NDLI: Sorption Isotherm of Rhamnolipids onto Sediment: Effect of Different Rhamnolipidic Type and Sediment Properties

Content Provider	IEEE Xplore Digital Library
Author	Yan-Ping Guo Yong-You Hu Hui Lin Jia-Ning Dai Xiao-Yu Zhang
Copyright Year	2010
Abstract	Microbe produced rhamnolipids are often mixtures containing multicomponent homologues. To understanding the rhamnolipid sorption affected by its homologue compositions is of considerable importance to its application for environmental restorations, including rhamnolipids pump-and-treat for polluted groundwater, rhamnolipids flushing to mobilize hydrophobic contaminants, as well as effects of contaminants transfer from solid to aqueous phases by such biosurfactants. In this study, the adsorption of two representative rhamnolipidic homologue fractions, RL-F1 and RL-F2, which were separated and purified from the crude extracts by Pseudomonas aeruginosa mutant strain MIG-N146, onto three sediments was comparatively investigated. Application of the Langmuir and multi-interaction isotherm models indicates that the rhamnolipidic type and the degree of their hydrophobicity created predominant influences on adsorbability. The rhamnolipid adsorption behaviors showed larger tendency to be the S-shaped multi-interaction sorption isotherm, which was mostly driven by hydrophobic interactions between the rhamnolipidic molecules. RL-F1 fraction exhibited generally much higher adsorption plateaus than that for RL-F2. It was also found that the organic carbon and clay contents were important sediment-parameters affecting sorption. These results giving insight into the sorption behavior influenced by different rhamnolipidic type and sediment properties may provide useful information for rhamnolipid application in environmental remediations.
Starting Page	1
Ending Page	4
File Size	256783
Page Count	4
File Format	PDF
ISBN	9781424447121
ISSN	21517622
DOI	10.1109/ICBBE.2010.5517702
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Industrial control Pollution control Carbon dioxide Educational technology Solids Control engineering education Capacitive sensors Rivers Sediments Biological materials
Content Type	Text
Resource Type	Article

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