Adsorption of Cd(II) ions at the hydroxyapatite/electrolyte solution interface

被引：37

作者：

Skwarek, E. ^{[1
]}

Janusz, W. ^{[1
]}

机构：

[1] Marie Curie Sklodowska Univ, Dept Radiochem & Colloid Chem, Maria Curie Sklodowska Sq 5, PL-20031 Lublin, Poland

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2016年 / 51卷 / 01期

关键词：

Hydroxyapatite; Cd(II) ions adsorption; kinetics of ions adsorption; EDL; CALCIUM HYDROXYAPATITES; SORPTION PROPERTIES; CADMIUM IONS; BEHAVIOR;

D O I：

10.1080/01496395.2015.1085878

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The study of the Cd(II) ions adsorption at the hydroxyapatite/electrolyte solution interface and the changes of the electrical double layer (EDL) structure in this system are presented. The adsorption of Cd(II) ions was calculated from the loss of their concentration from the solution using the radioisotope method. The adsorption was studied in the range of the initial concentration from 0.000001 to 0.001mol/dm(3) and as the function of pH. The results of measurements of Cd(II) ions adsorption kinetics on hydroxyapatite were fitted using the pseudo-first, pseudo-second, and multiexponential modes to check which model describes this process in the best way. In addition, the main properties of the EDL, i.e., surface charge density and zeta potential were determined by the potentiometeric titration and electrophoresis measurements, respectively. The adsorption of Cd(II) ions at hydroxyapatite contributed to the increase of the zeta potential and also to the change of the double electrical layer structure.

引用

页码：11 / 21

页数：11

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