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

• Published in: Applied radiation and isotopes Vol. 68; no. 12; pp. 2208 - 2213
• Main Authors: Espinoza-Quiñones, Fernando R., Módenes, Aparecido N., Câmera, Adriana S., Stutz, Guillermo, Tirao, German, Palácio, Soraya M., Kroumov, Alexander D., Oliveira, Ana P., Alflen, Vanessa L.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-12-2010
• Subjects: Activated carbon; Adsorption; Cr(VI) reduction; High-resolution Kβ spectroscopy; Cr(VI) reduction; Adsorption; Activated carbon; High-resolution Kβ spectroscopy
• ISSN: 0969-8043; 1872-9800
• DOI: 10.1016/j.apradiso.2010.06.006

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–Kβ 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.