| Title |
The Effect of Waste Concrete on pH of Water and Heavy Metal |
| Authors |
권이열 ; 김미경 ; 이성욱 ( Ee Yol Kwon ; Mi Kyung Kim ; Seong Uk Lee ) |
| Abstract |
On the study, the neutralization ability of acid water and the removal of heavy metals were experimentally considered with concrete obtained from dismantlement of the existing concrete structures. From the result of being contacted and reacted 0.0l00g of concrete on each on 200㎖ of nitric and sulfuric solution of pH 4.00 for 1 hour at 16℃, the pH value was obtained pH 6.69 and 6.82, respectively. For contact time, equilibrium of reaction was made in 2 hours for change of temperature, pH somewhat increased as the temperature rise. Being contacted and reacted 4.0000g of concrete in 100㎖. of heavy metal solution of 0.03M-Cu^(2+), Zn² , Ni^(2+) for 15 minutes at 15℃, the removal rate of adsorption were 98.0% in Cu^(2+), 94.9% in Ni², 66.5% in Zn^(2+). Therefore waste concrete is able to help to the neutralization of acid water and removal of heavy metals. |