Stabilization of mixed heavy metals in contaminated marine sediment using steel slag

Shin, Woo-Seok; Kim, Young-Kee

Journal of Navigation and Port Research 2014;38(3):269-275.
Published online June 30, 2014.

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Stabilization of mixed heavy metals in contaminated marine sediment using steel slag

Woo-Seok Shin, Young-Kee Kim

Abstract

In this study, the adsorption efficiency of mixed heavy metals in aqueous solution was investigated using steel slag. Moreover, heavy-metal stabilization treatment of contaminated marine sediment was achieved using steel slag as stabilizing agents. Heavy metal adsorption was characterized using Freundlich and Langmuir equations. The equilibrium adsorption data were fitted well to the Langmuir model in steel slag. The adsorption uptake of heavy metals were higher in the order of Pb²⁺ > Cd²⁺ > Cu²⁺ > Zn²⁺ > Ni²⁺. The steel slage was applied for a wet-curing duration of 150 days. From the sequential extraction results, the exchangeable, carbonate, and oxides fractions of Ni, Zn, Cu, Pb, and Cd in sediment decreased by 13.0%, 6.0%, 1.3%, 17.0%, and 50.0%, respectively.

Key Words: 해양오염퇴적물 Steel Slag;Heavy metals;Adsorption;Stabilization;Capping Material;Marine Contaminated Sediment