phosphates (<em>p</em> &lt; 0.05). Variance partitioning analysis (VPA) identified pesticide type as the dominant driver of community structure. PICRUSt2 prediction demonstrated that OPPs suppressed oxidoreductase pathways linked to energy metabolism while activating transferase pathways associated with microbial stress resistance. Phosphorothioates depleted 64 pathways and enhanced 208 pathways, far exceeding phosphate impacts (2 depleted, 22 enhanced), indicating the phosphorothioates played a more important role on bacterioplankton communities than phosphate. Additionally, OPPs exposure reduced functional redundancy and destabilized community stability in bacterioplankton, potentially granting CFMs a long-term competitive advantage and elevating algal bloom risks. These findings provide insights into active CFMs in aquatic systems and their responses to diverse OPPs, offering new perspectives for managing organophosphorus pesticide contamination.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138159"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758380","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":"Elemental sulfur facilitates co-metabolism of Cr(VI) and nitrate by autotrophic denitrifiers in constructed wetlands","authors":"Mengmiao Tu ,&nbsp;Hua Lin ,&nbsp;Xinyue Zhang ,&nbsp;Xuehong Zhang ,&nbsp;Jun Yan","doi":"10.1016/j.jhazmat.2025.138153","DOIUrl":"10.1016/j.jhazmat.2025.138153","url":null,"abstract":"<div><div>The antagonistic microbial reduction of chromate and nitrate poses significant challenges for their simultaneous removal in autotrophic denitrifying systems. This study explored the treatment performance and mechanisms for the simultaneous removal of chromate (0, 2, and 10 mg·L⁻¹) and nitrate (20 mg·L⁻¹) in constructed wetland (CW) microcosms with elemental sulfur additions at 0-, 5-, and 25-times background levels. Results showed that sulfur-amended microcosms achieved chromate and nitrate removal up to 76.46 % and 28.12 % higher, respectively, than 0S groups. Notably, the nitrate removal rate constant was higher in the presence of chromate than its absence, exclusively in the 25S groups. In a sediment core assay, the 25S groups also exhibited substantially facilitating effect of chromate removal potential in the presence of nitrate. Metagenomic analyses revealed upregulations of denitrification and sulfur oxidation-related functional genes along with sulfur supplementation. Autotrophic denitrifiers including <em>Dechloromonas</em>, <em>Thiobacillus</em>, <em>Sulfuricella</em>, and <em>Sulfuritalea</em> made significant contributions to chromate and nitrate removal rates, as well as functional genes encoding sulfur, nitrogen, and chromium transformation, in response to sulfur addition. These findings shed first light on the co-metabolism of chromate and nitrate by sulfur-based autotrophic denitrifiers, emphasizing their pivotal role in denitrification systems, e.g., CWs, with chromate inputs.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138153"},"PeriodicalIF":12.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758133","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}