Thermodynamics of Phenol Adsorption onto Activated Carbon Fiber

Mei Li; Yi Luo; Tao Xie; Ming Zheng Liang; Shuang Fei Wang

doi:10.4028/www.scientific.net/AMR.415-417.1599

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Thermodynamics of Phenol Adsorption onto Activated...

Thermodynamics of Phenol Adsorption onto Activated Carbon Fiber

Abstract:

The adsorption of phenol onto activated carbon fiber (ACF) from aqueous solutions were studied. The adsorption isotherms of phenol onto ACF at 298.15 K,303.15 K and 308.15K follow the Freundlich and Langmuir isotherm equation. The Freundlich model was verified to be the best to describe the adsorption data.Values of ∆G⁰ for phenol adsorption onto ACF are-8.549、-7.899 and -7.516 kJ•mol-1 at 298.15,303.15and 308.15K , respectively. The values of ∆H⁰ and ∆S⁰ are -39.30 kJ•mol-1 and -103.3 J.mol-1.k-1, respectively. The adsorption process is spontaneous and exothermic. Negative △S⁰ values suggested the randomness of phenol molecules at solid-liquid interface and an decrease in the degree of freedom of the adsorbed species.

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Periodical:

Advanced Materials Research (Volumes 415-417)

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1599-1602

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.415-417.1599

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Online since:

December 2011

Authors:

Mei Li, Yi Luo, Tao Xie, Ming Zheng Liang, Shuang Fei Wang

Keywords:

Activated Carbon Fiber (ACF), Adsorption, Phenol, Thermodynamic

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