Evaluation of cold filter cake leaching using green deepeutectic solvent choline chloride-malonic acid
Publish place: 3rd International Conference and 7th National Conference on Materials, Metallurgy & Mining
Publish Year: 1402
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
MCONF07_112
تاریخ نمایه سازی: 19 فروردین 1403
Abstract:
Nickel and cadmium are removed as cold filter cake (CFC) by zinc powder in the zinchydrometallurgical process. Besides environmental issues, this filter cake also has economic value, andsome research has been conducted to recycle metals through leaching using aqueous solutions. On theother hand, deep eutectic solvents (DESs) are a class of new solvents with good compatibility andbiodegradability that have been used for dissolving various metals. In this study, the ability of cholinechloride-malonic acid DES was investigated for leaching CFC. The used filter cake contained ۲۳.۸%zinc, ۷.۷% nickel, and ۱۱.۸% cadmium. Choline chloride-malonic acid had high dissolution for all threeelements: zinc, nickel, and cadmium, and almost all of them completely dissolved. Therefore, thissolvent can be suitable for the cumulative dissolution of zinc, nickel, and cadmium metals with adissolution efficiency of over ۹۰% in a DES to CFC ratio of ۵۰. There is no considerable change in Zn,Ni, and Cd leaching efficiencies when the DES to CFC ratio is decreased from ۵۰ to ۵. However, as theDES to CFC ratio decreased to ۲.۵, the dissolution of elements decreased significantly. It can beconcluded that ChCl-Ma DES can act as a suitable solvent for the cumulative leaching of Zn, Ni, andCd from CFC
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Authors
Bahram Behnajady
Assistant professor, Research Centre of Advanced Materials, Faculty of Materials Engineering, SahandUniversity of Technology
Matin Najafi
Bachelor of Science, Sahand University of Technology