文献类型：期刊文献

英文题名：Multi-scale analysis of acidophilic microbial consortium biofilm's tolerance of lithium and cobalt ions in bioleaching

作者：Shi, Hongjie[1];Mao, Xingshun[1];Yang, Fan[1];Zhu, Minglong[1];Tan, Ningjie[1];Tan, Wensong[1];Gu, Tingyue[2];Zhang, Xu[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Ohio Univ, Edison Biotechnol Inst, Dept Chem & Biomol Engn, Athens, OH 45701 USA

年份：2024

卷号：474

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20242316201779);WOS:【SCI-EXPANDED(收录号:WOS:001249251700002)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 21878083) and the Open Project Funding of the State Key Laboratory of Bioreactor Engineering of China.

语种：英文

外文关键词：Acidophilic biofilm community; Microbial diversity; Metal ions stress; Electrochemistry; Lithium-ion battery bioleaching

摘要：Metal ions stress will inhibit the oxidation capacity of iron and sulfur of an acidophilic microbial consortium (AMC), which leads to reduced bioleaching efficiency. This work explored the impacts of Li + and Co 2 + on the composition and function of AMC biofilms with a multi-scale approach. At the reactor scale, the results indicated that the oxidative activity, the adsorption capacity, and the biofilm formation ability of AMC on pyrite surfaces decreased under 500 mM Li + and 500 mM Co 2 + . At the biofilm scale, the electrochemical measurements showed that Li + and Co 2 + inhibited the charge transfer between the pyrite working electrode and the biofilm, and decreased the corrosion current density of the pyrite working electrode. At the cell scale, the content of proteins in extracellular polymers substrate (EPS) increased as the concentrations of metal ions increased. Moreover, the adsorption capacity of EPS for Li + and Co 2 + increased. At the microbial consortium scale, a BugBase phenotype analysis showed that under 500 mM Li + and 500 mM Co 2 + , the antioxidant stress capacity and the content of mobile gene elements in AMC increased. The results in this work can provide useful data and theoretical support for the regulation strategy of the bioleaching of spent lithium-ion batteries to recover valuable metals.