Bisphenol-A modified hyper-cross-linked polystyrene resin for salicylic acid removal from aqueous solution: Adsorption equilibrium, kinetics and breakthrough studies

Huanxiao Hu, Xiaomei Wang, Shengyong Li, Jianhan Huang, Shuguang Deng

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

In this study, a series of bisphenol-A modified hyper-cross-linked polystyrene resins labeled as HJ-L00, HJ-L02, HJ-L04, HJ-L06 and HJ-L08 were synthesized, characterized and evaluated for adsorptive removal of salicylic acid from aqueous solutions. The structural characterization results indicated that the resins possessed predominant micropores/mesopores, moderate specific surface area and a few bisphenol-A groups on the surface. All the bisphenol-A modified hyper-cross-linked resins were effective for removing salicylic acid from aqueous solutions, and sample HJ-L02 had the largest adsorption capacity. The adsorption equilibrium data were correlated by the Freundlich isotherm model, and a positive adsorption enthalpy was obtained. The kinetic data were analyzed with two diffusion models and indicated that the intra-particle diffusion was the sole rate-controlling step in the first stage. The dynamic experimental results showed that the breakthrough point of the HJ-L02 adsorbent was at 90.2. BV (bed volume, 1. BV=10mL) for a feed concentration of 500.0mg/L of salicylic acid, and 14.0. BV of 1% of sodium hydroxide could completely regenerate the HJ-L02 adsorbent column.

Original languageEnglish (US)
Pages (from-to)108-112
Number of pages5
JournalJournal of Colloid And Interface Science
Volume372
Issue number1
DOIs
StatePublished - Apr 15 2012
Externally publishedYes

Keywords

  • Adsorption
  • Hyper-cross-linked resin
  • Polystyrene
  • Salicylic acid

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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