期刊
WATER RESEARCH
卷 47, 期 12, 页码 4107-4114出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2012.10.039
关键词
Magnetic mesoporous nanocomposite; MCM-48; Adsorption; Sulfamethazine; Water
资金
- National Natural Science Foundation of China [20837001, 50921064]
- Ministry of Science and Technology of China [2012AA062606]
- State Key Joint Laboratory of Environment Simulation and Pollution Control [12L02ESPC]
A novel magnetic mesoporous nanocomposite FeM48 was synthesized and applied to remove sulfamethazine (SMN) from water. The adsorption kinetics could be expressed by the pseudo-second-order model, where external and interfacial diffusions tended to be the rate-limiting step. The adsorption isotherms at varied temperatures were fitted well with Freundlich model, and thermodynamic analysis revealed that SMN adsorption on FeM48 was a spontaneous exothermic process. Solution pH exhibited a remarkable impact on the adsorption process and the maximum adsorbed concentration was obtained at 6.3. The effect of co-existing anions and humic acid demonstrated that SMN could be adsorbed selectively by FeM48. Hydrogen bonding between the nitrogen of the aniline, sulfinol or pyrimidine group of SMN and the surface hydroxyl group of FeM48 was the major driving force for adsorption. In addition, the pi-pi electron-donor acceptor interaction between SMN (pi-electron acceptor) and MCM-48 (pi-electron donor) also promoted the adsorption process. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据