Transport Characteristic of Heavy Metals in Contaminated Soil

오염된 토양층내의 중금속 이동 특성

  • 조재범 (충남대학교 환경공학과) ;
  • 현재혁 (충남대학교 환경공학과) ;
  • 정진홍 (충남대학교 환경공학과) ;
  • 김원석 (충남대학교 환경공학과)
  • Published : 1998.11.01

Abstract

This research was performed to check the transport characteristics of heavy metals in contaminated soil, that is, the influence of humic acid and phosphate on transport characteristics of heavy metals was studied. From the results of column mode experiments about heavy metal behavior, the order time to reach breakthrough and equilibrium was soil + humic acid( 20g ) > soil + humic acid ( 5 g ) > soil without Humic acid addition > soil+humic acid( 50g ). It is because the dissolved organic carbon content increased as the soil organic matter content increased. As the phosphate increased, so did the time to reach breakthrough and equilibrium. The order of time was soil + phosphate( 50 mg ) > soil + phosphate( 20 mg ) > soil . phosphate( 10 mg ) > soil without phosphate addition. It is because the phosphate ion worked as alkalinity donor and the calcium ion co-injected worked as the accelerator of coprecipitation of heavy metals.