کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10377761 | 880743 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Recovery of gold from gold slag by wood shaving fly ash
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
Wood shaving fly ash was used as an alternative adsorbent for gold preconcentration from gold slag. The maximum gold adsorption capacity of wood shaving fly ash washed with tap water (WSFW) at 20, 30, 40, and 60â°C was 8.68, 7.79, 7.44, and 7.25 mgAu/gadsorbent, respectively, while of activated carbon it was 76.78, 60.95, 56.13, and 51.90 mgAu/gadsorbent, respectively. Deionized water at 100â°C could elute gold adsorbed onto WSFW to 71%. The effect of the increasing temperature of water, 30, 60, and 100â°C, implied that the adsorption mechanism was mainly physical adsorption. The negative values of enthalpy change (ÎH) and free energy change (ÎG) indicated an exothermic and spontaneous process, respectively. The positive values of entropy change (ÎS) indicated increasing disorder of the system. The advantages of wood shaving fly ash are the purification of gold and the easier recycling of gold from the gold-adsorbed adsorbent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 287, Issue 2, 15 July 2005, Pages 394-400
Journal: Journal of Colloid and Interface Science - Volume 287, Issue 2, 15 July 2005, Pages 394-400
نویسندگان
Amphol Aworn, Paitip Thiravetyan, Woranan Nakbanpote,