Fenton degradation assisted by cyclodextrins of a high molecular weight polycyclic aromatic hydrocarbon benzo[a]pyrene

Application of vegetable oils in the treatment of polycyclic aromatic hydrocarbons-contaminated soils

“…Likewise to bioremediation, surfactant addition results in positive, negative, or no discernible effects on Fenton oxidation [132]. Both cyclodextrins [133] and vegetable oil additions [99] are able to enhance Fenton oxidation especially for HMW PAHs but the former is more costly. Other integrated technologies such as biological-chemical and physical-chemical-biological treatments which combine separation and destruction of PAHs offer better removal efficiencies Post-treatment of extracts, high-pressure equipment, soil excavation required [124,125] In situ thermal desorption No excavation required, applicable to heterogeneous soil, broad applicability Further treatment of extracts, high temperature, slow process, extraction efficiency dependent on in situ soil conditions [126] Vegetable oil extraction High extraction efficiency, environmentally friendly, ambient conditions, portable…”

Preliminary Characterizations of a Carbohydrate from the Concentrated Culture Filtrate from <i>Fusarium solani</i> and Its Role in Benzo[a]Pyrene Solubilization

“…Indeed, some other carbohydrate compounds are well known to enhance aqueous solubility of organic molecules. Thus, cyclic oligosaccharides cyclodextrins possess apolar cavities which enable them to form inclusion complexes with hydrophobic molecules [18,30]. We have recently shown by molecular modelling that the polysaccharide amylopectin present in starch also presented several hydrophobic sites suitable for BAP complexation [31].…”

“…Tubes were incubated in the dark for 24 hours. BaP fluorescence in filtrate solution was analyzed on a Perkin Elmer LS B50 spectrofluorimeter (excitation 295 nm, emission 406 nm, time integration 10 s [18]). Blanks were set up similarly in water with no filtrate added.…”

Functional Diversification of Fungal Glutathione Transferases from the Ure2p Class

“…The specific expression of PcUre2p4 and PcUre2p6 genes after PAH treatment is in accordance with the enzymatic data. PAHs are aromatic molecules that are degraded by at least three mechanisms in fungi: one uses the cytochrome P-450 system which is composed of a superfamily of monooxygenases, one uses the Fenton reaction [36], and the other uses the soluble extracellular enzymes of lignin catabolism, including lignin peroxidase (LiP), manganese peroxidase (MnP), and laccases which are nonspecific and oxidize a wide variety of organic compounds [37, 38]. However, in our conditions, no LiP or MnP activity was detected in the culture medium; we rather observed an intracellular storage of PAH in lipid vesicles as previously shown in Fusarium solani [25].…”