A Study on Recycle of Waste Concretes for Neutralization and Removal of Heavy Metals ( I )

페콘크리트의 중화 및 중금속 제거를 위한 재활용에 관한 연구 (I)

  • Kim, Eun-Ho (Dept. of Environmental Engineering,Dong-A University) ;
  • Kim, Jung-Kwon (Dept. of Environmental Engineering,Dong-A University) ;
  • Sung, Nak-Chang (Dept. of Environmental Engineering,Dong-A University)
  • Published : 1997.10.01

Abstract

This study was performed to Investigate the utilization of waste concretes for neutralization and removal of heavy metals In plating wastewater, because waste concretes have been known to be very porous, to have high species surface area and to have alkaline minerals such as calcium. The results obtained from this research showed that waste concretes had a buffer capacity to neutralize an acidic alali system in plating wastewater. Generally, neutralization and removal rate of heavy metals were excellent in the increase of waste concrete amounts and a small size. Because a coefficient of correlation was high, it seemed that removal of heavy metals could be explained by Freundlich and Langmuir isotherms. If we reflected the adsorption capacity(k) and adsorption intensity(1/n) of Freundlich isotherm, we couldn't consider waste concretes as a good adsorbent. But, we could know that waste concretes were capable of removing a part of heavy metals. In point of building waste debris, if waste concretes substituted for a valuable adsorbent such as actuated carbon, they could look forward to an expected economical effect.

Keywords

waste concretes;neutraization;heavy metals;platting wastewater

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