High performance NiFe layered double hydroxide for methyl orange dye and Cr(VI) adsorption

被引：259
作者：
Lu, Yi [1 ,2 ]
Jiang, Bin [2 ]
Fang, Liang [1 ]
Ling, Faling [1 ]
Gao, Jiemei [1 ]
Wu, Fang [1 ]
Zhang, Xihua [1 ,3 ]
机构：
[1] Chongqing Univ, Coll Phys, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[3] Chongqing Univ Technol, Sch Optoelect Informat, Chongqing 400054, Peoples R China
来源：
CHEMOSPHERE | 2016年 / 152卷
基金：
中国国家自然科学基金;
关键词：
NiFe-LDH; Anions exchange; Charge density; Methyl orange (MO); Cr(VI); AQUEOUS-SOLUTIONS; REMOVAL; KINETICS; HYDROTALCITE; WASTEWATERS; COMPOSITE; CHROMIUM; BLUE; RED;
D O I：
10.1016/j.chemosphere.2016.03.015
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The NiFe layered double hydroxides (LDHs) with different mole ratio of Ni/Fe (4:1, 3:1, 7:3 and 1:1) were prepared by a simple coprecipitation method. The adsorption performance were evaluated by the removal of methyl orange (MO) dye and hexavalent chromium(VI) heavy metal ion. It is found that Ni4Fe1-LDH can remove more than 92% of MO in 10 min at the 10 mg/L MO initial concentration, and 97% of Cr(VI) in 1 hat 4 mg/L Cr2O72- initial concentration. The saturated adsorption capacity of Ni4Fe1-LDH is found to be as large as 205.76 mg/g for MO and 26.78 mg/g for Cr(VI). The adsorption behavior of this new adsorbent is fitted well with Langmuir isotherm and the pseudo-second-order kinetic model, indicative of a monolayer and chemical adsorption that synergistically originates from exchangeable anions mechanism and layer charge density. Due to the excellent removal capacity of MO and Cr(VI), the NiFe-LDHs could be a promising adsorbent for wastewater treatment. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：415 / 422
页数：8
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