Ciprofloxacin adsorption from aqueous solution onto chemically prepared carbon from date palm leaflets

作     者：El-Said Ibrahim El-Shafey Haider Al-Lawati Asmaa Soliman Al-Sumri 

作者机构：Department of ChemistryCollege of ScienceSultan Qaboos UniversityP.O.Box 36-Al-Khodh 123MuscatOman 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第9期

页      面：1579-1586页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

主　　题：ciprofloxacin carbon adsorption palm leaflets 

摘      要：A chemically prepared carbon was synthesized from date palm leaflets via sulphuric acid carbonization at 160℃. Adsorption of ciprofloxacin （CIP） from aqueous solution was investigated in terms of time, pH, concentration, temperature and adsorbent status （wet and dry）. The equilibrium time was found to be 48 hr. The adsorption rate was enhanced by raising the temperature for both adsorbents, with adsorption data fitting a pseudo second-order model well. The activation energy, Ea, was found to be 17 kJ/mol, indicating a diffusion-controlled, physical adsorption process. The maximum adsorption was found at initial pH 6. The wet adsorbent showed faster removal with higher uptake than the dry adsorbent, with increased performance as temperature increased （25--45℃）. The equilibrium data were found to fit the Langmuir model better than the Freundlich model. The thermodynamic parameters showed that the adsorption process is spontaneous and endothermic. The adsorption mechanism is mainly related to cation exchange and hydrogen bonding.