Institute of Minerals and Materials Technology (CSIR), Bhubaneswar 751 013, Odisha, India.
Waste Manag. 2012 Mar;32(3):575-83. doi: 10.1016/j.wasman.2011.11.001. Epub 2011 Nov 25.
The global crisis of the hazardous electronic waste (E-waste) is on the rise due to increasing usage and disposal of electronic devices. A process was developed to treat E-waste in an environmentally benign process. The process consisted of thermal plasma treatment followed by recovery of metal values through mineral acid leaching. In the thermal process, the E-waste was melted to recover the metal values as a metallic mixture. The metallic mixture was subjected to acid leaching in presence of depolarizer. The leached liquor mainly contained copper as the other elements like Al and Fe were mostly in alloy form as per the XRD and phase diagram studies. Response surface model was used to optimize the conditions for leaching. More than 90% leaching efficiency at room temperature was observed for Cu, Ni and Co with HCl as the solvent, whereas Fe and Al showed less than 40% efficiency.
由于电子设备的使用和处置日益增加，全球危险电子废物（电子废物）危机正在加剧。开发了一种在环境友好的过程中处理电子废物的方法。该过程包括热等离子体处理，然后通过矿物酸浸出回收金属值。在热过程中，电子废物被熔化以回收金属值作为金属混合物。将金属混合物在去极化剂存在下进行酸浸。根据 XRD 和相图研究，浸出液主要含有铜，而其他元素如 Al 和 Fe 主要以合金形式存在。使用响应面模型优化浸出条件。使用 HCl 作为溶剂，在室温下观察到 Cu、Ni 和 Co 的浸出效率超过 90%，而 Fe 和 Al 的效率低于 40%。
