A novel magnetic adsorbent based on waste litchi peels for removing Pb(II) from aqueous solution

被引：86

作者：

Jiang, Ruixue ^{[1
,2
]}

Tian, Jiyu ^{[1
]}

Zheng, Hao ^{[1
]}

Qi, Jinqiu ^{[1
]}

Sun, Shujuan ^{[1
]}

Li, Xiaochen ^{[1
]}

机构：

[1] Shandong Agr Univ, Water Conservancy & Civil Engn Coll, Tai An 271018, Shandong, Peoples R China

[2] Hohai Univ, Environm Sci & Engn Coll, Nanjing 210098, Jiangsu, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2015年 / 155卷

基金：

中国国家自然科学基金;

关键词：

Litchi peel; Magnetic bioadsorbent; Pb(II); Adsorption; Separation; HEAVY-METAL; HUMIC-ACID; ADSORPTION; EQUILIBRIUM; KINETICS; CHITOSAN; CU(II); IONS; BIOSORPTION; CD(II);

D O I：

10.1016/j.jenvman.2015.03.009

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A new magnetic bioadsorbent, magnetic litchi peel (MLP), was synthesized by coating powdered litchi peel with Fe3O4, and was used for removing Pb(II) from aqueous solutions. The influencing factors, adsorption isotherms, kinetics, and thermodynamics of Pb(II) adsorption by MLP were investigated using batch assays. Optimum Pb(II) adsorption. by MLP was achieved using a contact time of 120 min, an adsorbent dose of 5 g/L, and pH of 6.0. The adsorption equilibrium data conformed to the Langmuir isotherm model, yielding a maximum Pb(II) adsorption capacity of 78.74 mg/g. The adsorption kinetics for Pb(II) adsorption by MLP followed a pseudo-second-order model. The thermodynamic results suggested that Pb(II) adsorption by MLP was spontaneous and exothermic. Additionally, the magnetic adsorbent was easily and rapidly separated out of solution under an external magnetic field. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：24 / 30

页数：7

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