Systematic degradation mechanism and pathways analysis of the immobilized bacteria:Permeability and biodegradation,kinetic and molecular simulation  

作　　者：Xinge Fu Huajun Wang Yu Bai Jianliang Xue Yu Gao Shugang Hu Tongtong Wu Jingkuan Sun 

机构地区：[1]College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao,Shandong,266590,China [2]College of Chemical Engineering and Environment,China University of Petroleum,Changping,Beijing,102249,China [3]China Unicom System Integration Co.,Ltd,No.131,Xidan North Road,Beijing,100085,China [4]Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta(Binzhou University),Binzhou,256600,China

出　　处：《Environmental Science and Ecotechnology》2020年第2期57-63,共7页环境科学与生态技术（英文）

基　　金：supported by the scientific research fund project of the National Natural Science Foundation of China(grant numbers 51408347);the SDUST Graduate Technology Innovation Project(SDKDYC190321);the Major Science and Technology Innovation Projects in Shandong Province(2019JZZY020808);the Open Research Fund Program of Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta(Binzhou University)(2019KFJJ02).

摘　　要：In order to effectively improve the degradation rate of diesel,a systematic analysis of the degradation mechanism used by immobilized bacteria is necessary.In the present study,diesel degradation mechanisms were assessed by analyzing permeability,biodegradation,adsorption kinetics,and molecular simulation.We found that bacteria immobilized on cinnamon shells and peanut shells degraded relatively high amounts of diesel(69.94%and 64.41%,respectively).The primary degradation pathways used by immobilized bacteria included surface adsorption,internal uptake,and biodegradation.Surface adsorption was dominant in the early stage of degradation,whereas biodegradation was dominant in later stages.The diesel adsorption rate of the immobilized bacteria was in agreement with the pseudo second-order kinetic model.The immobilized bacteria and diesel interacted through hydrogen bonds.

关 键 词：Immobilized bacteria BIODEGRADATION BIOREMEDIATION KINETICS Molecular simulation 

分 类 号：O64[理学—物理化学]