生物浸出
危险废物
废物管理
浸出(土壤学)
污染物
重金属
电子废弃物
印刷电路板
环境科学
污染
化学
环境化学
工程类
冶金
材料科学
生态学
电气工程
有机化学
铜
生物
土壤科学
土壤水分
作者
P.R. Yaashikaa,B. Priyanka,Pankaj Kumar,S. Karishma,S. Jeevanantham,Sravya Indraganti
出处
期刊:Chemosphere
[Elsevier]
日期:2022-01-01
卷期号:287: 132230-132230
被引量:66
标识
DOI:10.1016/j.chemosphere.2021.132230
摘要
This review is intent on the environmental pollution generated from printed circuit boards and the methods employed to retrieve valuable and hazardous metals present in the e-wastes. Printed circuit boards are the key components in the electronic devices and considered as huge e-pollutants in polluting our surroundings and the environment as a whole. Composing of toxic heavy metals, it causes serious health effects to the plants, animals and humans in the environment. A number of chemical, biological and physical approaches were carried out to recover the precious metals and to remove the hazardous metals from the environment. Chemical leaching is one of the conventional PCBs recycling methods which was carried out by using different organic solvents and chemicals. Need of high cost for execution, generation of secondary wastes in the conventional methods, forces to discover the advanced recycling methods such as hydrometallurgical, bio-metallurgical and bioleaching processes to retrieve the valuable metals generate through e-wastes. Among them, bioleaching process gain extra priority due to its higher efficiency of metal recovery from printed circuit boards. There are different classes of microorganisms have been utilized for precious metal recovery from the PCBs through bioleaching process such as chemolithoautotrophy, heterotrophy and different fungal species including Aspergillus sp. and Penicillium sp. The current status and scope for further studies in printed circuit boards recycling are discussed in this review.
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