Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals

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	Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals
	Du, Bing; Hou, Deyin; Duan, Ning; Zhou, Changbo; Wang, Jun; Dan, Zhigang
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2015-05
卷号	22 期号:10 页码:7782-7793
关键词	Electrolytic manganese solid waste Soluble Mn(II) Immobilization Carbonates Oxidation Mechanism
英文摘要	Electrolytic manganese solid waste (EMSW) is a by-product of electrolytic manganese production and generally contains a high concentration of soluble Mn(II) (2000-3000 mg/L). Millions of tons of EMSW are stored in China, and the environmental pollution caused by manganese in this waste product is concerning. Unfortunately, little attention has been paid to the immobilization of manganese from industrial solid waste because manganese is absent from toxicological identification standards, and there is a lack of relevant quality standards in China. The objectives of this study were to immobilize soluble Mn(II) using chemical reagents, to analyze the immobilization mechanism, and to identify the most economical reagents. We investigated the immobilization degrees of soluble Mn(II) achieved by the reagents quicklime (CaO), carbonates (NaHCO3 and Na2CO3), phosphates (Na3PO4, Na2HPO4, NH4H2PO4, and Ca-10(PO4)(6)(OH)(2)), and caustic magnesia (MgO) both individually and in combination. Our results showed that the use of 9 % CaO+ 5 % NaHCO3, 9 % CaO+ 5 % Na3PO4, 10 % MgO alone, or with 1-5 % NaHCO3 or 1-5 % Na2CO3 can reduce the amount of Mn(II) leached to 100 mg/kg when the eluate pH was in the range of 6-9. The most economical reagent treatments were determined using K-means cluster analysis. Analysis of the immobilization mechanism showed that CaO + NaHCO3 may be favorable for immobilizing soluble Mn(II) as precipitation and oxidation products because the addition of NaHCO3 releases OH- and buffers the system.
研究领域[WOS]	Environmental Sciences
WOS记录号	WOS:000354486800055
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32788]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Du, Bing,Hou, Deyin,Duan, Ning,et al. Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2015,22(10):7782-7793.
APA	Du, Bing,Hou, Deyin,Duan, Ning,Zhou, Changbo,Wang, Jun,&Dan, Zhigang.(2015).Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,22(10),7782-7793.
MLA	Du, Bing,et al."Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 22.10(2015):7782-7793.