Advanced oxidation of benzene, toluene, ethylbenzene and xylene isomers (BTEX) by Trametes versicolor

Journal of Hazardous Materials
Elisabet ArandaF Guillén

Abstract

Advanced oxidation of benzene, toluene, ethylbenzene, and o-, m-, and p-xylene (BTEX) by the extracellular hydroxyl radicals (*OH) generated by the white-rot fungus Trametes versicolor is for the first time demonstrated. The production of *OH was induced by incubating the fungus with 2,6-dimethoxy-1,4-benzoquinone (DBQ) and Fe3+-EDTA. Under these conditions, *OH were generated through DBQ redox cycling catalyzed by quinone reductase and laccase. The capability of T. versicolor growing in malt extract medium to produce *OH by this mechanism was shown during primary and secondary metabolism, and was quantitatively modulated by the replacement of EDTA by oxalate and Mn2+ addition to DBQ incubations. Oxidation of BTEX was observed only under *OH induction conditions. *OH involvement was inferred from the high correlation observed between the rates at which they were produced under different DBQ redox cycling conditions and those of benzene removal, and the production of phenol as a typical hydroxylation product of *OH attack on benzene. All the BTEX compounds (500 microM) were oxidized at a similar rate, reaching an average of 71% degradation in 6 h samples. After this time oxidation stopped due to O2 depletion in the closed vials ...Continue Reading

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Citations

Jan 29, 2013·Environmental Science and Pollution Research International·Xuefeng LiTong Zhou
Aug 16, 2014·Journal of Hazardous Materials·Kyunghoon ChoiWoojin Lee
Mar 6, 2015·Environmental Science and Pollution Research International·Yi-Tang ChangVivian Yang
May 18, 2016·FEMS Microbiology Letters·Martin C KruegerDietmar Schlosser
Jul 5, 2016·Biotechnology Advances·Yan ChengGuanlong Yu
Jun 18, 2014·Science and Engineering Ethics·A Roger Tucker, Gerrit van Tonder
May 4, 2018·Environmental Science and Pollution Research International·Natalina DamanikArridina Susan Silitonga
May 18, 2019·Environmental Science and Pollution Research International·Zhi TangYe Tang

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