title: Fenton (H2O2/Fe) reaction involved in Penicillium sp. culture for DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane)] degradation.
abstract: The purpose of this work was to demonstrate that a Fenton (H(2)O(2)/Fe) reaction was involved in DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane)] degradation in a culture of Penicillium sp. spiked with FeSO(4). A commercial DDT mixture (10% DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene], 30% o,p-DDT and 60% of p,p' -DDT) of 10 mg L(-1) was used. Hydrogen peroxide (H(2)O(2)), tartaric acid and oxalic acid were identified at 18 h in culture media, with and without added DDT; this correlated positively with lowering of pH from 5.8 to 2.7. Lower concentrations of oxalic acid and H(2)O(2) (7.9 and 52.6 mg L(-1), respectively) occurred in media with DDT at 30 h, in comparison to that one without DDT mixture (27.9 and 65.3 mg L(-1), respectively), at this time there was maximum degradation (87.7, 91.7 and 94.2%) for DDE, o,p-DDT and p,p'-DDT, respectively. We propose that the degradation of the DDT mixture by Penicillium sp. was through a Fenton reaction (H(2)O(2)/Fe) under acidic conditions produced in situ during the fungal culture amended with FeSO(4).
authors.affiliation: Departament of Biotechnology and Bioengineering, Center of Research and Advanced Studies of the National Polytechnic Institute, México.
authors.forename: Cecilia
authors.initials: C
authors.lastname: Izcapa-Treviño
authors.forename: Octavio
authors.initials: O
authors.lastname: Loera
authors.forename: Araceli
authors.initials: A
authors.lastname: Tomasini-Campocosio
authors.forename: Fernando
authors.initials: F
authors.lastname: Esparza-García
authors.forename: Juan A
authors.initials: JA
authors.lastname: Salazar-Montoya
authors.forename: María D
authors.initials: MD
authors.lastname: Díaz-Cervantes
authors.forename: Refugio
authors.initials: R
authors.lastname: Rodríguez-Vázquez
mesh_terms: D000818:Animals; D001431:Bacteriological Techniques; D001673:Biodegradation, Environmental; D018533:Biomass; D002849:Chromatography, Gas; D003634:DDT / Q000378:metabolism*; D005290:Ferric Compounds / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007306:Insecticides / Q000378:metabolism*; D007501:Iron / Q000737:chemistry*; D019815:Oxalic Acid / Q000032:analysis / Q000737:chemistry; D010407:Penicillium / Q000254:growth & development* / Q000378:metabolism*; D013644:Tartrates / Q000032:analysis / Q000737:chemistry; D013997:Time Factors
chemical_list: C045076:Fenton's reagent; D005290:Ferric Compounds; D007306:Insecticides; D013644:Tartrates; C024823:ferric sulfate; D019815:Oxalic Acid; D006861:Hydrogen Peroxide; D003634:DDT; C016340:o,p'-DDT; D007501:Iron; C029768:tartaric acid