大连理工大学学报2026，Vol.66Issue(3)：221-230,10.DOI:10.7511/dllgxb202603001
信号分子对活性污泥降解多环芳烃影响及群落解析
Effect of signaling molecules on degradation of polycyclic aromatic hydrocarbons in activated sludge and community analysis
摘要
Abstract
Signaling molecules are extensively employed in the environmental field.While traditional signaling molecules have been shown to promote the degradation of polycyclic aromatic hydrocarbons(PAHs)by single bacterial strains,their effects on complex communities remain unknown.The traditional signaling molecule acyl homoserine lactone(AHL)and the novel signaling molecule indole are separately added to activated sludge microcosms to explore the effects of signaling molecules on the degradation of PAHs by activated sludge.The results indicate that signaling molecules can enhance the degradation rate of PAHs.After stimulation by signaling molecules,the hydrophobicity of the cell surface of activated sludge,the content of extracellular polymeric substances(EPS),and the ratio of protein to polysaccharide in EPS all increase,while the downstream PAHs-degrading enzyme activities are simultaneously enhanced,all of which are conducive to improving the bioavailability of PAHs.High-throughput sequencing results reveal an increased abundance of bacteria capable of degrading PAHs within the community,particularly those regulated by signaling molecules,such as Alicycliphilus and Hydrogenophaga,which become predominant.The research results offer novel insights and theoretical guidance for the application of quorum sensing(QS)signaling molecules in regulating PAHs degradation.关键词
群体感应/信号分子/多环芳烃/生物降解/活性污泥群落Key words
quorum sensing/signaling molecules/polycyclic aromatic hydrocarbons/biodegradation/activated sludge community分类
资源环境引用本文复制引用
郭鑫宇,荆佳维,李川,王婷婷,黄鹏斐,曲媛媛..信号分子对活性污泥降解多环芳烃影响及群落解析[J].大连理工大学学报,2026,66(3):221-230,10.基金项目
国家自然科学基金资助项目(31970107). （31970107）
