Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5144376 | Ultrasonics Sonochemistry | 2018 | 28 Pages |
Abstract
The in situ leaching process of China's unique ion-adsorption rare earth ores has caused severe environmental damages due to the use of (NH4)2SO4 solution. This study reports that magnesium sulfate (MgSO4) as a leaching agent would replace (NH4)2SO4 by ultrasonically assisted leaching to deal with the ammonia-nitrogen pollution problem and enhance leaching process. At leaching conditions of 3Â wt% MgSO4 concentration, 3:1Â L/S ratio and 30Â min, the total rare earth leaching efficiency reaches 75.5%. Ultrasound-assisted leaching experiments show that the leaching efficiency of rare earths is substantially increased by introducing ultrasound, and nearly completely leached out after two stage leaching process. Thus, ultrasonic-assisted leaching process with MgSO4 is not only effective but also environmentally friendly, and beneficial to leach rare earths at laboratory scale.
Keywords
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Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Shaohua Yin, Jiannan Pei, Feng Jiang, Shiwei Li, Jinhui Peng, Libo Zhang, Shaohua Ju, Chandrasekar Srinivasakannan,