Performance of fluoride removal by Fe(Ⅲ)-modified resin

Abstract

Abstract: Fluoride adsorption on Fe(Ⅲ) modified macroporous sulfonic acid resins has been investigated through batch experiments. The adsorption of fluoride on Fe(Ⅲ)-modified resins is independent of pH value，and the saturated adsorption capacity increase with the increase of temperature. The adsorption thermodynamics follows the Langmuir and Freundlich isotherm. The adsorption kinetic follows Elovich kinetic and the pseudo-second-order kinetic equation. The common foreign ions in drinking water do not obviously influence on the adsorption capacity of fluoride. The adsorbent shows good dynamic performance in column experiments. Results show that the Fe-modified resins would be a promising adsorbent for fluoride removal from drinking water.

Key words: fluoride ion, adsorption, Fe(Ⅲ)-modified resin, influence factor

CLC Number:

X523

WU Cheng-cheng, TIAN Hao-ting, ZHAO Ya-ping. Performance of fluoride removal by Fe(Ⅲ)-modified resin[J]. Journal of East China Normal University(Natural Sc, 2011, 2011(6): 36-46,74.

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