Adsorption of salicylic acid in aqueous solution by a water-compatible hyper-cross-linked resin functionalized with amino-group

• Published in: Journal of applied polymer science 2013-03, Vol.127 (5), p.3858-3863
• Main Authors: Xiao, Gu-Qing, Li, Hua, Xu, Man-Cai
• Format: Article
• Language: English
• Subjects: adsorption; Applied sciences; Exact sciences and technology; Exchange resins and membranes; Forms of application and semi-finished materials; functionalization of polymers; General purification processes; Materials science; Pollution; Polymer industry, paints, wood; Polymers; salicylic ACID; synthesis; Technology of polymers; Wastewaters; Water treatment and pollution
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.37686

On account of the high toxicity of nitrobenzene, 1,2‐dichloroethane was used as solvent. A novel water‐compatible hyper‐cross‐linked resin functionalized with amino‐group (denoted as GQ‐04) was synthesized to remove salicylic acid (SA) in aqueous solution. The maximum adsorption capacity of SA onto GQ‐04 was observed at pH of 1.88. The adsorption capacity increased with the increasing salt concentration. The adsorption kinetic data obeyed the pseudo‐second‐order rate equation and the adsorption isotherms can be characterized by Freundlich model. The intraparticle diffusion was the main rate‐controlling step. The saturated adsorption quantity of SA was up to 119.9 mg·mL‐1 according to the dynamic adsorption at 293 K. The resin could be regenerated by the 6 BV mixed solution of 80% ethanol and 0.5 mol/L NaOH. The size matching and hydrogen bonding between GQ‐04 and SA and the micropore structure resulted in the larger adsorption capacity in comparison with XAD‐4 and H103 resin. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013