,Systematic degradation mechanism and pathways analysis of the immobilized bacteria: Permeability an

• 作 者: Xinge Fu Huajun Wang Yu Bai Jianliang Xue Yu Gao Shugang Hu Tongtong Wu Jingkuan Sun
• 机 构: College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qing
• 出 处: 环境科学与技术
• 发表日期: 2020年4期
• 关键词: Immobilized bacteria Biodegradation Bioremediation Kinetics Molecular simulation

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,inteal 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.