PRECONCENTRATION OF Cr(III) AND SPECIATION ANALYSIS OF CHROMIUM EMPLOYING MONTMORILLONITE SATURATED WITH POTASSIUM IONS

被引：17

作者：

Frois, Sergio Ribeiro ^{[1
]}

Grassi, Marco Tadeu ^{[1
]}

Fernandes, Tatyane Caruso ^{[1
]}

dos Santos Barreto, Ronaldo Adriano ^{[1
]}

Abate, Gilberto ^{[1
]}

机构：

[1] Univ Fed Parana, Dept Quim, BR-81531990 Curitiba, PR, Brazil

来源：

QUIMICA NOVA | 2011年 / 34卷 / 03期

关键词：

clay minerals; sorption; speciation analysis; SOLID-PHASE EXTRACTION; HEAVY-METALS; SILICA-GEL; DIPHENYLCARBAZIDE COMPLEX; AQUEOUS-SOLUTIONS; WATER SAMPLES; ADSORPTION; SORPTION; ACID; SEPARATION;

D O I：

10.1590/S0100-40422011000300018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

PRECONCENTRATION OF Cr(III) AND SPECIATION ANALYSIS OF CHROMIUM EMPLOYING MONTMORILLONITE SATURATED WITH POTASSIUM IONS. The clay mineral montmorillonite-K10 (MT), treated under acidic medium and saturated with potassium ions (MTK), was employed in sorption and desorption studies aiming the preconcentration of Cr(III) and the speciation analysis of chromium. The sorption process of Cr(III) was close to 100%, suggesting that MTK was a good material for Cr(III) preconcentration, although, the maximum recovery in HNO3 solution was near 89%. On the other hand, Cr(VI) practically was not retained in MTK, suggesting this material as an appropriate mineral phase to be used in speciation analysis of chromium in aqueous medium.

引用

页码：462 / 467

页数：6

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