Abstract Waste printed circuit boards (WPCBs) are considered as the most complicated and valuable component among e-waste. Slurry electrolysis can separate and recover metals from the extremely complex WPCBs. To promote its industrial application, a 5000 mL scale experiment was conducted to confirm industrial feasibility. Those results showed that copper and total metal recovery rates were 94.5% and 75.2% under the optimized conditions (30 g/L WPCBs, 10 g/L CuSO4·5H2O, 30 g/L NaCl, 190 g/L H2SO4, 30 g/L H2O2, 298 K temperature, 250 r/min stirring speed, 300 A/m2 and 8 h). The copper purity was 92.9%, and SEM-EDS analyses indicated the main dendritic metals recovered were copper and lead. USEtox toxicity potential evaluation results demonstrated human toxicity and ecotoxicity of WPCBs sharply decreased after treatment. A cost analysis of this process indicated that the $ 1.0 cost was partially offset by the $ 1.9 return from 1 kg WPCBs. Thus, slurry electrolysis has a promising industrial future for e-waste recycling/utilization.

中文翻译：

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浆料电解法从废印刷电路板中分离回收金属的半规模实验

摘要 废印刷电路板（WPCB）被认为是电子垃圾中最复杂、最有价值的组成部分。浆料电解可以从极其复杂的 WPCB 中分离和回收金属。为了促进其工业应用，进行了 5000 mL 规模实验以确认工业可行性。结果表明，在优化条件（30 g/L WPCBs、10 g/L CuSO4·5H2O、30 g/L NaCl、190 g/L H2SO4、30 g/L）下，铜和总金属回收率分别为94.5%和75.2%。 L H2O2，298 K 温度，250 r/min 搅拌速度，300 A/m2 和 8 h)。铜纯度为 92.9%，SEM-EDS 分析表明回收的主要树枝状金属为铜和铅。USEtox 毒性潜力评估结果表明，WPCBs 的人体毒性和生态毒性在处理后急剧下降。对该过程的成本分析表明，1.0 美元的成本被 1 公斤 WPCB 的 1.9 美元回报部分抵消。因此，浆料电解在电子废物回收/利用方面具有广阔的工业前景。