Adsorption of As(III) on porous hematite synthesized from goethite concentrate

被引：38

作者：

Yang, Xuetong ^{[1
,2
]}

Xia, Ling ^{[1
]}

Li, Jialei ^{[2
]}

Dai, Min ^{[2
,3
]}

Yang, Guangcheng ^{[2
]}

Song, Shaoxian ^{[1
]}

机构：

[1] Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China

[2] Wuhan Univ Technol, Sch Resources & Environm Engn, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China

[3] Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550,Loma 2a Secc, San Luis Potosi 78210, Slp, Mexico

来源：

CHEMOSPHERE | 2017年 / 169卷

基金：

中国国家自然科学基金;

关键词：

Goethite; Porous hematite; As(III) adsorption; Calcination; Surface area; ARSENIC REMOVAL; AQUEOUS-SOLUTION; NATURAL SIDERITE; LEPIDOCROCITE; FERRIHYDRITE; EQUILIBRIUM; MAGNETITE; KINETICS; MOBILITY; SORPTION;

D O I：

10.1016/j.chemosphere.2016.11.061

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Arsenite (As(III)) is toxic in drinking water, which becomes an environmental concern worldwide. This work was to synthesize porous hematite through the calcination of natural goethite concentrate for As(III) adsorption, including adsorption kinetics, isotherms and the influence of pH and temperature. The calcination was performed at 300 degrees C for 180 min, producing porous hematite with large amount of micropores. The maximum adsorption capacity of As(III) on porous hematite was achieved at pH 6.0 and 25 degrees C, about 14.46 mg g(-1), compared with 2.965 mg g(-1) on the original goethite concentrate. The improvement might be attributed to the formation of micropores and thus the increase in the surface area. Also, it was found that the adsorption was strongly pH dependent and reduced with increasing temperature. It is indicated that the low-cost porous hematite has great potential in As(III) removal from contaminated water. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：188 / 193

页数：6

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