Abstract：
:We studied the possibility to re-use an aqueous solution of methyl-beta-cyclodextrin (bpmCD) in order to decontaminate a soil polluted by phenanthrene and pyrene. The loss of bpmCD in the soil was insignificant. In order to eliminate polycylic aromatic hydrocarbons (PAHs) from the contaminated aqueous solution, on one hand we tested their photodegradation using TiO(2) suspensions. But it was inefficient, because of the stabilisation of PAHs within the cavity of bpmCD. On the other hand, we removed PAHs by liquid-liquid extraction with colza oil. This allowed the regeneration of cyclodextrins, by concentrating the pollutants in the organic phase with a small loss of carrier. Contaminated soils were almost completely de-polluted after 2d of re-circulation, using a 10mM solution of bpmCD. To reduce the amount of bpmCD loss in the oil phase, we set the fraction of colza oil low, by using a micro-emulsion or by impregnating an organic membrane with the oil. We found this last possibility more interesting.
journal_name
Chemospherejournal_title
Chemosphereauthors
Petitgirard A,Djehiche M,Persello J,Fievet P,Fatin-Rouge Ndoi
10.1016/j.chemosphere.2009.01.072subject
Has Abstractpub_date
2009-05-01 00:00:00pages
714-8issue
6eissn
0045-6535issn
1879-1298pii
S0045-6535(09)00138-6journal_volume
75pub_type
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