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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 518-523Effect of Modification with Nitric Acid and...

Effect of Modification with Nitric Acid and Hydrogen Peroxide on Chromium (VI) Adsorption by Activated Carbon Fiber

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Abstract:

The activated carbon fiber (ACF) was treated by different concentration nitric acid (HNO₃) and hydrogen peroxide (H₂O₂) oxidization to enhance its adsorption capacity to hexavalent chromium (Cr⁶⁺) ion. The adsorption amount and adsorption kinetics of Cr⁶⁺ ion on ACFs, and the surface chemical groups were investigated. The results showed that the modified ACFs with 1% HNO₃ and 10% H²O² had a better adsorption capacity, respectively. The adsorption amount of ACFs was affected strongly solution pH value, and decreased significantly with increasing of the pH value. The adsorption kinetics indicated that the adsorption rates of Cr6+ ion on different modified ACFs were well fitted with the pseudo-second-order kinetic model. After 1% HNO₃ and 10% H₂O₂ modification, respectively, the total acidic oxygen-containing groups on ACFs surface had an increase obviously, which might be enhance the adsorption amount of Cr⁶⁺ ion on ACFs.

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Periodical:

Advanced Materials Research (Volumes 518-523)

Pages:

2099-2103

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.518-523.2099

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Online since:

May 2012

Authors:

Guang Zhou Qu, Hai Bing Ji, Ran Xiao, Dong Li Liang

Keywords:

Activated Carbon Fiber (ACF), Adsorption, Heavy Metal, Modification

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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