title: Effects of the steric hindrance of micropores in the hyper-cross-linked polymeric adsorbent on the adsorption of p-nitroaniline in aqueous solution.
abstract: A hyper-cross-linked polymeric adsorbent with "--CH2--phenol--CH2--" as the cross-linked bridge (denoted GQ-05), and another hyper-cross-linked polymeric adsorbent with "--CH2--p-cresol--CH2--" as the cross-linked bridge (denoted GQ-03) were synthesized to reveal the effect of the steric hindrance of micropores in the hyper-cross-linked polymeric adsorbent on adsorption capacity and adsorption rate of p-nitroaniline (PNA) from aqueous solution. The results of adsorption kinetics indicated the order of the adsorption rate GQ-05>GQ-03. The pseudo-first-order rate equation could describe the entire adsorption process of PNA onto GQ-05 while the equation characterized the adsorption process of GQ-03 in two stages. The order of the adsorption capacity GQ-05>GQ-03 was demonstrated by thermodynamic analysis and dynamic adsorption. The steric hindrance of micropores in the hyper-cross-linked polymeric adsorbent was a crucial factor for the order of the adsorption capacity and adsorption rate.
authors.affiliation: College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, PR China. Electronic address: xiaoguqing2005@163.com.
authors.forename: Guqing
authors.initials: G
authors.lastname: Xiao
authors.affiliation: College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, PR China.
authors.forename: Ruimin
authors.initials: R
authors.lastname: Wen
authors.affiliation: College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, PR China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Wei
authors.affiliation: College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, PR China.
authors.forename: Dan
authors.initials: D
authors.lastname: Wu
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds / Q000302:isolation & purification*; D007700:Kinetics; D011108:Polymers / Q000737:chemistry*; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000814:Aniline Compounds; D011108:Polymers; D014874:Water Pollutants, Chemical; C019498:4-nitroaniline
keywords: Adsorption; Hyper-cross-linked polymeric adsorbent; Micropore; Steric hindrance; p-Nitroaniline