چكيده به لاتين
Abstract:
It has been well established that polycyclic aromatic hydrocarbons (PAHs) and heavy metals are simultaneously present at numerous contaminated sites. A number of remediation technologies have been applied for contaminated soils. However, these technologies often are not directly applicable to fine-grain soils and sediments with low-permeability. The percentage and extent of pollutants desorption from contaminated soil with different solutions were measured in batch experiments. The present study was carried out as an assessment of various extracting solutions to evaluate suitable extracting solutions for potential use in enhanced electrokinetic remediation of low permeability soils contaminated with both heavy metals and PAHs. Surfactant solutions were found to be effective in extracting PAHs from kaolin, while citric acids and EDTA were found to be effective in extracting heavy metals from kaolin. For the removal of both heavy metals and PAHs from kaolin, a mixture of surfactant and citric acids or EDTA was tried, and it was found to be an effective strategy. Specifically, the mixture of Triton X-100 and EDTA was the most effective method for the extraction of both heavy metals and PAHs from kaolin soil.
Keywords: Desorption, Polycyclic Aromatic Hydrocarbons, Heavy metals, Surfactant, Chelants, Kaolin Soil
