Surfactant Enhanced Removal of Cu (II), Cd (II), and Pb (II) from a Sandy Soil

摘要

In the present study, surfactants with and without a chelating agent are used to remove Cu (II), Cd (II) and Pb (II) from an artificially contaminated sandy soil. SDS (sodium dodecyl sulfate) and AOT (sodium dioctyl sulfosuccinate) and Tx-100 (Triton x-100) are the surfactants selected to form extracting solutions. Batch tests indicated that replacing distilled water with SDS as the washing fluid can enhance the metal removal rates from the soil by a factor of 5.5, 28.8, and 29.1 for Cu (II), Cd (II), and Pb (II), respectively. Some results linked to interaction of these metal ions in the soil in relation to desorption and adsorption are also presented.