Journal
DESALINATION
Volume 279, Issue 1-3, Pages 423-427Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2011.06.001
Keywords
Activated carbon; Resin; Trivalent chromium; Ultrasound; Adsorption
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Funding
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF10009]
- Natural Science Foundation of Overseas Chinese Affairs Office of the State Council [09QZR07]
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The effect of ultrasound on the adsorption and desorption of Cr(VI) on activated carbon and PVC-PPA resin were investigated. The results indicated that, on resin, the adsorption rate increased and the equilibrium time decreased obviously in the presence of ultrasound, while on activated carbon, ultrasound only enhanced the adsorption rate slightly at the initial stage of adsorption. Ultrasound didn't influence the desorption rates of Cr (VI) from both activated carbon and resin in distilled water. The addition of NaOH to the system caused an enhancement of Cr(VI) desorption, especially on activated carbon in the presence of ultrasound. After acid-treatment, the ultrasonic regenerated activated carbon had a good re-adsorption capacity. (C) 2011 Elsevier B.V. All rights reserved.
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