Preconcentration of Cr(III) and speciation analysis of chromium employing montmorillonite saturated with potassium ions

Quimica nova

Fernandes, Tatyane Caruso¹  Frois, Sérgio Ribeiro¹  Barreto, Ronaldo Adriano dos Santos¹  Abate, Gilberto¹  Grassi, Marco Tadeu¹ 

[1] Universidade Federal do Paraná, Curitiba, Brasil

关键词: clay minerals;    sorption;    speciation analysis.;   

DOI  :  10.1590/S0100-40422011000300018

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The clay mineralmontmorillonite-K10 (MT), treated under acidic medium and saturated with potassiumions (MTK), was employed in sorption and desorption studies aiming the preconcentrationof Cr(III) and the speciation analysis of chromium. The sorption process ofCr(III) was close to 100%, suggesting that MTK was a good material for Cr(III)preconcentration, although, the maximum recovery in HNO3 solutionwas 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 speciationanalysis of chromium in aqueous medium.

【 授权许可】

CC BY