Ex-situ removal of crude oil from a contaminated soil using Sodium Dodecyl Sulfate (SDS)

Subject Areas : Environmental pollutions (water, soil and air)

Mehdi  Hosnani ¹ (Masters Student in Chemical Engineering, Department of Chemical Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran)
Hossein  Amani ² (- Assistant Professor, Department of Chemical Engineering, University of Babol, Babol, Iran* (Corresponding author))
Mohammad Reza  Sarmasti Emami ³ (- Assistant Professor, Department of Chemical Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran)

Received: 1970-01-01 Accepted : 1970-01-01 Published : 1970-01-01

Keywords: Contaminated Soil, crude oil, Soil washing, Surfactant, Removal efficiency,

Abstract :

Background Objective: Soil is the basic component of environment and the main source of food production and its contamination can cause pose many challenges for humans and other living organisms. Although many studies have been done separately to eliminate organic pollutants such as benzene and phenolic compounds from soil, a few studies yet have been done on the removal of crude oil which contains different types of hydrocarbon compounds from the soil. The aim of this study is to determine the removal of crude oil from the soil and provide a comprehensive model. Method: In this study, the ex-situ soil washing method with surface active agent has been used to remove crude oil from soil. For this purpose, first, the soil was artificially polluted with crude oil and then the effects of various parameters such as surfactant concentration in aqueous solutions, the initial concentration of contaminant in the soil, pH, volume of detergent solution, stirring rate, duration of the process and system temperature were evaluated. Findings: The results showed the optimal conditions for the removal of crude oil were concentration of surfactant in aqueous solution of 0.5% (w/w), initial concentration of crude oil of 5% (w/w), detergent solution pH=11, detergent solution volume of 50 ml, stirring rate of 200 rpm, experiment duration of 15 m and temperature of 45 °C. In optimal condition, about 96% of crude oil was removed from the soil. Discussion and Conclusion: According to the obtained results, surfactants can be used as a proper substance to remove oil contaminants from soil with a good efficiency.

References:

 

Reference

1. Von Lau, E., Gan, S., Ng, H.K., Poh, P.E., 2014. Extraction agents for the removal of polycyclic aromatic hydrocarbons (PAHs) from soil in soil washing technologies. Environmental Pollution, Vol. 184, pp.640-649.


2. Mao, X., Jiang, R., Xiao, W., Yu, J., 2015. Use of surfactants for the remediation of contaminated soils: a review. Journal of hazardous materials, Vol. 285, pp.419-435.


3. Schaumann, G.E., Thiele-Bruhn, S., 2011. Molecular modeling of soil organic matter: Squaring the circle? Geoderma, Vol.66, pp.1-14.


4. Mulligan, C.N., Eftekhari, F., 2003. Remediation with surfactant foam of PCP-contaminated soil. Engineering Geology, Vol.70, pp. 269–279.


5. Rios, L.E., David, M., Vazquez-Arenas, J., Anderson, W.A., 2013. Use of surfactants and blends to remove DDT from contaminated soils. Canadian Journal of Chemical Engineering, Vol. 91, pp. 238–244.


6. Davezza, M., Fabbri, D., Prevot, A.B., Pramauro, E., 2011. Removal of alkylphenols from polluted sites using surfactant-assisted soil washing and photocatalysis. Environmental Science and Pollution Research, Vol. 8, pp. 783–789.


7. Urum, K., Pekdemir, T., Çopur, M. 2004. Surfactants treatment of crude oil contaminated soils. Journal of Colloid and Interface Science, Vol.276, pp 456–464.


8. Urum, K., Pekdemir, T., Çopur, M., 2003. Optimum Conditions for Washing of Crude Oil Contaminated Soil with Biosurfactants Solutions. Process Safety and Environmental Protection,Vol.81, pp. 203-209.


9. Peng, S., Wu, W., Chen, J., 2011. Removal of PAHs with surfactant-enhanced soil washing: influencing factors and removal effectiveness. Chemosphere, Vol.82, pp.1173-1177.


10. Gitipour, S., Narenjkar, K., Farvash, E.S., Asghari, H., 2014. Soil flushing of cresols contaminated soil: application of nonionic and ionic surfactants under different pH and concentrations. Journal of Environmental Health Science and Engineering, Vol.12, pp.1-6.

1. Bhandari, A., Novak, J.T., Dove D.C., 2001. Effect of soil washing on petroleum hydrocarbon distribution on Sand Surface, Hazardous Substance Research, Vol. 67, pp. 148-161.

12. Shah, S.S., Jamroz, N. U., Sharif, Q. M., 2001. Micellization parameters and electrostatic interactions in micellar solution of sodium dodecyl sulfate (SDS) at different temperatures. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol.178, pp.199-206.


13. Kang, K. H., Kim, H., Lim, K., 2001. Effect of temperature on critical micelle concentration and thermodynamic potentials of micellization of anionic ammonium dodecyl sulfate and cationic octadecyl trimethyl ammonium chloride. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol.189, pp. 113-121.