Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Adsorption Removal of Phosphate from Aqueous Solution by Olivine

감람석을 이용한 인의 흡착제거 특성

  • Lee, Yong-Hwan (Department of Civil and Environmental Engineering, Jeonnam Provincial College) ;
  • Yim, Soo-Bin (Department of Environmental Engineering, Kyungsung University)
  • 이용환 (전남도립대학 토목환경과) ;
  • 임수빈 (경성대학교 환경공학과)
  • Received : 2011.05.25
  • Accepted : 2011.06.22
  • Published : 2011.07.30
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Abstract

This study was performed to investigate the removal characteristics of phosphate by adsorption on olivine, which is generated as industrial by-products from quarry. The adsorption of phosphate on olivine was significantly achieved within 1 hour and equilibrated after 3 hours. The adsorption capacity of phosphate was enhanced with decreasing pH. The maximum adsorption capacity was observed to be 0.463 mg/g in the condition of pH 3. The $Ca^{2+}$ and $Mg^{2+}$ ion amount per adsorbent eluted from olivine was increased with decreasing pH. The precipitation test showed that phosphate in aqueous phase under the condition of pH 3 ~ 9 could be eliminated largely by adsorption on olivine, not precipitation. Freundlich adsorption model were successfully applied to describe the adsorption behavior of phosphate on olivine. The $q_m$ of Langmuir adsorption model were 1.3369 mg/g, 1.0544 mg/g, 1.0288 mg/g at pH 3, 6 and 9, respectively. The $K_F$ of Freundlich adsorption model were 0.4247 mg/g, 0.3399 mg/g, 0.2942 mg/g at pH 3, 6 and 9, respectively. The olivine showed high feasibility as a adsorbent for the removal of $PO_4$-P.

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References

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