@article{(Open Science Index):https://publications.waset.org/pdf/12632,
	  title     = {Mass Transfer Modeling of Nitrate in an Ion Exchange Selective Resin},
	  author    = {A. A. Hekmatzadeh and  A. Karimi-Jashani and  N. Talebbeydokhti},
	  country	= {},
	  institution	= {},
	  abstract     = {The rate of nitrate adsorption by a nitrate selective ion
exchange resin was investigated in a well-stirred batch experiments.
The kinetic experimental data were simulated with diffusion models including external mass transfer, particle diffusion and chemical
adsorption. Particle pore volume diffusion and particle surface diffusion were taken into consideration separately and simultaneously
in the modeling. The model equations were solved numerically using the Crank-Nicholson scheme. An optimization technique was
employed to optimize the model parameters. All nitrate concentration
decay data were well described with the all diffusion models. The
results indicated that the kinetic process is initially controlled by external mass transfer and then by particle diffusion. The external
mass transfer coefficient and the coefficients of pore volume diffusion and surface diffusion in all experiments were close to each
other with the average value of 8.3×10-3 cm/S for external mass
transfer coefficient. In addition, the models are more sensitive to the
mass transfer coefficient in comparison with particle diffusion. Moreover, it seems that surface diffusion is the dominant particle
diffusion in comparison with pore volume diffusion.},
	    journal   = {International Journal of Civil and Environmental Engineering},
	  volume    = {6},
	  number    = {1},
	  year      = {2012},
	  pages     = {58 - 63},
	  ee        = {https://publications.waset.org/pdf/12632},
	  url   	= {https://publications.waset.org/vol/61},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 61, 2012},
	}