|
|
Iranian Journal of Chemistry and Chemical Engineering، جلد ۳۹، شماره ۳، صفحات ۲۱۳-۲۲۹
|
|
|
| عنوان فارسی |
|
|
| چکیده فارسی مقاله |
|
|
| کلیدواژه‌های فارسی مقاله |
|
|
| عنوان انگلیسی |
Comparison of Adsorption Properties of Activated Carbons with Different Crops Residues as Precursors for Gold Cyanide Recovery: An Iranian Gold Industry Guide |
|
| چکیده انگلیسی مقاله |
Adsorption of gold cyanide on three types of Activated Carbons (ACs) has been investigated in batch and column adsorption conditions. Applied ACs have been derived from different crops precursors i.e., coconut shell (CAC), peach stone (PAC), and walnut shell (WAC). As peach stone and walnut shells are abundant agricultural residues in Iran, the activated carbons produced from these precursors are economically preferable for the gold recovery process. The ACs were characterized using FTIR, SEM, BET, and Wet-Bed Compaction Hardness analyses. Batch equilibrium adsorption data were analyzed using the Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherm models. Freundlich isotherm was in better agreement with the equilibrium data and the maximum adsorption capacity (40.8 mg/g) was tabulated for CAC. Adsorption kinetics was also modeled using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The PAC recorded the highest removal rate in the light of better agreement of the pseudo-second-order model. Fixed-bed column experiments were carried out at different initial gold concentrations (30, 50 mg/L) to determine the characteristics of the breakthrough curves. The maximum bed capacity (37.55 mg/g) was obtained for CAC. Three dynamic adsorption models including, Thomas, Yoon–Nelson, and Adam–Bohart,were applied to describe the breakthrough curves. Both Thomas and Yoon–Nelson models were in appropriate agreement with the experimental column adsorption data. This research introduces peach stone as a promising precursor considering availability, technical features, and economical aspects for the production of AC for gold recovery from cyanide leach solutions. Results are also conducive for gold mining industries to select the appropriate activated carbon. |
|
| کلیدواژه‌های انگلیسی مقاله |
Adsorption,Pregnant liquor,Gold cyanide,Fixed-bed column,Breakthrough curves |
|
| نویسندگان مقاله |
Ehsan Salehi |
Department of Chemical Engineering, Faculty of Engineering, Arak University,
P.O. Box 38156-8-8349 Arak, I.R. IRAN
Majid Yarali |
Department of Chemical Engineering, Faculty of Engineering, Arak University,
P.O. Box 38156-8-8349 Arak, I.R. IRAN
Abtin Ebadi Amooghin |
Department of Chemical Engineering, Faculty of Engineering, Arak University,
P.O. Box 38156-8-8349 Arak, I.R. IRAN
|
|
| نشانی اینترنتی |
https://ijcce.ac.ir/article_34299_ff2e2abc4fe54c9634ed11c9679428ea.pdf |
| فایل مقاله |
فایلی برای مقاله ذخیره نشده است |
| کد مقاله (doi) |
|
| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
|
| نوع مقاله منتشر شده |
|
|
|
|
برگشت به:
صفحه اول پایگاه |
نسخه مرتبط |
نشریه مرتبط |
فهرست نشریات
|