Fluoride removal efficiencies and mechanism of schwertmannite from KMnO4/MnO2-Fe(II) processes

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	Fluoride removal efficiencies and mechanism of schwertmannite from KMnO4/MnO2-Fe(II) processes
	Zhu, Feng; Guo, Zhaobing; Hu, Xingyun
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020-10-05
卷号	397 页码:1-8
关键词	Fluoride Schwertmannite Manganese Surface groups
ISSN号	0304-3894
英文摘要	Fluoride has an adverse effect on both the environment and industrial production. In particular, wastewater from smelting systems containing high concentrations of fluoride is a major cause of fluoride pollution. Based on the characteristics of such wastewater, a targeted and integrated method for removal fluoride using schwertmannite is proposed. The schwertmannite, prepared from the oxidation of Fe(II) by KMnO4 (Ksw) and MnO2(Msw), effectively removed fluoride within 30 min under certain conditions. Under most experimental conditions, the removal efficiency of F ion by Ksw was always 13 % higher than that by Msw, which is attributed to the different concentrations of OH- and SO42- for ion exchange. The calculations showed that the chemical formulas of Ksw and Msw are Fe8O8(OH)(5.42 +/- 0.04)(SO4)(1.29 +/- 0.02) and Fe8O8(OH)(5.28 +/- 0.04)(SO4)(1.36 +/- 0.02), respectively. In the Ksw system, 0.70 mol of OH- and 0.30 mol of SO42- were released per mole of F ions sorbed; those released for the Msw system were 0.69 mol and 0.31, respectively. The results showed that OH- played a primary role in the ion exchange and the schwertmannite showed good practicability for actual industrial wastewater.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44941]
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	Zhu, Feng,Guo, Zhaobing,Hu, Xingyun. Fluoride removal efficiencies and mechanism of schwertmannite from KMnO4/MnO2-Fe(II) processes[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,397:1-8.
APA	Zhu, Feng,Guo, Zhaobing,&Hu, Xingyun.(2020).Fluoride removal efficiencies and mechanism of schwertmannite from KMnO4/MnO2-Fe(II) processes.JOURNAL OF HAZARDOUS MATERIALS,397,1-8.
MLA	Zhu, Feng,et al."Fluoride removal efficiencies and mechanism of schwertmannite from KMnO4/MnO2-Fe(II) processes".JOURNAL OF HAZARDOUS MATERIALS 397(2020):1-8.