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酚类污染物的生物降解及生物强化策略:现有知识与未来展望的综述

Biodegradation of phenolic pollutants and bioaugmentation strategies: A review of current knowledge and future perspectives.

机构信息

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Quanzhou Institute for Environment Protection Industry, Nanjing University, Quanzhou 362000, China.

出版信息

J Hazard Mater. 2024 May 5;469:133906. doi: 10.1016/j.jhazmat.2024.133906. Epub 2024 Feb 28.

Abstract

The widespread use of phenolic compounds renders their occurrence in various environmental matrices, posing ecological risks especially the endocrine disruption effects. Biodegradation-based techniques are efficient and cost-effective in degrading phenolic pollutants with less production of secondary pollution. This review focuses on phenol, 4-nonylphenol, 4-nitrophenol, bisphenol A and tetrabromobisphenol A as the representatives, and summarizes the current knowledge and future perspectives of their biodegradation and the enhancement strategy of bioaugmentation. Biodegradation and isolation of degrading microorganisms were mainly investigated under oxic conditions, where phenolic pollutants are typically hydroxylated to 4-hydroxybenzoate or hydroquinone prior to ring opening. Bioaugmentation efficiencies of phenolic pollutants significantly vary under different application conditions (e.g., increased degradation by 10-95% in soil and sediment). To optimize degradation of phenolic pollutants in different matrices, the factors that influence biodegradation capacity of microorganisms and performance of bioaugmentation are discussed. The use of immobilization strategy, indigenous degrading bacteria, and highly competent exogenous bacteria are proposed to facilitate the bioaugmentation process. Further studies are suggested to illustrate 1) biodegradation of phenolic pollutants under anoxic conditions, 2) application of microbial consortia with synergistic effects for phenolic pollutant degradation, and 3) assessment on the uncertain ecological risks associated with bioaugmentation, resulting from changes in degradation pathway of phenolic pollutants and alterations in structure and function of indigenous microbial community.

摘要

酚类化合物的广泛使用使其在各种环境基质中存在,造成生态风险,尤其是内分泌干扰效应。基于生物降解的技术在降解酚类污染物方面效率高且具有成本效益,二次污染产生较少。本综述以苯酚、壬基酚、对硝基苯酚、双酚 A 和四溴双酚 A 为代表,总结了它们生物降解的最新知识和未来展望,以及生物增强的增强策略。主要在好氧条件下研究了酚类污染物的生物降解和降解微生物的分离,其中酚类污染物通常先被羟基化为 4-羟基苯甲酸或对苯二酚,然后再开环。在不同的应用条件下(例如,在土壤和沉积物中降解效率提高 10-95%),酚类污染物的生物增强效率有很大差异。为了优化不同基质中酚类污染物的降解,讨论了影响微生物生物降解能力和生物增强性能的因素。提出了使用固定化策略、土著降解菌和高能力的外源菌来促进生物增强过程。建议进一步研究 1)在缺氧条件下酚类污染物的生物降解,2)具有协同效应的微生物群落在酚类污染物降解中的应用,以及 3)生物增强与酚类污染物降解途径的变化以及土著微生物群落结构和功能的改变相关的不确定生态风险的评估。

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