Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport

Ehsan Salehi

doi:10.1016/j.cjche.2016.04.034

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Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport

Separation Science and Engineering | Updated：2026-01-06

- Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport
- Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport
- 中国化学工程学报（英文版） 2016年24卷第9期页码：1161-1165
- Affiliations：
  
  Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8,Iran,8349
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.04.034
  中图分类号： 10.1016/j.cjche.2016.04.034
- 纸质出版：2016
- Accepted：
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Ehsan Salehi. Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport[J]. 中国化学工程学报（英文版）, 2016,24(9):1161-1165.

Ehsan Salehi. Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport[J]. , 2016, 24(9): 1161-1165.
Ehsan Salehi. Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport[J]. 中国化学工程学报（英文版）, 2016,24(9):1161-1165. DOI： 10.1016/j.cjche.2016.04.034.

Ehsan Salehi. Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport[J]. , 2016, 24(9): 1161-1165. DOI： 10.1016/j.cjche.2016.04.034.

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中图分类号:

Abstract

Heavy metal removal from water is a great concern for environmentalists and engineers. Ion-imprinted membranes are among the state of the art technologies for selective adsorption of heavy metals from aqueous environment. Dialysis permeation of nickel ions through Ni(II)-imprinted membranes has been thermodynamically studied in our prior work. In current study

the diffusive transport model was developed and then applied for better insight into the retardation mechanisms involved in the ion-imprinted membrane transport. The Sips isotherm model was coupled with the transport model to obtain the governing equation. Chemisorption and physical interactions (bulk diffusion and pore-clogging) were the most probable retardation mechanisms according to the modeling results. Relative retardation factor (

) was also defined as; transport-rate controlled by chemical adsorption to that controlled by physical interactions. With the help of the retardation factor

it was understood that the membrane behavior gradually changes from chemisorption to

facilitated transport during permeation time. Effect of important operating parameters such as time

temperature and concentration on transport behavior was also investigated. Results indicated that chemisorption rate is rather higher at lower concentrations

early permeation times and reduced temperatures. In addition

tabulated greater values for Ni(II) compared to Co(II) due to the imprinting effect.

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