Enhanced Electrokinetic Remediation of Chlorinated Pesticides

Cosolvent-enhanced electrokinetic remediation of chlorinated pesticides has yet to be explored. Few studies have shown enhancements in the transport of polycyclic aromatic hydrocarbons (PAHs) when cosolvents were used (Maturi and Reddy, 2008 Reddy and Saichek, 2003). The potential success of cosolvents depends on their ability to mobilize the HOCs and to increase the EOF. It was shown that 10% n-butylamine generated the greatest EOF, followed by 20% n-butylamine and water (Maturi and Reddy, 2008). The sorption of solvents to the soil matrix may not be as high as the surfactants, which cause a better solubilization with the same amount of electro-osmotic transport. 

Remediation of chlorinated organic compounds by using conventional electrokinetic method is limited because of the limitations of caused by desorption and solubilization. These compounds bind strongly to the soil organic matter. Therefore, very low aqueous phase concentrations are reached at equilibrium. Furthermore, low solubilities of HOCs limit the concentrations in water. Therefore, either 

Aigner EJ, Leone AD, Falconer RL. (1998). Concentrations and enantiomeric ratios of organochlorine pesticides in soils from the U.S. Corn Belt. Environmental Science and Technololy 32 1162-1168. 

Agency for Toxic Substances and Disease Registry (ATSDR). (2008). http //www.atsdr.cdc. gov/. Accessed April 10, 2008. 

Chiou CT, Peters LJ, Freed VH. (1979). A physical concept of soil-water equilibria for 

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L3 SURFACTANT-ENHANCED ELECTROKINETIC REMEDIATION OF CHLORINATED PESTICIDES... 

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