Manikkampatty Murugesan Palanisamy, K. Kandasamy, Venkata Myneni Ratnam
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引用次数: 3
摘要
科技的快速发展在人类生活中扮演着不可避免的角色。在电子垃圾的产生方面也有很大的限制。电子垃圾具有巨大的环境和健康影响，其中一个主要贡献者是印刷电路板(pcb)。以王水为浸出剂，分两阶段(第一阶段HCl和HNO3，第二阶段HCl和H2SO4)回收多氯联苯中的重金属。采用响应面法(RSM)确定重金属离子的最佳回收条件为:时间5 h，矿浆密度25 gm L-1，温度90.10℃，最佳回收率为0.761。优化后的回收率最高，Cu (97.06%)， Sn (94.66%)， Zn (96.64%)， Pb(96.89%)。edx用于分析处理前后样品的金属浓度。
Two phase leaching for metal recovery from waste printed circuit boards: Statistical optimization
The rapid growth of technology plays an inevitable role in humankind?s life and has a significant stint in the generation of e-waste. The electronic waste possess tremendous environmental and health effects and one such major contributor to it is printed circuit boards (PCBs). The present work deals with the recovery of heavy metals from PCBs by using aqua regia as leaching reagent by two stages (first stage HCl and HNO3 and second stage HCl and H2SO4). The studies carried by Response surface methodology (RSM) to determine the optimal conditions of recovery for the heavy metal ions showed that time 5 hrs, pulp density 25 gm L-1, and temperature 90.10C with desirability 0.761. These optimized values provide maximum recovery rate of Cu (97.06%), Sn (94.66%), Zn (96.64%) and Pb (96.89%) respectively. EDXs is used to analyze the metal concentrations of the sample before and after treatment.
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