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 specific 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 alkali 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(l/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 actviated carbon, they could look forward to an expected economical effect.

• 김은호(동아대학교 환경공학과) | Eun-Ho Kim (Dept. of Environmental Engineering, Dong-A University)
• 김정권(동아대학교 환경공학과) | Jung-Kwon Kim (Dept. of Environmental Engineering, Dong-A University)
• 성낙창(동아대학교 환경공학과) | Nak-Chang Sung (Dept. of Environmental Engineering, Dong-A University)