Environmental Technology & Innovation最新文献

{"title":"Waste microalgal biomass-derived biochar electrode for sustainable high-performance supercapacitors: Experimental and computational insights","authors":"Zeyad M. Abdulhamid ,&nbsp;Yazan Abuhasheesh ,&nbsp;Mohamed E. Daoud ,&nbsp;Mahendra Kumar ,&nbsp;Dalaver H. Anjum ,&nbsp;Pau Loke Show ,&nbsp;Shadi W. Hasan","doi":"10.1016/j.eti.2025.104681","DOIUrl":"10.1016/j.eti.2025.104681","url":null,"abstract":"<div><div>Agricultural and algal biomass residues are emerging as promising low-cost feedstocks for energy storage electrodes. In this work, waste <em>Dunaliella salina</em> microalgal biomass was converted into biochar through pyrolysis and directly deposited onto nickel foam to fabricate a binder-free electrode. The biochar electrode exhibited a high specific capacitance of 507.9 F/g and maintained 104 % retention after 2000 continuous cycles, highlighting excellent electrochemical reversibility in alkaline electrolyte. Complementary density functional theory (DFT) simulations using a nitrogen/oxygen co-doped graphene supercell revealed a strong potassium adsorption energy, partial charge transfer to heteroatom-rich sites, and band structure modifications, including gap opening (0.1861 eV), all indicating enhanced ion affinity and transport. These theoretical findings complement the experimental results, providing a fundamental understanding of the role of heteroatom doping in optimizing electrochemical performance. This work presents a sustainable pathway for developing high-performance electrode materials using microalgal biomass wastes.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104681"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749176","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":"Heavy metals leaching control in fly ash through cement and chelating agent solidification: A microstructural evolution kinetics study","authors":"Zongyu Mu ,&nbsp;Qingqi Die ,&nbsp;Fei Wang ,&nbsp;Qifei Huang ,&nbsp;Siqi Xu ,&nbsp;Yufei Yang ,&nbsp;Zhongli Luo","doi":"10.1016/j.eti.2025.104694","DOIUrl":"10.1016/j.eti.2025.104694","url":null,"abstract":"<div><div>Heavy metals exhibit high leachability in municipal solid waste incineration fly ash (MSWI FA), which brings severe environmental threats. The solidification/stabilization (S/S) of heavy metals can not be achieved by using cement alone to comply with the regulatory standard of China. The study explored the effect and mechanism of S/S heavy metals in FA with different dosages of piperazine chelating agent (TS300) and ordinary Portland cement (OPC525). The kinetic results additionally reveal surface wash-off as the predominant leaching mechanism. This study quantified the regulatory effects of TS300 on physical transport properties of OPC525 matrix through non-reactive tracer technique. Despite the more open pore network, heavy metals were effectively immobilized, mainly due to two synergistic chemical mechanisms: the formation of stable heavy metal–thiol coordination bonds and the crystallographic transformation of hydration products from ettringite to Friedel’s salt. This chemical S/S mechanism enhanced chemical retention factors by 9–3458 fold, demonstrating that the synergistic chemical effects of coordination bond formation and hydration products optimization far exceed traditional physical encapsulation mechanisms. These findings provide new insights into dual-mechanism design strategies for heavy metals S/S.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104694"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145750282","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":"Engineering interfacial charge transfer in a MIL-68(In)/In2S3 heterojunction for highly efficient visible-light-driven Cr(VI) reduction","authors":"Xiaobin Zhou ,&nbsp;Xin Wang ,&nbsp;Mei Wang ,&nbsp;Chenyu Zhou ,&nbsp;Yinming Fan ,&nbsp;Yinian Zhu ,&nbsp;Shengpeng Mo ,&nbsp;Yanan Zhang ,&nbsp;Lihao Zhang ,&nbsp;Yijian Zhong ,&nbsp;Zongqiang Zhu","doi":"10.1016/j.eti.2026.104767","DOIUrl":"10.1016/j.eti.2026.104767","url":null,"abstract":"<div><div>Photocatalytic reduction represents a promising strategy for remediating toxic hexavalent chromium (Cr(VI)) pollution. MIL-68(In), a typical In-based metal-organic framework, is a potential photocatalyst for this purpose. However, its efficiency is often hampered by the rapid recombination of photogenerated charge carriers and a narrow visible-light response. To address these limitations, we fabricated a MIL-68(In)/In₂S₃ n-n heterojunction by controllably growing In₂S₃ on the MOF substrate, aiming to achieve highly efficient Cr(VI) reduction. Under optimized reaction conditions (pH = 4, temperature 25 °C, catalyst dosage 0.2 g·L⁻¹, initial Cr(VI) concentration 20 mg·L⁻¹), the optimized MIL-68(In)/In₂S₃ composite achieved a Cr(VI) reduction efficiency of 94.44 % within 30 min of visible light irradiation, significantly outperforming its individual components while exhibiting excellent stability and recyclability. A series of photoelectrochemical and radical trapping experiments were conducted to reveal the enhanced mechanism of photocatalytic Cr(VI) reduction. The formed heterojunction interface broadened visible-light absorption and exhibited excellent interfacial charge transfer capability and, driven by a built-in electric field, facilitated the spatial separation of charge carriers. Consequently, photogenerated electrons migrated from MIL-68(In) and accumulate on In₂S₃, directly reducing Cr(VI) to Cr(III). Simultaneously, some electrons participated in the generation of superoxide radicals (•O₂^-), which synergistically contributed to the reduction process. This work provided an effective heterojunction photocatalyst for Cr(VI) wastewater treatment and offered valuable insights for the design of MOF-based photocatalytic systems.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104767"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074122","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":"Indoor particulate matter exposure and ocular damage: Toxicity mechanisms and mitigation strategies","authors":"Mei Xiong ,&nbsp;Quanyong Yi ,&nbsp;Longyi Liu ,&nbsp;Yuxi Tang ,&nbsp;Ji Yang ,&nbsp;Hai Liu ,&nbsp;Ping Xiang","doi":"10.1016/j.eti.2025.104707","DOIUrl":"10.1016/j.eti.2025.104707","url":null,"abstract":"<div><div>Indoor particulate matter (PM) has emerged as a significant environmental risk factor for ocular health, yet the molecular mechanisms underlying PM-induced eye damage remain poorly understood. This review aims to synthesize current knowledge on the sources, molecular pathways, and mitigation strategies of indoor PM, with a focus on its ocular toxicity. Recent studies highlight that PM_2.5, due to its small size and high surface-to-volume ratio, penetrates ocular tissues, triggering oxidative stress, endoplasmic reticulum stress, and mitochondrial dysfunction. These processes are key drivers of chronic inflammation and cell death, contributing to conditions such as dry eye disease, glaucoma, and age-related macular degeneration. Notably, ferroptosis, an iron-dependent cell death pathway, has been identified as a critical mechanism in PM-induced retinal damage, offering novel therapeutic targets. Seasonal variations in PM composition further influence its cytotoxicity, with winter PM exhibiting heightened inflammatory potential. To mitigate these risks, a multi-faceted approach combining key pollutants identification, source reduction (e.g., clean energy adoption), engineering controls (e.g., air purifiers), and policy initiatives (e.g., China’s \"Coal-to-Gas\" program) has demonstrated efficacy in reducing PM-linked ocular disorders. This review underscores the need for interdisciplinary collaboration to translate mechanistic insights into practical interventions, ultimately safeguarding eye health in polluted environments.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104707"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798428","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":"Establishing genotypic-QMRA framework for protozoan health risk assessment in urban recreational waters","authors":"Zixuan Zhang ,&nbsp;Miaomiao Teng ,&nbsp;Xiaoran Gong ,&nbsp;Lihui Zhao ,&nbsp;Yunxia Li ,&nbsp;Hongbo Ma ,&nbsp;Fuwei Zhang","doi":"10.1016/j.eti.2025.104712","DOIUrl":"10.1016/j.eti.2025.104712","url":null,"abstract":"<div><div><em>Cryptosporidium</em> and <em>Giardia</em> are globally significant protozoan pathogens, frequently linked to recreational waterborne outbreaks. This study introduces a genotypic-Quantitative Microbial Risk Assessment (QMRA) framework to evaluate the occurrence, diversity, and health risks of <em>Cryptosporidium</em> and <em>Giardia</em> in urban recreational waters. A total of 104 water samples were collected from three exposure zones over two recreational seasons in 2024 and 2025. <em>Cryptosporidium</em> oocysts and <em>Giardia</em> cysts were detected in 84.6 % and 93.3 % of samples, respectively. Genotyping identified six <em>Cryptosporidium</em> species including <em>C. parvum</em> (10.6 %) and <em>C. andersoni</em> (14.4 %) and three <em>Giardia</em> assemblages, with assemblage A (12.5 %) being dominant. Risk model showed that the annual disease burden associated with recreational exposure exceeded the World Health Organization (WHO) threshold of 1.0 × 10⁻⁶ Disability-Adjusted Life Years (DALYs) per person per year. Boating and wading activities contributed the highest risks, with estimated burdens of 1.31 and 1.25 DALYs per million persons for <em>Cryptosporidium</em>, and 0.71 and 0.68 DALYs pppy (per person per year) for <em>Giardia</em>, respectively. Sensitivity analysis identified the fraction of exposed population and exposure frequency as the most influential parameters. Human fecal contamination, indicated by a moderate correlation between HF183 markers and protozoan concentrations (r = 0.34 for <em>Giardia</em>), was identified as the main source of contamination. This Genotypic-QMRA approach provides a novel and scalable tool for pathogen surveillance and health risk management in urban aquatic environments.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104712"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798520","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":"Soil property-dependent toxicity and oxidative stress induced by perfluorooctanoic acid in Caenorhabditis elegans","authors":"Caiting Mai ,&nbsp;Xiuli Dang ,&nbsp;Long Zhao ,&nbsp;Davydova Daria ,&nbsp;Fuyang Ma ,&nbsp;Mengmeng Bao ,&nbsp;Fengzhuo Geng ,&nbsp;Iseult Lynch","doi":"10.1016/j.eti.2026.104762","DOIUrl":"10.1016/j.eti.2026.104762","url":null,"abstract":"<div><div>Perfluorooctanoic acid (PFOA), a persistent organic pollutant frequently detected in soils, has received increasing attention due to growing demands for soil environmental guideline values that ensure acceptable ecological risk. However, systematic evaluations of PFOA ecotoxicity under realistic soil conditions remain limited. In this study, <em>Caenorhabditis elegans</em> (<em>C. elegans</em>) was used as a model soil organism, following ISO 10872, to assess PFOA-induced effects on growth, fertility, and reproduction after seven days of exposure in six representative Chinese soils. Oxidative stress responses were also measured, including reactive oxygen species (ROS), malondialdehyde (MDA), superoxide dismutase (SOD), and catalase (CAT). PFOA exposure significantly inhibited all biological endpoints, with EC₅₀ values of 28 ∼ 59 mg·kg⁻¹ for growth, 19 ∼ 53 mg·kg⁻¹ for fertility (expressed as the percentage of gravid adults), and 19 ∼ 39 mg·kg⁻¹ for reproduction. Soil physicochemical properties strongly influenced toxicity. Stepwise regression analysis identified cation exchange capacity (CEC), organic matter (OM), and free Fe oxides (Fe_FO) as major predictors of growth toxicity, explaining 89.7 % of the variance (<em>P</em> &lt; 0.05). For fertility and reproduction, total Fe (Fe_total) was the primary determinant, while the addition of pH, amorphous Fe/Al oxides (Fe_AO, Al_AO), and total Al (Al_total) further improved model performance. PFOA also induced pronounced oxidative stress, evidenced by increased ROS and MDA levels and biphasic SOD and CAT responses, indicating disruption of antioxidant defenses at higher exposures. Overall, these findings clarify how soil geochemistry modulates the bioavailability and ecological toxicity of PFOA, providing essential evidence for developing soil quality standards, environmental guideline values, and improved ecological risk assessments.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104762"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034619","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":"Field calibration of nitrogen-doped carbon-coated silicon carbide (NMC@SiC) passive air samplers to measure polar and non-polar semi-volatile organic compounds","authors":"Dani Khoury ,&nbsp;Supansa Chimjarn ,&nbsp;Olivier Delhomme ,&nbsp;Maurice Millet","doi":"10.1016/j.eti.2026.104761","DOIUrl":"10.1016/j.eti.2026.104761","url":null,"abstract":"<div><div>This study reports the first field calibration of nitrogen-doped carbon-coated silicon carbide (NMC@SiC) passive air samplers for measuring semi-volatile organic compounds (SVOCs) in the atmosphere of the Alsace region. The NMC@SiC samplers were deployed concurrently with conventional low-volume active samplers at a central urban site in Strasbourg, enabling direct comparison between passive and active sampling techniques. Sampling covered five two-week periods (2018–2019) plus extended three-to-four-week deployments (2019–2020). After exposure, target compounds adsorbed onto the sorbent were extracted using a two-step protocol involving accelerated solvent extraction followed by solid-phase extraction. Analytical quantification was performed via gas chromatography-mass spectrometry (GC-MS), gas chromatography-tandem mass spectrometry (GC-MS/MS), and liquid chromatography-tandem mass spectrometry (LC-MS/MS), ensuring robust compound-specific detection and quantification. NMC@SiC samplers effectively captured a broad spectrum of SVOCs, including PAHs, PCBs, organochlorine pesticides (OCPs), phenols, and organic acids. Mean sampling rates (R_s) ranged from 2.5 and 6.0 m³ day⁻¹, values comparable to or slightly exceeding those of established passive samplers. Importantly, NMC@SiC efficiently collected both highly semi-volatile and polar analytes (like phenols and carboxylic acids), underscoring its suitability for legacy and emerging pollutants. Its high surface area and polar coating facilitate uptake of both nonpolar and polar compounds, highlighting its promise as a robust tool for long-term SVOC air monitoring. This pioneering field deployment demonstrates NMC@SiC’s potential as a next-generation passive sampler for comprehensive air quality assessment.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104761"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034616","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":"Unravelling the mechanism of phytoremediation to Pb and Cd in Euonymus japonicus Thunb. using biophysiological, transcriptomic and metabolomic analyses","authors":"Haolang Liu ,&nbsp;Yongwei Gong ,&nbsp;Yuqi Qi ,&nbsp;Yu Wang","doi":"10.1016/j.eti.2025.104737","DOIUrl":"10.1016/j.eti.2025.104737","url":null,"abstract":"<div><div>Urban heavy metals (HMs) contamination necessitates sustainable eco-remediation for ecological-health security. Urban green plants are overlooked sinks for HMs, yet their molecular remediation mechanisms remain elusive. Here, we elucidate the physiological and molecular responses of <em>Euonymus japonicus</em> Thunb. to lead (Pb) and cadmium (Cd). Results demonstrate that <em>E. japonicus</em> Thunb. exhibits high tolerance to Pb and Cd (tolerance index &gt; 60), with predominant sequestration of these metals in root tissues (580.0 mg·kg⁻¹ and 83.1 mg·kg⁻¹, respectively, under high concentrations of HMs), inducing ultrastructural alterations. Detoxification under severe stress is mediated by catalase and peroxidase, rather than superoxide dismutase or glutathione. Transcriptomic analysis revealed upregulation of 15 core genes associated with detoxification, including <em>ABCG4</em>, <em>ZnT2</em>, and <em>Nramp3</em>. Metabolomic analysis revealed that root cells remodeled their metabolic regulation, including the following three aspects: (I.) amino acids and peptides (such as glycyl-phenylalanine, glutamyltyrosine, and betonicine); (II.) flavonoids (including catechin, myricetin, and persiconin); and (III.) lignan glycosides (such as occidentoside and ramontoside), thereby orchestrating stress adaptation. Multiomics analysis indicates that protein synthesis, processing, and regulation, involving amino acids, ribosomes, and the endoplasmic reticulum, along with the reprogramming of the sugar co-metabolism network and plant adaptation and stress regulation, collectively contribute to the detoxification process under Pb and Cd stress. These findings indicate that <em>E. japonicus</em> Thunb. serves as a root-accumulating plant capable of stabilizing HMs in soils severely co-contaminated with Pb and Cd, highlighting its potential for sustainable phytostabilization in urban environments.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104737"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938949","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":"Effect of freeze-thaw cycle on carbon fixation by soil microbes","authors":"Lian He ,&nbsp;Yujuan Wen ,&nbsp;Zhipeng Zhang ,&nbsp;Xiaoming Song","doi":"10.1016/j.eti.2025.104713","DOIUrl":"10.1016/j.eti.2025.104713","url":null,"abstract":"<div><div>The freeze-thaw cycle (FTC) is a common periodic process of soil change in middle and high latitudes and high altitudes. FTC can affect microbial functional genes, plant carbon input patterns and physicochemical protection mechanisms of soil organic carbon. FTC significantly affected soil carbon cycle and microbial carbon sequestration by changing soil porosity, temperature, water content and aggregate structure. However, current research lacks sufficient discussion on the long-term effects of FTC the functional mechanisms of microbial communities and soil carbon components, and the coupled effects of multiple environmental factors. This paper introduces the efficiency of the microbial carbon pump (MCP) and its related microbial indicators as key parameters into the analytical framework of the carbon cycle model. The review encompasses the following aspects: (1) the mechanisms of carbon fixation by soil microorganism; (2) response and changes in the composition and activity of soil microbial communities under freeze-thaw cyclic stress; (3) the influence of FTC on the carbon cycle under different soil depth conditions; (4) how FTC jointly affect soil carbon dynamics by regulating microbial carbon sequestration-related functional genes (involved in substrate utilization preference and carbon use efficiency) and their interactions with plant organic carbon input patterns. This review systematically integrates research findings on the effects of FTC on soil carbon pools and microbial carbon sequestration, clarifies core mechanisms and research gaps, and provides key support for theoretical refinement, ecological conservation, and carbon sink management in related fields, promoting interdisciplinary research integration.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104713"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938950","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":"Competitive-cooperative microbial dynamics drive water quality regulation in industrial recirculating shrimp aquaculture","authors":"Shenqun An ,&nbsp;Lianbo Zhang ,&nbsp;Jinyu Du ,&nbsp;Xiaoliang Ren ,&nbsp;Zhong Zhuang ,&nbsp;Biaobiao Jiang ,&nbsp;Yafei Liu ,&nbsp;Guang Yang","doi":"10.1016/j.eti.2025.104732","DOIUrl":"10.1016/j.eti.2025.104732","url":null,"abstract":"<div><div>Carbon (C) and nitrogen (N) content in recirculating aquaculture systems (RAS) are considered key to maintaining water quality stability, primarily governed by feeding and microbial processes. However, the interaction between dynamic changes in C and N content and microbial community structure remains unclear, which limits technological innovation. This study aims to investigate the relationship between C and N dynamics and microbial community structure in <em>L</em>. <em>vannamei</em> aquaculture. The results demonstrated that microbial community structure was primarily shaped by C and N metabolic taxa. From early (25 d) to mid-culture (50 d), a decrease in N-removing genera (<em>e</em>.<em>g</em>., <em>Ferruginibacter</em> and <em>Microbacterium</em>) correlated with rising NO₃^--N (20.52–47.78 mg L⁻¹), while an increase in C-removing genera (<em>e</em>.<em>g</em>., <em>Polynucleobacter</em> and <em>Jeongeupia</em>) paralleled the decline in COD (222.50–191.50 mg L⁻¹), indicating competitive interaction between functional groups. In the late period (after 50 d), the community stabilized with high structural similarity to earlier period, suggesting functional convergence and coexistence after succession. This study elucidates the dynamic co-occurrence patterns between microbial functional groups throughout shrimp growth, offering novel insights for precise water quality management in recirculating aquaculture systems.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104732"},"PeriodicalIF":7.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938968","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}