Effectiveness of a biosurfactant in removing weathered crude oil from subsurface beach material |
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| Institution: | 1. Department of Civil Engineering, Chu Hai College of Higher Education, Hong Kong, China;2. State Key Laboratory of Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, China;3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;4. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China;1. Deakin University, Geelong, Australia;2. School of Life and Environmental Sciences, Warrnambool Campus, Princess Hwy, Warrnambool, Victoria, Australia;3. CSIRO Agriculture, 144 North Street, Woorim, Queensland, Australia;4. Institute of Aquaculture, Stirling University, FK9 4LA Stirling, United Kingdom |
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| Abstract: | The University of Alaska Fairbanks Environmental Technology Laboratory is conducting ongoing research into the effectiveness of a biosurfactant, PES-51®, in removing weathered crude oil from beach material. A field test was conducted from 1 to 7 July 1993 in Sleepy Bay on La Touche Island in Prince William Sound. The results of chemical analysis of the beach material before and after treatment show that diesel range petroleum hydrocarbons are completely removed to levels below the detection limit of 0.5 mg kg−1. Semivolatile petroleum hydrocarbons were reduced an average of 70%. The microbial data collected indicate that no inhibition of microbial activity in sediments is caused by treatment. The numbers and activity of hydrocarbon-degrading organisms were enhanced immediately following treatment and for about a month afterwards. There was no evidence of dissolved hydrocarbons or increased microbiological activity in seawater samples, providing evidence that oil was not transported offshore during the treatment process. |
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