摘要
多环芳烃(PAHs)的K_(ow)值一般大于10^(4),在水中的溶解度极小,具有生物毒性和生物积累性,是一种难被降解,尤其在缺氧环境中寿命显著增长的持久性有机污染物。自然环境中的厌氧微生物能够与周围环境中电子受体组成复杂的生物代谢网络,是彻底去除PAHs污染的有效措施,但针对高效降解PAHs的功能微生物的研究相对较少,对参与代谢的关键功能酶和基因的研究较为缺乏。文章从PAHs厌氧代谢网络的微生物组成出发,对不同厌氧反应体系中PAHs的降解路径、参与降解的关键功能酶和编码基因进行系统性的综述,并对高分子PAHs的厌氧生物降解领域未来的研究方向进行了展望,以期为PAHs的厌氧生物强化技术提供一定的理论参考和技术指导。
PAHs(polycyclic aromatic hydrocarbons),with high bioaccumulation,ecotoxicity and extremely low solubility(K_(ow)>10^(4)),is a kind of refractory and persistent organic pollutants which,especially in anaerobic setting,their lifespan can be lengthened.However,anaerobic microorganisms can establish complex metabolism network with various electron accepters in natural environment,which is considered as the main measure to effectively remove PAHs.On account of that few researches have been focused on the pure culture with higher degradation performance of PAHs,let alone the functional enzymes and coded genes,this paper,on the basis of the composition of microorganisms in PAHs'anaerobic metabolism network,systemically reviews the biodegradation pathway,functional enzymes and corresponding coded genes related to PAHs biodegradation in different anaerobic reaction systems.In addition,the prospects of the research orientation in futrue regarding the anaerobic biodegradation of PAHs are also discussed.It is hoped to provide some references and theoretical guidance for enhancing the anaerobic biodegradation of PAHs.
作者
高于涵
贾亚婷
吕岳骏
王舒淇
蔡明娜
李鑫丰
卢静
GAO Yuhan;JIA Yating;LYU Yuejun;WANG Shuqi;CAI Mingna;LI Xinfeng;LU Jing(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2023年第5期67-75,共9页
Environmental Science & Technology
基金
自然科学面上项目(41977141)
国家重点研发计划(2018YFC1801100)。
关键词
厌氧反应体系
降解路径
功能酶和基因
PAHS
微生物
anaerobic reaction system
degradation pathways
functional enzymes and genes
polycyclic aromatic hydrocarbons
microorganism
