Enhanced electrokinetic dissolution of naphthalene and 2,4-DNT from contaminated soils

Effect of Electrokinetics on the Bioaccessibility of Polycyclic Aromatic Hydrocarbons in Polluted Soils

“…The results of bioaccessibility tests on samples of clay soil, both in the absence and presence of Brij 35, suggest that the surfactant plays an important role in the effectiveness of the electrokinetic treatment on the bioavailability of PAHs. In this sense, some studies have shown the capability of several agents, mainly surfactants, to enhance the solubilization or desorption of organic pollutants in soils in combination with electro‐osmotic flow for soil washing (Jiradecha et al, 2006; Ko et al, 2000; Reddy and Saichek, 2003, 2004; Saichek and Reddy, 2003; Yuan and Weng, 2004). Our study extends those findings by showing that this approach can also be used in certain bioremediation scenarios to promote bioaccessibility and hence biodegradation by soil microbial populations.…”

Decontamination of soils containing PAHs by electroremediation: A review

“…In his research used two field soils, loam and sandy loam and employed carboxymethyl-␤-cyclodextrin (CMCD) to remediate the laboratory spiked organic contaminants, naphthalene and 2,4-dinitrotoluene. After the electrokinetic experiments, it was determined that the CMCD enhanced electrokinetic process increased naphthalene removal to 83% [61]. Ko et al [62] carried out the removal of phenanthrene from saturated low-permeability subsurface environments using hydroxypropyl-␤-cyclodextrin (HPCD).…”

Archives of Environmental Protection

“…However, underivatized β-CD has a very low solubility of 18 g/L. To enhance its solubility, the -OH group of the cyclodextrin molecule is usually modifi ed, and hydroxypropyl-β-cycodextrin (HP-β-CD) in particular, is known to be less toxic to soil microorganisms compared to other chemical agents such as strong acids, chelating agents and surfactants (Jiradecha 2000). Toxicological studies by Gould indicate that HP-β-CD is toxicologically safe, with clear no eff ect dose levels and reversible histopathological and biochemical changes (Gould 2005).…”