期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 20, 期 5, 页码 2888-2894出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.11.024
关键词
Magnetic resin; Nitrate; Adsorption; Kinetic; Removal efficiency
资金
- National Natural Science Foundation [51178215, 51378251]
- Jangsu Natural Science Fund, PR China [BK2011032, BK20130575]
- Major Science and Technology Program for Water Pollution Control and Treatment, PR China [2012ZX07204-001, 2013ZX07210-001, 2014ZX07214-001]
- Scientific Research Starting Fund, Nanjing University [021114340069]
In order to quickly remove nitrate from aqueous solution, a magnetic strong base quaternary ammonium anion exchange resin (MAER) has been successfully designed and synthesized. The physicochemical properties of the MAER as well as its adsorption ones for nitrate removal were investigated in detail. A series of batch experiments were carried out to evaluate the effects of several factors on removal efficiency of nitrate, such as retention time, resin amount and initial nitrate concentration. Compared to the commercial Purolite A300 and D213, the equilibrium time for the adsorption process using MAER was only around 20 min, which is significantly less than that of two ones mentioned. Furthermore, the kinetic process of nitrate sorption on MAER could be well described by both pseudo-first-order and pseudo-second-order models. In addition, the results of batch experiments can be better fitted by the Langmuir and Freundlich adsorption isotherm models. Most importantly, the effects of competing ions on nitrate removal followed the order as: SO42- > Cl- > HCO3-. These results are of significance in guiding the development of novel resins with the rapid nitrate removal rate from aqueous solution, which would improve efficiency and save energy greatly. Crown Copyright (C) 2013 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry. All rights reserved.
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