Sorption of hydrophobic organic compounds (HOC) in rapeseed oil bodies.
Oil-bodies are minute plant organelles (0.5-2.0microm diameter) consisting of an oil core surrounded by a phospholipid monolayer/proteinaceous membrane. Oil-bodies have been isolated from rapeseed seeds and demonstrated to constitute a novel type of micro-capsule suitable for the extraction of hydrophobic organic compounds from aqueous environments. Three hydrophobic pesticides: atrazine (2-chlor-4-ethyl-amino-6-isopropylamino-1,3,5-triazine), carbaryl (1-naphthyl methylcarbamate) and parathion (O,O-diethyl O-(4-nitrophenyl) phosphorothioate), as well as naphthalene and 2-phenylethanol were successfully extracted from aqueous solutions, with absorption in the inner oily core of OB as sorption mechanism. The OB membrane does not represent a barrier for the mass transfer of the compound towards the inner oily core of OB. Moreover, due to very high surface area to volume ratio, oil-bodies exhibit very good mass transfer properties compared with larger synthetic microcapsules or two-phase liquid-liquid extraction (LLE) techniques, which diminishes the need for strong agitation and avoids the formation of difficult to separate stable emulsions.
Boucher
J
J
Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Chemical and Biochemical Engineering, CH-1015 Lausanne, Switzerland. julien.boucher@epfl.ch
Cengelli
F
F
Trumbic
D
D
Marison
I W
IW
D000042:Absorption; D029741:Brassica rapa / Q000737:chemistry* / Q000648:ultrastructure; D002479:Inclusion Bodies / Q000737:chemistry / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010938:Plant Oils / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D010938:Plant Oils; D014874:Water Pollutants, Chemical