Huang Yaohua, Zhan Hui, Bhatt Pankaj, Chen Shaohua
State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Integrative Microbiology Research Centre, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China.
Front Microbiol. 2019 Aug 2;10:1754. doi: 10.3389/fmicb.2019.01754. eCollection 2019.
Paraquat herbicide has served over five decades to control annual and perennial weeds. Despite agricultural benefits, its toxicity to terrestrial and aquatic environments raises serious concerns. Paraquat cannot rapidly degrade in the environment and is adsorbed in clay lattices that require urgent environmental remediation. Advanced oxidation processes (AOPs) and bioaugmentation techniques have been developed for this purpose. Among various techniques, bioremediation is a cost-effective and eco-friendly approach for pesticide-polluted soils. Though several paraquat-degrading microorganisms have been isolated and characterized, studies about degradation pathways, related functional enzymes and genes are indispensable. This review encircles paraquat removal from contaminated environments through adsorption, photocatalyst degradation, AOPs and microbial degradation. To provide in-depth knowledge, the potential role of paraquat degrading microorganisms in contaminated environments is described as well.
百草枯除草剂已用于控制一年生和多年生杂草五十多年。尽管具有农业效益，但其对陆地和水生环境的毒性引发了严重关注。百草枯在环境中不能迅速降解，且会吸附在粘土晶格中，这需要紧急的环境修复。为此已开发了高级氧化工艺（AOPs）和生物强化技术。在各种技术中，生物修复是一种用于农药污染土壤的经济高效且环保的方法。尽管已经分离并鉴定了几种降解百草枯的微生物，但关于降解途径、相关功能酶和基因的研究必不可少。本综述围绕通过吸附、光催化剂降解、AOPs和微生物降解从污染环境中去除百草枯展开。为了提供深入的知识，还描述了降解百草枯的微生物在污染环境中的潜在作用。
