解码饮用水水库沉积物中产生味道和气味的放线菌：群落分布和碳代谢偏好

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-07-26 DOI:10.1016/j.jwpe.2025.108407

Xiang Liu , Tingting Pei , Tinglin Huang , Danhong Yang , Min Fu , Shengzhao Jing , Ben Ma , Xiaoyan Liu , Jianchao Shi , XinJian Niu , Hongbin Sang , Haihan Zhang

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引用次数: 0

摘要

沉积物中的放线菌是水库中味道和气味（T&；O）问题的潜在贡献者。阐明沉积物中放线菌群落的空间分布及其碳代谢机制对减少放线菌产生气味具有重要意义。对中国14个水库沉积物样品进行了恶臭化合物浓度、放线菌群落、功能基因和碳代谢活性分析。结果表明，2-甲基异龙心醇（2-MIB）（11.7 ~ 49.6 ng/g）和土臭素（GSM）（低于检测值至2.5 ng/g）具有显著的空间异质性，总氮和沉积物有机质是主要的环境驱动因素。除未分类属外，链霉菌属、分枝杆菌属和hgcI_clade是沉积物样品中主要的放线菌属。此外，放线菌，特别是链霉菌，与2-MIB的产生相关。功能基因分析和bio - eco将放线菌与碳降解和氮循环联系起来，强调它们在生物地球化学过程和气味产生中的双重作用。结构方程模型进一步强调了营养物和金属富集作为微生物代谢活性的催化剂，放大了放线菌的优势和T&；O生物合成。这些发现强调了沉积物放线菌是降低水库T&；O风险的关键目标，为饮用水水库T&；O污染管理提供了科学依据。

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Decoding taste & odor - producing actinobacteria in drinking water reservoir sediments: Community distribution and carbon metabolic preferences

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Decoding taste & odor - producing actinobacteria in drinking water reservoir sediments: Community distribution and carbon metabolic preferences

Actinobacteria in sediments serve as potential contributors to taste and odor (T&O) issues in reservoirs. Elucidating the spatial distribution of sediment-dwelling actinobacterial community and their carbon metabolic mechanisms is essential for mitigating odorant production by actinobacteria. Sediment samples from 14 reservoirs in China were analyzed for odor compound concentration, actinobacterial communities, functional genes, and carbon metabolic activity. Results revealed significant spatial heterogeneity in 2-methylisoborneol (2-MIB) (11.7–49.6 ng/g) and geosmin (GSM) (below detection to 2.5 ng/g), with total nitrogen and sediment organic matter as key environmental drivers. Expect unclassified genus, Streptomyces sp., Mycobacterium sp., and hgcI_clade were the dominant actinobacterial genus in sediment samples. In addition, actinobacteria, particularly Streptomyces sp., exhibited correlations with 2-MIB production. Functional gene analysis and Biolog-ECO linked actinobacteria to carbon degradation and nitrogen cycling, emphasizing their dual roles in biogeochemical processes and odorant generation. Structural equation modeling further highlighted nutrient and metal enrichment as catalysts for microbial metabolic activity, amplifying actinobacterial dominance and T&O biosynthesis. These findings underscore sediment actinobacteria as critical targets for mitigating reservoir T&O risks, scientific basis for the management of T&O pollution in drinking water reservoirs.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies