期刊
APPLIED SURFACE SCIENCE
卷 265, 期 -, 页码 393-398出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2012.11.019
关键词
Removal; Methyl orange; Polyethylenimine; Quaternary ammonium
类别
资金
- National Natural Science Foundation of China [21205002]
- Natural Science Foundation of Educational Department of Anhui Province [KJ2011A150]
- Innovative Research Foundation of Anhui Normal University [2010cxjj09]
Quaternary ammonium polyethylenimine (PEI) was successfully modified to silica nanoparticle (QPEI/SiO2) as a new adsorbent to remove methyl orange from aqueous solution. The isotherm and kinetics of dye adsorption were studied, which showed that Langmuir isotherm fit the experimental results well. The maximum adsorption capacity of QPEI/SiO2 for methyl orange is 105.4 mg/g. The equilibrium time for methyl orange adsorption onto QPEI/SiO2 was as short as 10 min, indicating that the adsorbent has a strong affinity for methyl orange. The adsorption capacities of the methyl orange are slightly influenced by the pH in the range of 3.2-9.6. The QPEI/SiO2 adsorbent can be used in the wide pH range, which is different from other adsorbent. This may attribute to the quaternary ammonium carrying positive charges in acidic and basic solution. (C) 2012 Elsevier B.V. All rights reserved.
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