Adsorption of reactive brilliant red K-2BP on activated carbon developed from sewage sludge

• 来源期刊: 中国高等学校学术文摘·化学
• 关键词: activated carbon developed from sewage sludge (ACSS) reactive brilliant red K-2BP dye adsorp-tion adsorption kinetics adsorption thermodynamics
• 年，卷（期）: 2008,（1）
• 页码范围: 33-40
• 页数: 8页
• 语种: 英文
• DOI: 10.1007/s11458-008-0014-3

摘要

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).