Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Preliminary Study on The Development of Phosphorous Removal Process by Converter and Furnace Slags

제강 전로 및 고로 슬래그를 이용한 인제거 기법에 관한 기초연구

  • 이승환 (금오공과대학교 토목환경공학부 환경공학전공) ;
  • 장정화 (금오공과대학교 토목환경공학부 환경공학전공)
  • Received : 2003.11.12
  • Accepted : 2004.03.02
  • Published : 2004.04.15
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Abstract

In this study, several series of experiments were conducted to investigate the phosphorus (P) removal process in slag-containing solution using furnace and converter slags. High amount of $OH^-$, $Ca^{2+}$ and alkalinity were discharged from the slags and hydroxyapatites [$Ca_5(PO_4)_3(OH)$] were kept accumulated on the surface of slag. P removal capacity of the slag decreased with the increase of slag dosage. The maximum capacity was found to be 11.25 mg/g at the converter slag. Converter slag adsorbed P more than furnace slag(about four times in average). An experimental study on the effect of pH shows that the percentage removal of P increased upto 30% at the pH range of 56 than that of above pH 8. Langmuir isotherm constants gave a better correlation than Freundlich ones. P removal amount in the presence of $NH^+_4$ was less compared to the one in the absence of $NH^+_4$. Maximum percentage reduction was 23%.

Keywords

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