MICROSCOPIC RANGE OF IMMOBILIZATION BETWEEN HEAVY METALS AND AMENDMENT IN SOIL THROUGH WATER MIGRATION

Abstract

In order to identify the microscopic range of immobilization in soil, the pot test was conducted
to evaluate the distance that lead (Pb) and antimony (Sb) transport through water migration and the transport
phases during immobilization. The amount of amendment required to immobilize Pb and Sb was investigated
on the basis of the microscopic range of immobilization. The results clearly showed that Pb and Sb were
transported a maximum of 5 mm and 6 mm, respectively, through water migration which corresponded to
precipitation for one month. Both metals were accumulated 1 mm from contaminated soil. The primary Pb
transport phase was sorbed on Fe/Mn oxide, while that of Sb was water-soluble. The amount of amendment
required for Pb and Sb immobilization was estimated to be 4.62% (w/w) from the microscopic range of
immobilization (1 mm).