Effect of pH on Enhanced Electrokinetic Remediation of Cadmium Contaminated Soils by EDTA

Enhanced electrokinetic remediation of cadmium contaminated soils by chelating agents

Electrokinetic soil remediation by electroosmosis and ionic migration is restricted to soluble substances. At a higher pH, the soil particles sorb more heavy metals than at a lower pH and the precipitation reactions of heavy metals are promoted. Both mechanisms make heavy metals immobile, rendering cleanup more difficult and electrokinetic extraction inefficient. In this study, the effectivenes...

Electrokinetic Remediation of Mercury-contaminated Soils

A series of batch tests were conducted to investigate the relative desorption potential of mercury from kaolin and glacial till soils under the effect of three extractant agents, namely, KI, NaEDTA and NaCl (all of them with a concentration of 0.1 M). These tests were conducted under different pH conditions (within a pH range between 2 and 12). Also batch tests using deionized water were perfor...

Electrokinetic remediation of oil-contaminated soils.

This investigation was undertaken to determine the factors influencing electrokinetic remediation of soils from petroleum pollutants. The remediation method was applied in two versions: (i) static and (ii) flowing, when a sample was washed with leaching solution. It was found that all the soils studied can be purified using this technique. It was also observed that the mineral and grain-size co...

Final In - Situ Electrokinetic Remediation of Metal Contaminated Soils

Effect of Sludge Amendment on Remediation of Metal Contaminated Soils

Column-leaching and pilot-scale experiments were conducted to evaluate the use of biosolids (sewage sludges) to control the mobilization of metals from contaminated soils with smelting slags. The pilot-scale experiments using amended soils showed that Cu, Pb and Sb were retained, decreasing their concentrations from 250 g/L, 80 g/L and 6 g/L, respectively in the leachates of contaminated soi...