Adsorption of reactive brilliant red K-2BP on activated carbon developed from sewage sludge
Jiankun XIE 1Qinyan YUE 1Hui YU 1Wenwen YUE 1Renbo LI 1Shengxiao ZHANG 1Xiaona WANG1
作者信息
- 1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
- 折叠
Abstract
Activated carbon was prepared from the sewage sludge of municipal wastewater treatment plant by chemical activation (activation reagent is ZnCl2) and was used for the adsorption of dye (reactive brilliant red K-2BP). The impact of adsorbent amount, adsorption time and pH value on adsorption effect, the adsorption kinetics, and the adsorption thermodynamics were dis-cussed according to batch adsorption tests. The results indicated that the activated carbon developed from sewage sludge (ACSS), which was mesoporous, possessed opened porous structures. The iodine number of the ACSS was heavy metals in the leachate didn't exceed the contents limit. The adsorption kinetics of reactive brilliant red K-2BP on the ACSS was accorded with the two-step kinetics rate equation and pseudo-second-order kinetics equation. Compared to the Freundlich isotherm equation, the Langmuir isotherm equation showed better applicability for the adsorption. The adsorption which was favorable was an endothermic (enthalpy △H > 0) and spontaneous (flee energy △G < 0) process and was accompanied by an increase in entropy (△S > 0).
Key words
activated carbon developed from sewage sludge (ACSS), reactive brilliant red K-2BP, dye adsorp-tion, adsorption kinetics, adsorption thermodynamics引用本文复制引用
基金项目
Jinan Science and Technology Development Program, China(061073)
出版年
2008
NETL
NSTL
万方数据