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Preliminary Study on The Development of Phosphorous Removal Process by Converter and Furnace Slags  

Lee, Seung-hwan (금오공과대학교 토목환경공학부 환경공학전공)
Jang, Jeong-hwa (금오공과대학교 토목환경공학부 환경공학전공)
Publication Information
Journal of Korean Society of Water and Wastewater / v.18, no.2, 2004 , pp. 137-144 More about this Journal
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
Phosphorus removal; converter slag; furnace slag; removal capacity; isotherm constants;
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