title: An experimental study on the bio-surfactant-assisted remediation of crude oil and salt contaminated soils.
abstract: The effect of bio-surfactant (rhamnolipid) on the remediation of crude oil and salt contaminated soil was investigated in this study. The experimental results indicated that there was a distinct decline of total petroleum hydrocarbon (TPH) concentration within the soil when using rhamnolipid during a remediation period of 30 days, with maximum TPH reduction of 86.97%. The most effective remediation that was observed was with rhamnolipid at a concentration of 2 CMC in soil solution, and a first-order TPH degradation rate constant of 0.0866 d(-1). The results also illustrated that salts in soil had a negative impact on TPH reduction, and the degradation rate was negatively correlated with NaCl concentration in soil solution. The analysis of soil TPH fractions indicated that there was a significant reduction of C13-C30 during the remediation process when using bio-surfactant.
authors.affiliation: SINO-Canada Research Academy of Energy and Environmental Studies, North China Electric Power University, Beijing, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Zhang
authors.forename: Jianbing
authors.initials: J
authors.lastname: Li
authors.forename: Guohe
authors.initials: G
authors.lastname: Huang
authors.forename: Weikun
authors.initials: W
authors.lastname: Song
authors.forename: Yuefei
authors.initials: Y
authors.lastname: Huang
mesh_terms: D001673:Biodegradation, Environmental; D008401:Gas Chromatography-Mass Spectrometry; D006017:Glycolipids / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D010578:Petroleum / Q000032:analysis*; D012965:Sodium Chloride / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D006017:Glycolipids; D010578:Petroleum; D012989:Soil Pollutants; D013501:Surface-Active Agents; C418382:rhamnolipid; D012965:Sodium Chloride