Desorption and solubilization of anthracene by a rhamnolipid biosurfactant from Rhodococcus fascians
- Authors
- Kim, Chul-Hwan; Lee, Dong Wan; Heo, Young Mok; Lee, Hanbyul; Yoo, Yeonjae; Kim, Gyu-Hyeok; Kim, Jae-Jin
- Issue Date
- Aug-2019
- Publisher
- WILEY
- Keywords
- biosurfactant-producing bacteria; desorption; marine sediment; PAHs; rhamnolipid; solubilization
- Citation
- WATER ENVIRONMENT RESEARCH, v.91, no.8, pp.739 - 747
- Indexed
- SCIE
SCOPUS
- Journal Title
- WATER ENVIRONMENT RESEARCH
- Volume
- 91
- Number
- 8
- Start Page
- 739
- End Page
- 747
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/63639
- DOI
- 10.1002/wer.1103
- ISSN
- 1061-4303
- Abstract
- The rhamnolipid biosurfactant-producing bacterium, strain SDRB-G7, was isolated from the sediment of Sindu-ri beach and identified as Rhodococcus fascians based on a phylogenetic analysis. Optimal activity, with the highest yield (2.441 g/L) and surface tension-reducing activity (24.38 mN/m), was observed when the cells were grown on olive oil as their sole source of carbon at pH 8.0. The rhamnolipid biosurfactant showed environmental stability at a variety of NaCl concentrations (2-20%) and pH values (2-12) even under acidic conditions. Of the initial anthracene, 66% was solubilized by 100% crude biosurfactant. Furthermore, 100% crude biosurfactant desorbed 81% of the anthracene in sediment into the aqueous phase. These results suggest that the rhamnolipid biosurfactant produced from R. fascians SDRB-G7 is a promising candidate for polycyclic aromatic hydrocarbon (PAH) removal from the sediment and can be an effective agent for processes that bioremediate PAHs such as surfactant-enhanced remediation. Practitioner points Biosurfactants can accelerate desorption of PAHs and improve their solubility. BS-producing R. fascians SDRB-G7 was selected by screening of biochemical tests. Solubility of anthracene was enhanced by rhamnolipid produced by strain SDRB-G7. Microbial surfactant is a promising alternative for bioremediation of PAH-polluted sites. (C) 2019 Water Environment Federation
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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