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Research Article Open Access

Effect of Surfactants on Consolidation Characteristics of Diesel Contaminated Compacted Soil

Abstract

A study was performed to understand the consolidation behavior of diesel contaminated soils with surfactants in the laboratory. In this research locally available soil in Allahabad, U.P. (India) has been collected for testing. Sodiumlauryl sulphate and liquid organic cleaner were used as a surfactants in remediation of diesel contaminated soils. The soil was contaminated with different percentages of diesel i.e. 20 mL/kg, 40 mL/kg and 60 mL/kg by weight of dried soil, to simulate the effect of contaminant on the virgin soil. The increasing trend in compression index and coefficient of consolidation, where as decreasing trend in permeability have been observed on contamination with diesel as compared to the virgin soil. In order to decontaminate the diesel contaminated soil by soil washing technique, 4 gm/kg soil SDS and 4ml LOC in one litre of water has been used separately. After decontamination it was observed that the Max. dry density, compression index and coefficient of consolidation increases, where as permeability and optimum moisture content of soil decrease and the value of the geotechnical properties were found near to the properties of virgin soil. To compare the results an alternative method of Fourier transform infra red (FTIR) spectroscopy was carried out on laboratory virgin, contaminated and decontaminated soil samples. These results show that maximum contaminants were removed by surfactants at optimum dose.

P. Vasudeva Rao , R. K. Srivastava , R. P. Tiwari , B. Sudhakararao, K. Sivaramakrishna AND P.V.V. Satyanarayana

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