Relation between Leaching Characteristics of the positive Ions and Phosphate Removal by granular Converter Slag for the different Conditions and Concentrations of Phosphate

인산염 농도와 폐수조건 변화에 따른 입상 전로슬래그의 양이온 용출 특성과 인산염 제거의 관계에 관한 연구

  • 이인구 (금강엔지니어링㈜ 수질환경연구팀) ;
  • 이상호 (상명대학교 환경공학과)
  • Published : 2007.04.30

Abstract

The converter slag can be used to remove phosphate ion into the form of solid state from the wastewater. This research aims to evaluate the change of pH, alkalinity, leaching of positive ion in the wastewater and the removal of phosphate from the initial condition of wastewater. The change of pH was abruptly increased upto pH 11 for the initial condition of pH from 7.0 to 8.5 fer 0.5 unit of pH. The alkalinity was steadily increased from 10 hours of reaction time not same as pH increase. The removal of phosphate was very effective till 10 hours of reaction then it was slow after that time. The positive ion, magnesium ion was leached from the concentration of 2.0 mg/L to 4.3mg/L at the reaction time of 27 hours and 36 hours. Therefore, converter slag can be used to remove the phosphate in the form of Struvite from the wastewater.

Keywords

converter slag;phosphate removal;pH dependant;leaching the positive ion