Surfactant enhanced wetting and salt leaching of soil contaminated by crude oil and brine
- Soil Remediation Research, Vegreville, Alberta (Canada)
As a pre-treatment of bioremediation, leaching of salts from an agriculture top soil contaminated with crude oil and brine was inhibited by severe water repellency resulting from the large difference in surface tension between water and soil aggregates coated by crude oil. Surfactant solutions were found effective in reducing soil water repellency and improving salt leaching. An intermittent leaching procedure further improved leaching efficiency by allowing diffusion of salt from soil interpores to aggregate surface. As a result, electric conductivity (EC) of the contaminated soil was reduced from 11.8 dS cm{sup -1} to 2.6 dS cm{sup -1} when the soil was leached with a non-ionic surfactant (0.05 N, SN-70, Witco Inc.) using 1.6 L kg{sup -1} water. Dissolved hydrocarbons into the leachate was 106 mg L{sup -1} counting for 3.5% of total oil content.
- OSTI ID:
- 210511
- Report Number(s):
- CONF-9509139-; TRN: 95:008324-0376
- Resource Relation:
- Conference: 7. ACS special symposium: emerging technologies in hazardous waste management, Atlanta, GA (United States), 17-20 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Emerging technologies in hazardous waste management VII; Tedder, D.W. [ed.]; PB: 1352 p.
- Country of Publication:
- United States
- Language:
- English
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