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Article
Adsorption of Chromium (VI) onto Activated Carbon Modified with KMnO4
Author(s)
Meiling Pang1, Bing Liu1, 2, Naoki Kano3*and Hiroshi Imaizumi3
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DOI:10.17265/1934-7375/2015.04.006
Affiliation(s)
1. Graduate School of Science and Technology, Niigata University, Niigata 950-2102, Japan 2. Department Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China 3. Department of Chemistry and Chemical Engineer, Faculty of Engineer, Niigata University, Niigata 950-2102, Japan
ABSTRACT
The adsorption capacity of activated carbon modified with KMnO4 (potassium permanganate) for Cr(VI) from aqueous solution was investigated. The modified activated carbon was characterized by SEM (scanning electron microscopy), FT-IR (Fourier transform infrared spectrometer), and N2 adsorption/desorption tests. Adsorption of Cr(VI) from aqueous solution onto the activated carbon was investigated in a batch system. In the present study, the effect of various parameters such as pH, contact time and initial concentration on the adsorption capacity were determined by ICP-AES (inductively coupled plasma atomic emission spectrometry). The Cr(VI) adsorption on the activated carbon conforms to the Langmuir and Freundlich isothermal adsorption equation. The rates of adsorption were found to conform to pseudo-second order kinetic. The modified activated carbon can be an effective adsorbent for Cr(VI) from the aqueous solution.
KEYWORDS
Modified activated carbon, chromium, adsorption isotherms, kinetics.
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