کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5757160 1622629 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Recovery of gold from waste electrical and electronic equipment (WEEE) using ammonium persulfate
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Recovery of gold from waste electrical and electronic equipment (WEEE) using ammonium persulfate
چکیده انگلیسی
This paper presents a novel methodology to recover gold from waste electrical and electronic equipment (WEEE) using ammonium persulfate ((NH4)2S2O8). Gold was recovered as a fine coating using substrate oxidation without shredding or grinding process. The WEEE sample was characterized giving values of Au: 1.05 g/kg, Fe: 86.00 g/kg, Ni: 73.64 g/kg, Cu: 26.65 g/kg. The effect of (NH4)2S2O8 concentration (0.22-1.10 M), oxygen (0.0-1.4 L/min) and L/S ratio (10-30 mL/g) on the main responses (substrate oxidation and Au recovery) was investigated implementing response surface methodology with numerical optimization. A quadratic model was developed and quantities greater than 98% of Au were recovered. The findings presented suggest that, optimized quantities of ammonium persulfate in aqueous highly oxygenated media could be used to extract superficial gold from WEEE.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 57, November 2016, Pages 113-120
نویسندگان
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