title: Sorption enhancement of 1-naphthol onto a hydrophilic hyper-cross-linked polymer resin.
abstract: A hydrophilic hyper-cross-linked polymer resin NDA-150 was developed to remove 1-naphthol from the contaminated waters. The sorption performance of 1-naphthol on NDA-150 was explored and compared with that on the commercial hydrophobic resin XAD-4. The sorption rates of 1-naphthol onto both of the two resins obey the pseudo-second-order kinetics, and are limited by the successive steps of film diffusion and intraparticle diffusion. The greater sorption rate on XAD-4 than NDA-150 is probably due to the larger average pore diameter of XAD-4. All the adsorption isotherms can be represented by Langmuir equation. The larger capacity and stronger affinity of NDA-150 than XAD-4 probably result from the abundant microporous structure and polar groups of NDA-150. In aqueous phase hydrophobic XAD-4 adsorbs 1-naphthol driven principally by enthalpy change, while the adsorption onto hydrophilic NDA-150 driven mainly by entropy change. The breakthrough and the total sorption capacity of NDA-150 to 1-naphthol were obtained to be 1.10 and 1.58 mmol mL(-1) resin at 293 K, respectively. Nearly 100% regeneration efficiency for the resin was achieved by ethanol at 313 K.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, People's Republic of China. wmzhang@nju.edu.cn
authors.forename: Weiming
authors.initials: W
authors.lastname: Zhang
authors.forename: Changhong
authors.initials: C
authors.lastname: Hong
authors.forename: Bingcai
authors.initials: B
authors.lastname: Pan
authors.forename: Qingjian
authors.initials: Q
authors.lastname: Zhang
authors.forename: Peijuan
authors.initials: P
authors.lastname: Jiang
authors.forename: Kun
authors.initials: K
authors.lastname: Jia
mesh_terms: D000327:Adsorption; D004058:Diffusion; D057927:Hydrophobic and Hydrophilic Interactions; D007700:Kinetics; D009284:Naphthols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: C539488:NDA 150; D009284:Naphthols; D011108:Polymers; D011137:Polystyrenes; C029350:1-naphthol