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Acta Phys. Chim. Sin.  2015, Vol. 31 Issue (10): 1956-1962    DOI: 10.3866/PKU.WHXB201508212
CATALYSIS AND SURFACE SCIENCE     
Effect of Activated Carbon Pore Structure on the Adsorption of Pb(II) from Aqueous Solution
YANG Jie-Yang, HUANG Zhang-Gen, HAN Xiao-Jin, JING Wen, ZENG Ze-Quan
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
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Abstract  

Pb(II) adsorption by three activated carbons (ACs) with similar surface chemistry but different pore distributions was investigated by isothermal adsorption experiments. The ACs were characterized by scanning electron microscopy (SEM) and N2 adsorption at 77 K, while the micropore and mesopore size distributions were obtained from the density functional theory (DFT) and the Barrett-Joyner-Halenda (BJH) method, respectively. The specific surface area and total volume were ranked in order of AC1, AC2, and AC3. The AC2 sample had a uniform distribution of open pores on the surface and the highest saturating adsorption capacity, while the capacity of AC3, which had more aggregated pores, was similar to that of AC1, which had a concentrated distribution of open pores on the surface. A correlation analysis of pore structure and adsorption capacity indicated that pores with diameters in the range of 0.4-0.6 nm were favorable for Pb(II) adsorption, whereas pores with diameters in the ranges of 10.5-20.6 nm, 20.6-55.6 nm, and 5.2-10.5 nm had an adverse effect.



Key wordsActivated carbon      Pore structure      Adsorption      Pb(II)     
Received: 02 July 2015      Published: 21 August 2015
MSC2000:  O647  
Corresponding Authors: HUANG Zhang-Gen     E-mail: zghuang@sxicc.ac.cn
Cite this article:

YANG Jie-Yang, HUANG Zhang-Gen, HAN Xiao-Jin, JING Wen, ZENG Ze-Quan. Effect of Activated Carbon Pore Structure on the Adsorption of Pb(II) from Aqueous Solution. Acta Phys. Chim. Sin., 2015, 31(10): 1956-1962.

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http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB201508212     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2015/V31/I10/1956

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