Application of high resolution X-ray emission spectroscopy on the study of Cr ion adsorption by activated carbon

Fernando R Espinoza-Quiñones; Aparecido N Módenes; Adriana S Câmera; Guillermo Stutz; German Tirao; Soraya M Palácio; Alexander D Kroumov; Ana P Oliveira; Vanessa L Alflen

doi:10.1016/j.apradiso.2010.06.006

Application of high resolution X-ray emission spectroscopy on the study of Cr ion adsorption by activated carbon

Appl Radiat Isot. 2010 Dec;68(12):2208-13. doi: 10.1016/j.apradiso.2010.06.006. Epub 2010 Jun 9.

Authors

Fernando R Espinoza-Quiñones¹, Aparecido N Módenes, Adriana S Câmera, Guillermo Stutz, German Tirao, Soraya M Palácio, Alexander D Kroumov, Ana P Oliveira, Vanessa L Alflen

Affiliation

¹ Postgraduate Program of Chemical Engineering, NBQ, Paraná West State University, Rua da faculdade 645, 85903-000 Toledo, Paraná, Brazil. f.espinoza@terra.com.br

PMID: 20561795
DOI: 10.1016/j.apradiso.2010.06.006

Abstract

In this work granular activated carbon has been chosen as an absorbent in order to investigate the Cr(VI) reduced by adsorption experiments. Several batch chromium-sorption experiments were carried out using 0.25 g of granular activated carbon in 50 mL aqueous solution containing approximately 70 and 140 mg L(-1) of Cr(VI) and Cr(III), respectively. Cr-Kbeta fluorescence spectra of Cr adsorbed in a carbon matrix and Cr reference materials were measured using a high-resolution Johann-type spectrometer. Based on evidence from the Cr-Kb satellite lines, the Cr(VI) reduction process has actually happened during metal adsorption by the activated carbon.