Removal of fluorine from red mud (bauxite residue) by electrokinetics

被引：39

作者：

Zhu, Shufa ^{[1
]}

Zhu, Danyang ^{[2
]}

Wang, Xiaohan ^{[1
]}

机构：

[1] Henan Univ Sci & Technol, Chem Engn & Pharmaceut Sch, Luoyang 471023, Peoples R China

[2] Cent S Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2017年 / 242卷

基金：

中国国家自然科学基金;

关键词：

Red mud; Fluorine; Electrokinetic; Electroosmosis; Electromigration; CONTAMINATED CLAY SOILS; ENHANCED ELECTROKINETICS; ALUMINUM PRODUCTION; REMEDIATION; KAOLINITE; WASTE; CHINA;

D O I：

10.1016/j.electacta.2017.05.040

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The feasibility of the electrokinetic treatment for the removal of fluorine from the red mud was evaluated. Three electrokinetic experiments were conducted in a self-made electrokinetic apparatus with deionized water as electrolyte, and the potential gradient was set at 0.5, 1.0 and 1.5 V/cm respectively. The effects of the potential gradient on the removal of fluorine and the chemicophysical properties of the red mud were investigated. The results revealed that the fluorine content in the red mud decreased gradually and the red mud properties such as pH and electrical conductivity (EC) were significantly redistributed from the cathode to the anode regions after the electrokinetic treatment. Among the given potential gradients the removal rate of fluorine increased with the potential gradient. 1.5 V/cm had the highest removal rate 63.2% and 1.0 V/cm had very significant and steady electroosmotic flow (EOF). This research shows that the electrokinetic treatment is a novel technique that has high efficiency and promising application for the removal of fluorine from the red mud. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：300 / 306

页数：7

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