NDLI: Reductive acid leaching of cadmium from zinc neutral leaching residue using hydrazine sulfate

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Reductive acid leaching of cadmium from zinc neutral leaching residue using hydrazine sulfate

Content Provider	Semantic Scholar
Author	Zhang, Chun Min, Xiaobo Zhang, Jianqiang Wang, Mi Rui Zhou, Bosheng Shen, Chen
Copyright Year	2015
Abstract	Abstract Zinc neutral leaching residue (ZNLR) from hydrometallurgical zinc smelting processing can be determined as hazardous intermediate containing considerable amounts of Cd and Zn which have great threats to the environment. The ZNLR contained approximately 35.99% Zn, 15.93% Fe and 0.26% Cd, and Cd mainly existed as ferrites in the ZNLR in this research. Reductive acid leaching of ZNLR was investigated. The effects of hydrazine sulfate concentration, initial sulfuric acid concentration, temperature, duration and liquid-to-solid ratio on the extraction of Cd, Zn and Fe were examined. The extraction efficiencies of Cd, Zn and Fe reached 90.81%, 95.83% and 94.19%, respectively when the leaching parameters were fixed as follows: hydrazine sulfate concentration, 33.3 g/L; sulfuric acid concentration, 80 g/L; temperature, 95 °C; duration of leaching, 120 min; liquid-to-solid ratio, 10 mL/g and agitation, 400 r/min. XRD and SEM-EDS analyses of the leaching residue confirmed that lead sulfate (PbSO 4 ) and hydrazinium zinc sulfate((N 2 H 5 ) 2 Zn(SO 4 ) 2 ) were the main phases remaining in the reductive leaching residue.
Starting Page	4175
Ending Page	4182
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1016/S1003-6326(15)64068-7
Alternate Webpage(s)	http://www.tnmsc.cn/down/2015/12_en/38-p4175.pdf
Alternate Webpage(s)	https://doi.org/10.1016/S1003-6326%2815%2964068-7
Volume Number	25
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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