CATION ADSORPTION ON OXIDES AND CLAYS - THE ALUMINUM CASE

被引：90

作者：

CHARLET, L

SCHINDLER, PW

SPADINI, L

FURRER, G

ZYSSET, M

机构：

[1] UNIV GRENOBLE,LGIT,ENVIRONM GEOCHEM GRP,F-38041 GRENOBLE,FRANCE

[2] ETH ZURICH,INST TERR ECOL,CH-8952 SCHLIEREN,SWITZERLAND

[3] WSL,FED INST FORESTRY RES,CH-8903 BIRMENSDORF,SWITZERLAND

来源：

AQUATIC SCIENCES | 1993年 / 55卷 / 04期

关键词：

SURFACE COMPLEXATION; MONTMORILLONITE; SILICA; ALUMINUM; PROTON SURFACE CHARGE;

D O I：

10.1007/BF00877274

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The sorption mechanisms for trace metal ions on montmorillonite have been investigated. Complexation with surface hydroxyl groups located on the brocken edges of platelet particles is found to occur over a pH range similar to that observed on silica and other oxides, at comparable metal/site ratios. A second mechanism involving cation exchange on the negatively charge basal plane, which does not involve proton exchange in our experimental conditions, has been invoked to explain the low pH behavior. Consistent with this cation exchange mechanism, adsorption at low pH is strongly ionic strength dependant. A quantitative model which involves both mechanisms is presented and tested against both cation and proton adsorption data.

引用

页码：291 / 303

页数：13

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