Research status and prospect of solidification/stabilization of Mn and NH3-N from electrolytic manganese residue
MU Wei-hong1, ZHOU Xin-tao1, HUANG Jing2, HE Sen1, LUO Zhong-qiu1,3, MA Yue1, WANG Lu-xing1, SHAO Zhou-jun1
1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China; 2. Xichang University, Xichang 615000, China; 3. The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, China
Abstract: The effects and mechanism of solidifying/stabilizing electrolytic manganese residue (EMR) by alkaline materials and chemically bonded phosphate ceramics (CBPCs) are elaborately reviewed.Although traditional alkaline materials can effectively stabilize/solidify heavy metal ions in EMR,the physicochemical properties of the treated EMR specimens are not very stable due to that the structure of the solidified specimens is easily destroyed by carbonization,leaving hidden risk of secondary pollution.While the solidification/stabilization of Mn and NH3-N by CBPCs also has some weakness such as poor operability and high cost for reaction material MgO.Replacing pure MgO with ferronickel slag or copper slag rich in metal oxides (MgO,FeOx) can reduce the cost of treating materials and remarkably improve operability,also achieve effective treatment to EMR by the synergistic functions of chemical bonding,physical packaging and adsorption.This method can provide a research idea for treatment of EMR.
母维宏, 周新涛, 黄静, 和森, 罗中秋, 马越, 王路星, 邵周军. 电解锰渣中Mn和NH3-N固化/稳定化处理研究现状及展望[J]. 现代化工, 2020, 40(4): 17-21.
MU Wei-hong, ZHOU Xin-tao, HUANG Jing, HE Sen, LUO Zhong-qiu, MA Yue, WANG Lu-xing, SHAO Zhou-jun. Research status and prospect of solidification/stabilization of Mn and NH3-N from electrolytic manganese residue. Modern Chemical Industry, 2020, 40(4): 17-21.
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