Impact of pH on the adsorption and desorption kinetics of 2-nitrophenol on activated carbons

被引：32

作者：

Karimi-Jashni, A ^{[1
]}

Narbaitz, RM ^{[1
]}

机构：

[1] Univ Ottawa, Dept Civil Engn, Ottawa, ON K1N 6N5, Canada

来源：

WATER RESEARCH | 1997年 / 31卷 / 12期

关键词：

adsorption kinetics; desorption kinetics; homogeneous solid surface diffusion model; pH; activated carbon;

D O I：

10.1016/S0043-1354(97)00176-0

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption and desorption kinetics of 2-nitrophenol (2NP) from aqueous solutions using F-400 and WV-B granular activated carbons (GAG) have been studied at pHs 1, 4.6 and 13, using batch tests. Adsorption and desorption kinetics of 2NP on to both carbons were adequately described by the homogeneous solid surface diffusion model (HSSD). The adsorption and desorption kinetics can be predicted at different pHs by using adsorption kinetics parameters of the pH 4.6 and the isotherm parameters for the corresponding pH. Thus, the differences in the rates of adsorption are primarily attributable to the differences in the equilibrium loadings at the various pHs. (C) 1997 Elsevier Science Ltd.

引用

页码：3039 / 3044

页数：6

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