Sorption of silicates on goethite, hematite, and magnetite: Experiments and modelling

被引：89
|
作者：
Jordan, Norbert
Marmier, Nicolas
Lomenech, Claire
Giffaut, Eric
Ehrhardt, Jean-Jacques
机构：
[1] Univ Nice, Lab Radiochem Sci Analyt & Environm, F-06108 Nice 2, France
[2] Agence Natl Gest Dechets Radioactifs, F-92298 Chatenay Malabry, France
[3] Univ Nancy, CNRS, UMR 7564, Lab Chim Phys & Microbiol Environm, F-54600 Villers Les Nancy, France
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2007年 / 312卷 / 02期
关键词：
silicates; sorption; iron oxides; surface complexation model;
D O I：
10.1016/j.jcis.2007.03.053
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：
Sorption of H4SiO4 (including experiments as a function of time, K-d measurement with different m/v ratios and sorption edges) onto different iron (hydro)oxides as goethite (ci-FeOOH), hematite (alpha-Fe2O3), and magnetite (Fe3O4) has been studied with concentration of silicates under solubility limit. A surface complexation model has been used to account for sorption edge of silicates onto these iron oxide surfaces. It reveals that two types of surface complex namely equivalent to FeH3SiO4 and equivalent to FeH2SiO4-, are needed to describe properly the experimental observations. (c) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码：224 / 229
页数：6
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