Sorption of lead ion by layered double hydroxide intercalated with diethylenetriaminepentaacetic acid

被引：110
|
作者：
Liang, Xuefeng [1 ,2 ,3 ]
Hou, Wanguo [4 ]
Xu, Yingming [1 ,2 ,3 ]
Sun, Guohong [5 ]
Wang, Lin [1 ,2 ,3 ]
Sun, Yang [1 ,2 ,3 ]
Qin, Xu [1 ,2 ,3 ]
机构：
[1] Minist Agr, Dept Pollut Control, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
[2] Minist Agr, Key Lab Prod Environm & Agroprod Safety, Tianjin 300191, Peoples R China
[3] Tianjin Key Lab Agroenvironm & Food Safety, Tianjin 300191, Peoples R China
[4] Shandong Univ, Key Lab Colloid & Interface Chem, Educ Minist, Jinan 250100, Peoples R China
[5] Tianjin Agr Univ, Dept Elementary Sci, Tianjin 300384, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2010年 / 366卷 / 1-3期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Layered double hydroxide; Diethylenetriaminepentaacetic acid; Lead; Sorption; CHELATING-AGENTS; AQUEOUS-SOLUTION; ANIONIC CLAYS; METAL-IONS; ADSORPTION; REMOVAL; PB(II); SURFACE; CU2+; PB2+;
D O I：
10.1016/j.colsurfa.2010.05.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Mg2Al layered double hydroxide (Mg2Al LDH) samples intercalated with diethylenetriaminepentaacetic acid (DTPA) (Mg2Al-DTPA LDH in short) were prepared by co-precipitation and well characterized by XRD, SEM, TEM, IR and XPS. The sorption behaviors and mechanisms of Pb2+ on the samples were studied in detail while Mg2Al-Cl LDH as a reference. The maximum sorption amounts were about 170 and 40 mg/g for Mg2Al-DTPA LDH and Mg2Al-Cl LDH, respectively. Langmuir isotherm was proved to describe the sorption data better and pseudo-second order kinetic model could fit the sorption kinetic processes better for both LDHs samples. The mechanisms of Pb2+ sorption on Mg2Al-DTPA LDH can be explained by Pb-DTPA chelating while that for Mg2Al-Cl LDH is primary surface-induced precipitation. The Mg2Al-DTPA LDH could provide a potential remedy for heavy metal contamination in soils and water. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：50 / 57
页数：8
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