Factors of microbial degradation of organic pollutants: Two meta-analyses

IF 9.7 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Shibin Liu, Li Guo, Chunyu Xiang, Bowei Zhu, Wenbin Huang, Lin Tian, Jiancheng Tang, Zhanpeng Dai, Ekaterina Filimonenko, Ramzi Mekhalif, Hanzhong Jia, Yakov Kuzyakov
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引用次数: 0

Abstract

Microbial degradation of organic pollutants is crucial to mitigate environmental risks to wildlife and humans. This capacity hinges on factors such as microbial community composition, environmental conditions, pollutant characteristics, and the presence of metals/metalloids, surfactants, or co-metabolites. Our meta-analyses, covering 3,095 data pairs across 158 microbial species and 148 pollutants, offer insights into the factors regulating microbial degradation of organic pollutants in sterilized mediums. Degradation rates were dependent on the compounds: hormones degrade fastest, largely by Basidiomycota fungi. Microbial monocultures have superior overall degradation capacity (+35%·day-1) compared to mixed co-cultures (+8%·day-1), particularly because monocultures have a 3.6 times faster initial 5-day degradation rate. Fungal monocultures demonstrate greater resilience to additional compounds (i.e., metals/metalloids, co-metabolites, surfactants) than bacterial monocultures, attributed to their broader enzymatic and metabolic capabilities. Degradation rates under aerobic conditions are sevenfold faster than in anoxic environments, as oxygen is the strongest electron acceptor, boosting energy production for microorganisms. Metals/metalloids generally reduce microbial degradation efficiency (-21%), primarily by reducing oxidoreductase activities (-54%). Surfactants accelerate degradation (+18%) by solubilization of hydrophobic compounds and increasing oxidoreductase (+27%) and hydrolase (+44%) activities. Biosurfactants perform exceptionally (+45%) by increasing pollutant solubility and altering microbial cell membrane permeability. These findings generalize effective strategies to accelerate microbial degradation of organic pollutants and to optimize remediation conditions in contaminated environments.

Abstract Image

微生物降解有机污染物对于减轻环境对野生动物和人类的危害至关重要。这种能力取决于微生物群落组成、环境条件、污染物特征以及金属/类金属、表面活性剂或共代谢物的存在等因素。我们的荟萃分析涵盖了 158 种微生物和 148 种污染物的 3,095 对数据,有助于深入了解灭菌培养基中有机污染物微生物降解的调节因素。降解率取决于化合物:激素降解最快,主要由半知菌类真菌降解。微生物单一培养物的总体降解能力(+35%-day-1)优于混合共培养物(+8%-day-1),特别是因为单一培养物的最初 5 天降解率是混合共培养物的 3.6 倍。与细菌单培养物相比,真菌单培养物对其他化合物(如金属/类金属、共代谢物、表面活性剂)的适应能力更强,这归功于其更广泛的酶和代谢能力。有氧条件下的降解速度比缺氧环境下快七倍,因为氧气是最强的电子受体,可促进微生物的能量生产。金属/类金属通常会降低微生物的降解效率(-21%),主要是通过降低氧化还原酶的活性(-54%)。表面活性剂通过溶解疏水性化合物,提高氧化还原酶(+27%)和水解酶(+44%)的活性,从而加速降解(+18%)。生物表面活性剂通过增加污染物的溶解度和改变微生物细胞膜的渗透性,使降解效果更佳(+45%)。这些发现推广了加速微生物降解有机污染物和优化污染环境修复条件的有效策略。
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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