Effect of humic acid on cesium sorption on silica colloids

被引：25

作者：

Kumar, S.

Tomar, B. S. ^{[1
]}

Ramanathan, S.

Manchanda, V. K.

机构：

[1] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, Div Mat Sci, Bombay 400085, Maharashtra, India

来源：

RADIOCHIMICA ACTA | 2006年 / 94卷 / 6-7期

关键词：

Cs-137; silica colloids; humic acid; zeta-potential; sorption; linear additive model;

D O I：

10.1524/ract.2006.94.6.369

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Effect of humic acid (HA) on the sorption behaviour of Cs-137 on silica colloids has been studied by batch procedure over a pH range of 3-10 and at ionic strength of 0.05 M (NaClO4). The sorption of Cs-137 on bare silica colloids was found to be negligible up to pH7 above which it was found to increase sharply with pH. In the presence of HA significant enhancement in the sorption of (CS)-C-137 on silica colloids was observed at lower pH values with no effect at pH > 7. Zeta potential of the colloidal suspension of HA, silica and their binary mixture were also measured. Binary interaction between (137) Cs and HA, and that between HA and silica were investigated in order to explain the observations in terms of linear additive model. The data obtained in the present work confirmed the role of non-additive factors in the ternary sorption system.

引用

页码：369 / 373

页数：5

共 18 条

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