모델을 이용한 음식물퇴비 혼합토양에서의 Pb 흡착 및 이동성 평가

The assessment of the adsorption and movement of Pb in mixed soil with food compost using model

  • 주유연 (광운대학교 환경공학과) ;
  • 강선홍 (광운대학교 환경공학과)
  • 투고 : 2008.03.03
  • 심사 : 2008.04.10
  • 발행 : 2008.04.15

초록

Food compost, having a higher organic contents than soil, could be an alternative material to prevent the proliferation of heavy metals contamination in soil. In this study we used a convection-dispersion local equilibrium sorption model(CDE) and a two-site non-equilibrium sorption model to find the effects on the adsorption and transportation of Pb by mixing food compost with soil and we also tried to find the effect of velocity and concentration of the injected solution on the characteristics of Pb. We measured Pb concentrations in injection-liquid and in effluent, and then applied them to CXTFIT program. As a result of column experiments, some parameters(D, R, ${\beta}$, ${\omega}$) used in two-site non-equilibrium adsorption model were obtained. Characteristics of Pb adsorption and transport were analyzed using the parameters(D, R, ${\beta}$, ${\omega}$) obtained from the CXTFIT program, We could know that mixed soil with food compost showed a higher adsorption capacity from the retardation factor(R) calculated from the breakthrough curve(BTCs) of Pb. Rs of soil and mixed soil are 20.45, 37.45 respectively, indicating that the adsorption and the transportation characteristics could be accessed quantitatively by using of two-site non-equilibrium adsorption model.

키워드

과제정보

연구 과제 주관 기관 : 환경부

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