Adsorption of bisphenol A onto cationic-modified zeolite

Hong-Yu Wang, H Zhang , Jia-Qian Jiang, X. Ma

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Abstract

This paper concerns with the adsorption of bisphenol-A (BPA) by modified zeolites which were prepared using an orthogonal experimental design. The preparation process was optimized by the defined conditions, i.e. that 10% of cetyltrimethyl ammonium bromide was used as the optimal modifier and processing time and temperature were 36 h and 25°C, respectively. The adsorption equilibrium of BPA onto the modified zeolite fits the Freundlich isotherm with a high correlation coefficient 0.996 and was defined by a second-order rate constant (Kv) of 1.07 g (mg h)-1. Furthermore, the effects of solution chemical properties on the adsorption of BPA by modified zeolites were examined. The result reveals that the best adsorption temperature was 25°C, and the optimal pH ranged from 5.0 to 10.0. In addition, the adsorption capacity of BPA increased with concentrations of and decreased with increasing in concentrations of , OH-, and Al3+ in the test solution.
Original languageEnglish
JournalDesalination and Water Treatment
Early online date13 Apr 2016
DOIs
Publication statusPublished - 2016

Keywords

  • bisphenol A
  • environmental chemistry
  • adsorption

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