Stabilization of cadmium contaminated soils using synthesized zeolite

摘要

This research invesigates the effect of synthesized zeolite on stabilizing Cd-contaminated soil, using 0.01 M Cacl_2 leaching solution in batch and column experiments. The zeolite was synthesized from fly ash obtained from a coal-Fired Power Plant, by adding 2 N NaOH and subjecting to 90 deg. C for 24 h. The experiment used two groups o soil samples: (1) addition of Cd to four series of background soils: Pinchen, Jente, Erlin and Chengchung; (2) actual contaminated soils from Chungsing and Tsasta sites. The result of the batch experiment indicates that the addition of zeolite reduces Cd leaching from all types of contaminated soils.