화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.20, No.5, 2888-2894, September, 2014
DOI10.1016/j.jiec.2013.11.024  Export Citation
Accelerated removal of nitrate from aqueous solution by utilizing polyacrylic anion exchange resin with magnetic separation performance
Haiou Song1, 2, Zhijian Yao1, 3, Chendong Shuang1, 2, and Aimin Li1, 2, †
  • 1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
  • 2National Engineering Research Center for Organic Pollution Control and Resources Reuse, Collaborative Innovation Center of Advanced Technology and Equipment for Water Pollution Control, Nanjing University & Yancheng Academy of Environmental Protection Tec, Nanjing 210023, Yancheng 210009, PR China
  • 3National Engineering Research Center for Organic Pollution Control and Resources Reuse, Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Nanjing 210023, Yancheng 210009, PR China
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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: SO4 2- > 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.
Keywords:Magnetic resin;Nitrate;Adsorption;Kinetic;Removal efficiency
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