摘要
废弃印制电路板(waste printed circuit boards,WPCB)是电子废物的重要组成部分,具有高复杂性和高危害性。WPCB中含有铅、汞、砷等重金属和其他有毒物质,这些物质容易渗入土壤和地下水环境介质中积累,然后迁移到作物中,通过食物链进入生物体,损害人类生命和健康。传统处理方式如垃圾填埋或焚烧会产生大量污染物质。因此本研究从超低温处理模式角度出发,通过改变PCB自身力学性能和增加其脆性来降低处理难度并避免二次污染的发生。对于PCB中的金元素,本研究引入氯化浸提方式,通过使用次氯酸钠来提升浸提过程中的氧化电位,完成氯金酸钠的高效制备。
Waste printed circuit boards(WPCBs)are an important component of electronic waste,with high complexity and hazards.WPCB contains heavy metals such as lead,mercury,arsenic,and other toxic substances,which can easily infiltrate soil and groundwater environmental media and accumulate,then migrate to crops and enter organisms through the food chain,damaging human life and health.Traditional disposal methods such as landfill or incineration can generate a large amount of pollutants.Therefore,this study starts from the perspective of an ultra-low temperature treatment mode,reducing the difficulty of treatment and avoiding secondary pollution by changing the mechanical properties of PCB itself and increasing its brittleness.For the gold element in PCB,this study introduces the chlorination extraction method,which enhances the oxidation potential during the extraction process by using sodium hypochlorite to achieve efficient preparation of sodium chloroauricate.
作者
李宣延
张林楠
李蓬勃
李赫
高彤
LI Xuanyan;ZHANG Linnan;LI Pengbo;LI He;GAO Tong(Shenyang University of Technology,Shenyang Liaoning 110870,China)
出处
《辽宁化工》
2025年第9期1536-1541,共6页
Liaoning Chemical Industry
关键词
废弃电路板
超低温
资源化
氯化浸金
Abandoned circuit boards
Ultra low temperature
Resource utilization
Chlorinated gold leaching
