A Newly Acidophilic Bacterium Acidomyces acidothermus Was Isolated to Efficiently Bioleach Copper from Waste Printed Circuit Boards (WPCBs)

被引：7
|
作者：
Yin, Xiafei [1 ]
Shan, Xuan [1 ]
Liang, Guobin [1 ]
Zhou, Quanfa [2 ]
Lin, Wei [1 ,3 ]
机构：
[1] Jiangsu Univ Technol, Sch Resources & Environm Engn, Jiangsu Key Lab Ewaste Recycling, Changzhou 213001, Peoples R China
[2] Changzhou Inst Technol, Jiangsu Prov Engn Res Ctr Exserv PV Module Resourc, Changzhou 213032, Peoples R China
[3] Jiangsu Univ Technol, Sch Chem & Chem Engn, Changzhou 213001, Peoples R China
来源：
SUSTAINABILITY | 2023年 / 15卷 / 03期
关键词：
Acidomyces acidothermus; culture optimization; bioleaching mechanism; RESPONSE-SURFACE METHODOLOGY; OPTIMIZATION; BEHAVIOR; KINETICS;
D O I：
10.3390/su15032709
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
An acidophilic metal-resistant bacterial strain, Acidomyces acidothermus (A. acidothermus), was isolated and identified by morphology, physiology, biochemistry, and 16S rDNA. A. acidothermus culture conditions were optimized by response surface methodology (RSM). Results showed that with a temperature of 40 degrees C, a pH of 3 in a 9k medium, and a rotation speed of 140 r/min, the copper leaching rate reached the highest value of 39.8%. Furthermore, SEM images and a heatmap of differential metabolites indicated that A. acidothermus adsorbed on the surface of WPCBs and extracellular polymeric substances (EPS), mainly D-glucuronic acid, were secreted, suggesting the highly efficient mechanism of copper recovery from WPCBs.
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页数：17
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