Assessment of gold and silver in assorted mobile phone printed circuit boards (PCBs): Original article

IF 7.1 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Waste management Pub Date : 2015-11-01 DOI:10.1016/j.wasman.2015.06.002

M.C. Vats, S.K. Singh

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引用次数: 87

Abstract

Demand for gold and silver has been escalating with increasing usage of electronic equipment globally. Around 267.3 MT of gold and 7275 MT of silver are being consumed annually for manufacturing mobile phones, laptops and other electronic equipment. However, only 15% is recuperated from these equipment; the remainder lies in the storage yards or landfills. The waste comprise glass, plastics, wires, batteries, PCBs, metal casing, etc. The PCB is composed of precious metals, which creates immense purpose for recycling and recovery. This paper characterises and assesses the recoverable metallic fraction of gold and silver from PCBs of mobile phones. The methodology is based on dismantling of the mobile handset and subjecting the PCBs to roasting and acid digestion. The digested samples were analysed by atomic absorption spectroscopy and the content of gold and silver in the PCBs was to be found in the range of 0.009–0.017% and 0.25–0.79% by weight respectively.

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对各种手机印刷电路板(pcb)中金银的评估:原文

随着全球电子设备使用量的增加，对黄金和白银的需求也在不断上升。每年约有267.3吨黄金和7275吨白银被用于制造手机、笔记本电脑和其他电子设备。然而，只有15%从这些设备中回收;其余的则堆放在堆场或垃圾填埋场。废物包括玻璃、塑料、电线、电池、多氯联苯、金属外壳等。PCB是由贵金属组成的，这为回收和回收创造了巨大的目的。本文对手机多氯联苯中可回收金、银的金属组分进行了表征和评价。该方法是基于拆卸移动电话和使多氯联苯烘烤和酸消化。经原子吸收光谱分析，多氯联苯中金、银的含量分别在0.009 ~ 0.017%和0.25 ~ 0.79%之间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Waste management 环境科学-工程：环境

CiteScore

15.60

自引率

6.20%

发文量

492

审稿时长

39 days

期刊介绍： Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)