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논문 기본 정보

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동향자료
저자정보
Youssef, A.M. (Department of Chemistry, Faculty of Science, Mansoura University) Hassan, A.F. (Department of Chemistry, Faculty of Science, Damanhour University) Safan, M. (Department of Mathematics, Faculty of Science, Mansoura University)
저널정보
한국탄소학회 Carbon letters Carbon letters 제14권 제1호
발행연도
2013.1
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14 - 21 (8page)

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초록· 키워드

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Physically and chemically activated carbons (ACs) exhibited high adsorption capacities for organic and inorganic pollutants compared with other adsorbents due to their expanded surface areas and wide pore volume distribution. In this work, seven steam-ACs with different burn-off have been prepared from cotton stalks. The textural properties of these sorbents were determined using nitrogen adsorption at $-196^{\circ}C$. The chemistry of the surface of the present sorbents was characterized by determining the surface functional C-O groups using Fourier transform infrared spectroscopy, surface pH, $pH_{pzc}$, and Boehm's acid-base neutralization method. The textural properties and the morphology of the sorbent surface depend on the percentage of burn-off. The surface acidity and surface basicity are related to the burn-off percentage. A theoretical model was developed to find a mathematical expression that relates the % burn-off to ash content, surface area, and mean pore radius. Also, the chemistry of the carbon surface is related to the % burn-off. A mathematical expression was proposed where % burn-off was taken as an independent factor and the other variable as a dependent factor. This expression allows the choice of the value of % burn-off with required steam-AC properties.

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