کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
212065 462032 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extraction of rubidium from gold waste: Process optimization
ترجمه فارسی عنوان
استخراج روبیدیوم از زباله های طلای: بهینه سازی فرایند
کلمات کلیدی
روبیدیوم، زباله طلا، شستن اسید، کباب کردن نمک، اشباع آب
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• This study aims for extracting rubidium from gold waste using the acid washing-sulfation roasting-water leaching process.
• Final extraction efficiency in the optimized process using central composite design (CCD) method is around 88%.
• The results of the present work could provide a simple and effective way for the extraction of rubidium from gold waste.

The extraction of rubidium from gold waste from the Mouteh processing plant in Iran by a three-step process (acid washing, followed by salt roasting and water leaching) was optimized. The acid washing step for removal of impurities was found to be optimal at 85 °C and 5 h, using 5 M nitric acid. Factors effecting roasting operation were then optimized by a series of initial experiments, then using response surface methodology (RSM) based on a central composite design (CCD). Rb extraction of 90.95% was obtained with a mass ratio of GW/Na2SO4/CaCl2⋅ 2H2O of 1.00:0.11:0.45 at 910 °C for 30 min. Water leaching of the roasted mixture resulted in 97.14% Rb extraction under optimum conditions, viz. a liquid/solid ratio of 1.69 at 58.5 °C for 31.4 min. The proposed correlations using RSM showed good agreement with the experimental data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 151, January 2015, Pages 25–32
نویسندگان
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