Core-Shell Structured Magnetic γ-Fe2O3@PANI Nanocomposites for Enhanced As(V) Adsorption

被引：47
作者：
Zhang, Yan [1 ]
Jiang, Debin [1 ]
Wang, Yuan [1 ]
Zhang, Tian C. [2 ]
Xiang, Gang [3 ]
Zhang, Yu-Xin [4 ]
Yuan, Shaojun [1 ]
机构：
[1] Sichuan Univ, Low Carbon Technol & Chem React Engn Lab, Chengdu 610065, Peoples R China
[2] Univ Nebraska Lincoln, Civil & Environm Engn Dept, Omaha, NE 68182 USA
[3] Sichuan Univ, Coll Phys Sci & Technol, Chengdu 610065, Peoples R China
[4] Chongqing Univ, State Key Lab Mech Transmiss, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2020年 / 59卷 / 16期
基金：
中国国家自然科学基金;
关键词：
AQUEOUS-SOLUTIONS; ARSENIC REMOVAL; CHITOSAN MICROSPHERES; CONTAMINATED WATER; POLYANILINE; IONS; SORPTION; AS(III); ACID; NANOPARTICLES;
D O I：
10.1021/acs.iecr.9b07080
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Core-shell structured magnetic gamma-Fe2O3 coated with proton acid doping polyaniline nanocomposites (gamma-Fe2O3@PANI) were synthesized and used to adsorb arsenic(V) in aqueous solutions. Results indicated that the as-synthesized gamma-Fe2O3@PANI had a rapid adsorption rate and high adsorption capacity (0.502 mmol/g) for arsenic(V) removal in a pH range of 4 to 11. The adsorption process obeyed a pseudo-second-order kinetic model and was controlled by intraparticle diffusion and external liquid film diffusion. The Redlich-Peterson isotherm model was suitable to simulate the experiment data, indicating that both the physical and chemical adsorption occurred on the heterogeneous adsorption interfaces. The postulated adsorption mechanism of As(V) on the gamma-Fe2O3@PANI nanocomposite was possibly ascribed to electrostatic interaction and hydrogen bonding. These results suggest that the magnetic gamma-Fe2O3@PANI nanocomposite offers a promising candidate for the adsorption of As(V) in practical applications.
引用
收藏
页码：7554 / 7563
页数：10
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