title: A novel polar-modified post-cross-linked resin and its enhanced adsorption to salicylic acid: Equilibrium, kinetics and breakthrough studies.
abstract: Improving the surface polarity is of significance for the post-cross-linked resins to enhance their adsorption to polar aromatic compounds. In the present study, we prepared a novel polar-modified post-cross-linked PDEpc_D by the Friedel-Crafts alkylation reaction and the amination reaction, the Brunauer-Emmett-Teller (BET) surface area and pore volume increased significantly after the Friedel-Crafts alkylation reaction and the surface polarity improved greatly after the amination reaction. Batch adsorption showed that PDEpc_D possessed a much enhanced adsorption to salicylic acid as compared the precursors PDE and PDEpc as well as the non-polar post-cross-linked PDVBpc. The equilibrium data was characterized by the Freundlich model, π-π stacking, hydrogen bonding and static interaction were the possible driving forces. The adsorption was a fast process and the kinetic data obeyed the micropore diffusion model. Column adsorption-desorption experiments suggested that PDEpc_D was a potential candidate for adsorptive removal of salicylic acid from aqueous solution.
authors.affiliation: Department of Bioengineering and Environmental Science, Changsha University, Changsha 410003, China. Electronic address: wxm11@ccsu.edu.cn.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Li
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
authors.forename: Deping
authors.initials: D
authors.lastname: Guo
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
authors.forename: Yaling
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. Electronic address: jianhanhuang@csu.edu.cn.
authors.forename: Jianhan
authors.initials: J
authors.lastname: Huang
keywords: Adsorption; Polarity; Post-cross-linked resin; Salicylic acid