Preparation of L-arginine modified magnetic adsorbent by one-step method for removal of Zn(II) and Cd(II) from aqueous solution

被引：66
作者：
Guo, Shuangzhen [1 ]
Jiao, Pengpeng [1 ]
Dan, Zhigang [2 ]
Duan, Ning [1 ,2 ]
Chen, Guanyi [1 ]
Zhang, Jian [3 ]
机构：
[1] Tianjin Univ, Sch Environm Sci & Engn, 92 Weijin Rd, Tianjin 300072, Peoples R China
[2] Chinese Res Inst Environm Sci, 8 Dayangfang BeiYuan Rd, Beijing 100012, Peoples R China
[3] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2017年 / 317卷
基金：
美国国家科学基金会;
关键词：
L-arginine; Magnetic nanomaterials; Zn(II) and Cd(II); Adsorption; HEAVY-METAL IONS; COMPETITIVE ADSORPTION; METHYLENE-BLUE; CARBON; PARTICLES; EQUILIBRIUM; MEMBRANES; RECOVERY; CADMIUM; BINARY;
D O I：
10.1016/j.cej.2017.02.136
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 type of magnetic adsorbent was prepared using a simple one-step synthesis for the removal of Zn (II) and Cd(II) from aqueous solution. Structure characterization demonstrated that the surface of the magnetic nanoparticles (MNPs) had been modified by L-arginine. Factors that affect the adsorption of Zn(II) and Cd(II) onto the MNPs modified with L-arginine (MNPs-L), such as pH, ionic strength, initial concentration, contact time, temperature, and compete adsorption, were investigated. The adsorption kinetic data followed the pseudo-second-order model (PSOE) and the intra particle diffusion model (IPD). Isotherm data demonstrate that the Langmuir absorption model was the best-suited model for this research, and the calculated maximum adsorption capacities of Zn(II) and Cd(II) were 150.4 mg/g and 120.2 mg/g, respectively. Thermodynamic parameters indicated a spontaneous and endothermic adsorption process. In addition, regeneration studies suggested that MNPs-L were stable. Thus, MNPs-L could be a promising material for removing Zn(II) and Cd(II) from wastewater. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：999 / 1011
页数：13
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