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

被引：262

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

页码：415 / 422

页数：8

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