A perspective of stepwise utilization of hazardous zinc plant purification residue based on selective alkaline leaching of zinc

doi:10.1016/j.jhazmat.2020.122090

	A perspective of stepwise utilization of hazardous zinc plant purification residue based on selective alkaline leaching of zinc
	Huang, Yukun 1; Geng, Yangbo 1; Han, Guihong 1; Cao, Yijun 1; Peng, Weijun 1; Zhu, Xiaofeng 2; Zhang, Ting-an 3; Dou, Zhihe 3
刊名	Journal of Hazardous Materials
	2020-05-05
卷号	389
关键词	Alkalinity Cadmium Cadmium compounds Hazards II-VI semiconductors Morphology Oxide minerals Precipitation (chemical) Purification Sodium hydroxide Sulfur compounds Thermoanalysis Zinc oxide Zinc sulfide Alkaline leaching Eh-pH diagrams Hexagonal wurtzite structure Photocatalytic property Precipitation methods Selective recovery Thermo dynamic analysis Zincate
ISSN号	03043894
DOI	10.1016/j.jhazmat.2020.122090
英文摘要	A new route for selective recovery of zinc from hazardous zinc plant purification residue was proposed by alkaline leaching process. The thermodynamic analysis revealed that by controlling solution pH in the range from 14.30 to 16.78 at 25 °C, basic zinc sulfate can be converted to ZnO22− instead of Zn(OH)2, while Cd will enter into alkaline leaching residue as a hydroxide. It is feasible to leach selectively Zn and to separate it with Cd by alkaline leaching, and the experimental results confirm that. Under the conditions of NaOH concentration of 3 mol/L, L/S of 20 ml/g, temperature of 40 °C, and time of 50 min, LR of Zn reached 96.14% while them of Pb and Cd were only 0.66% and 2.83% respectively. ZnO with hexagonal wurtzite structure and Cd(OH)2 were the main phases of leaching residue. They crystallized and adhered to the surface of leaching residue particles, which result in the loose and random particle morphology. The findings confirm that alkaline leaching is efficient in separation of Zn and Cd in ZPPR. In addition, nano-ZnO with flowerlike was synthesized with the zinc-rich leaching solution by precipitation method and the its photocatalytic property was similar to that of nano-ZnO purchased. © 2020 Elsevier B.V.
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000524479100097
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115607]
专题	材料科学与工程学院
作者单位	1.School of Chemical Engineering, Zhengzhou University, Zhengzhou; 450001, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals & School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Laboratory of Special Metallurgy and Process Engineering, School of Metallurgy, Northeastern University, Shenyang; 110819, China
推荐引用方式 GB/T 7714	Huang, Yukun,Geng, Yangbo,Han, Guihong,et al. A perspective of stepwise utilization of hazardous zinc plant purification residue based on selective alkaline leaching of zinc[J]. Journal of Hazardous Materials,2020,389.
APA	Huang, Yukun.,Geng, Yangbo.,Han, Guihong.,Cao, Yijun.,Peng, Weijun.,...&Dou, Zhihe.(2020).A perspective of stepwise utilization of hazardous zinc plant purification residue based on selective alkaline leaching of zinc.Journal of Hazardous Materials,389.
MLA	Huang, Yukun,et al."A perspective of stepwise utilization of hazardous zinc plant purification residue based on selective alkaline leaching of zinc".Journal of Hazardous Materials 389(2020).