LONG-TERM LEACHING BEHAVIOR OF HEAVY METALS FROM A MIXTURE OF STEEL SLAG AND HUMIC ACID

Abstract

 Beneficial utilization of steel slag as an environmental remediation material of seawater damages by mixing with humic acid has been expected. To achieve it, environmental impact of the slag is required interms of leaching behavior of heavy metals.
 This research applied a seawater leaching test by shaking and immersing the slag with humic acid. Furthermore, based on the concept of environmental safety quality required in the sea-area utilization, applicability of the slag is discussed. Experimental results showed that by the interaction of steel slag and humic acid, concentration of Cd, Pb, Cr and B decreased and could meet the environmental safety quality criteria. In conclusion, the possibility that the mixture of steel slag and humic acid cause sea-environment pollution proved to be significantly low.