کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4415842 1307761 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An electrogenerative process for the recovery of gold from cyanide solutions
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
An electrogenerative process for the recovery of gold from cyanide solutions
چکیده انگلیسی

Traditional methods for the recovery of gold from electronic scrap by hydrometallurgy were cyanidation followed by adsorption on activated carbon or cementation onto zinc dust and by electrowinning. In our studies, a static batch electrochemical reactor operating in an electrogenerative mode was used in gold recovery from cyanide solutions. A spontaneous chemical reaction will take place in the reactor and generate an external flow of current. In this present work, a static batch cell with an improved design using three-dimensional cathodes namely porous graphite and reticulated vitreous carbon (RVC) and two-dimensional cathode materials, copper and stainless steel plates were coupled with a zinc anode. The electrogenerative system was demonstrated and the performance of the system using various cathode materials for gold recovery was evaluated. The system resulted in more than 90% gold being recovered within 3 h of operation. Activated RVC serves as a superior cathode material having the highest recovery rate with more than 99% of gold being recovered in 1 h of operation. The morphology of gold deposits on various cathode materials was also investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 67, Issue 8, April 2007, Pages 1502–1510
نویسندگان
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