کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6658999 | 1425528 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of zinc ion on copper speciation and adsorption on activated carbon
ترجمه فارسی عنوان
اثر یون روی بر خصوصی سازی و جذب مس در کربن فعال
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کلمات کلیدی
بازیابی سیانید، جذب، کربن فعال، خاصیت، سیانکومپلکس مس،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
This paper describes the effect of zinc ions on copper speciation and adsorption on activated carbon in solutions with varied cyanide levels and containing calcium. Batch and column adsorption experiments were carried out under atmospheric conditions at different levels of CN/Cu using two types of activated carbon. Raman analysis shows that CN/Cu molar ratio, ionic strength (by adding calcium ions to the solution), and zinc ions can be used to control copper speciation in cyanide solutions. The addition of Zn2Â + to cyanide solutions causes the conversion of CNâ and Cu(CN)43Â â species to Cu(CN)32Â â, and the concomitant formation of Zn(CN)42Â â, regardless of cyanide concentration and ionic strength. As Cu(CN)32Â â has a high affinity for the solid surface, copper adsorption was favored. The co-addition of Ca2Â + to the solutions produces an even larger enhancement of copper adsorption on activated carbon and has no effect on zinc adsorption. Column experiments show a significant reduction in the volume of cyanide solution to be further treated and an important increase in the concentration of copper. These findings may aid in the design of copper and cyanide recovery strategies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 176, March 2018, Pages 78-86
Journal: Hydrometallurgy - Volume 176, March 2018, Pages 78-86
نویسندگان
Souza C., Majuste D., Dantas M.S.S., Ciminelli V.S.T.,