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Recycling of Hazardous Jarosite Residues Based on Hydrothermal Crystal Transformation by Dongdong He; Feng Jiang; Xinzhuang Fu; Runqing Liu; Haisheng Han; Wei Sun; Zhen Niu; Tong Yue is a Environmental Science article available to read on EtoBox.

What is Recycling of Hazardous Jarosite Residues Based on Hydrothermal Crystal Transformation about?

Jarosite [MeFe 3 (SO 4 ) 2 (OH) 6 ] is a typical non-ferrous smelting slag produced in the process of iron removal from hydrometallurgical solution, which contains a large number of valuable and toxic metal elements. Treating the complex and hazardous jarosite residue in an economically and environmentally sound way has always been an urgent problem. A novel one-step hydrothermal treatment method was proposed in this paper for recycling of jarosite residues. It can be seen from the XRD and TEM results that jarosite residues could be completely transformed into hematite crystal particles under hydrothermal conditions at temperature above 220°C. Meanwhile, other valuable metal components (such as nickel sulfate hexahydrate) entrained in the residue will be dissolved in the aqueous solution, which can be reused in the hydrometallurgical process. Through phase composition analysis of the hydrothermal process, it is concluded that jarosite was firstly pyrolyzed to generate Fe 3+ . The obtained Fe 3+ was then hydrolyzed to Fe (OH) 3 , which was transformed into Fe 2 O 3 through dehydration condensation and directional arrangement. Further roasting the hematite particles, the obtained pro

Who reads Recycling of Hazardous Jarosite Residues Based on Hydrothermal Crystal Transformation?

Author

Dongdong He; Feng Jiang; Xinzhuang Fu; Runqing Liu; Haisheng Han; Wei Sun; Zhen Niu; Tong Yue

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)