Bioleaching of Gold and Silver from Waste Printed Circuit Boards by Pseudomonas balearica SAE1 Isolated from an e-Waste Recycling Facility
Bioleaching of Gold and Silver from Waste Printed Circuit Boards by Pseudomonas balearica SAE1 Isolated from an e-Waste Recycling Facility
复制标题
DOI：
10.1007/s00284-017-1365-0
复制
发表时间：
2018-02-01
影响因子：
2.6
通讯作者：
Kumar, Sudhir
中科院分区：
文献类型：
--
作者：
Kumar, Anil;Saini, Harvinder Singh;Kumar, Sudhir
耐电子垃圾毒性的本地细菌菌株balearica假单胞菌SAE1从印度的电子垃圾回收设施Exigo recycling pst . Ltd.中分离出来。采用粉碎后（粒径为150 A μ m）的废弃计算机印刷电路板(pcb)/ L培养基对菌株进行毒性耐受性分析。SAE1的EC50值为325.7 g/L。然后采用两步生物浸出法从电子垃圾中实现金（Au）和银（Ag）的溶解。为了最大限度地提高贵金属的溶出度，对矿浆密度、甘氨酸浓度、pH值和温度等因素进行了优化。在pH = 9.0、矿浆密度为10 g/L、温度为30℃、甘氨酸浓度为5 g/L的条件下，Au和Ag的溶出率分别为68.5%和33.8%。这是利用本地电子废物细菌进行金和银生物浸出及其分析以确定电子废物毒性耐受性的第一次研究。
Indigenous bacterial strain Pseudomonas balearica SAE1, tolerant to e-waste toxicity was isolated from an e-waste recycling facility Exigo Recycling Pvt. Ltd., India. Toxicity tolerance of bacterial strain was analyzed using crushed (particle size a150 A mu m) waste computer printed circuit boards (PCBs)/liter (L) of culture medium. The EC50 value for SAE1 was 325.7 g/L of the e-waste pulp density. Two-step bioleaching was then applied to achieve the dissolution of gold (Au) and silver (Ag) from the e-waste. To maximize precious metal dissolution, factors including pulp density, glycine concentration, pH level, and temperature were optimized. The optimization resulted in 68.5 and 33.8% of Au and Ag dissolution, respectively, at a pH of 9.0, a pulp density of 10 g/L, a temperature of 30 A degrees C, and a glycine concentration of 5 g/L. This is the first study of Au and Ag bioleaching using indigenous e-waste bacteria and its analysis to determine e-waste toxicity tolerance.