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| Preparation and Adsorption Property of of Activated Carbon from Ligin |
| TIAN Long1,2 MA Xiaojian1** |
1. College of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001;
2. Nanyang Normal University, Nanyang 473061 |
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Cite this article:
TIAN Long, MA Xiaojian. Preparation and Adsorption Property of of Activated Carbon from Ligin. Chinese Journal of Materials Research, 2013, 27(2): 219-224.
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Abstract Activated carbon from ligin was prepared by phosphate activation in this paper. The effects of 4 factors such as impregnation ratio, phosphate concentration, activation temperature and activation time on the adsorption properties of activated carbons and yield were investigaited. The results show activated carbon iodine adsorption value and methylene blue adsorption value increase at first and then decrease with the increase of impregnation ratio, phosphate concentration, activation temperature and activation time. The four factors contribute to the formation of more micropores, and improve activated carbon adsorption properties. However exceeding a certain level, the internal part of the micropores of the activated carbon between the bore wall thin even burn, resulting in the microporous expanded to the hole and even largeholes. At the same time, phosphate can react with the carbon atoms of a hole wall forming the microporous structure, causing the carbon material excessive ablation, the large pore size, so that the adsorption properties of the activated carbon is reduced. The equilibrium adsorption datum match Freundlich model well. The adsorptions of phenol by activated carbon resin are in accordance with Freundlich isotherm model, and the adsorption kinetics data fit well with the Lagergren pseudo-second order rate equation.
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