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Removal of benzene from wastewater via Fenton pre-treatment followed by enzyme catalyzed polymerization
- Source :
- Water science and technology : a journal of the International Association on Water Pollution Research. 63(8)
- Publication Year :
- 2011
-
Abstract
- This study investigated the feasibility of a two-step process for the removal of benzene from buffered synthetic wastewater. Benzene is outside the scope of enzymatic removal. In order to remove it from wastewater using enzyme, its pretreatment by modified Fenton reaction was employed to generate the corresponding phenolic compounds. In the first phase, the optimum pH, H2O2 and Fe2+ concentrations and reaction time for the Fenton reaction were determined to maximize the conversion of benzene to phenolic compounds without causing significant mineralization. The pretreatment process was followed by oxidative polymerization of the phenolic compounds catalyzed by a laccase from Trametes villosa. Factors of interest for the three-hour enzymatic treatment were pH and laccase concentration. Under optimum Fenton reaction conditions, 80% conversion of the initial benzene concentration was achieved, giving a mixture containing oxidative dimerization product (biphenyl) and hydroxylation products (phenol, catechol, resorcinol, benzoquinone and hydroquinone). Enzymatic removal of biphenyl and benzoquinone was not possible but 2.5 U/mL laccase was successful in removal of the rest of the phenolic products.
- Subjects :
- inorganic chemicals
Biphenyl
Laccase
Environmental Engineering
Hydroquinone
Iron
Benzene
Resorcinol
Hydrogen Peroxide
Benzoquinone
Waste Disposal, Fluid
Polymerization
Water Purification
chemistry.chemical_compound
chemistry
Organic chemistry
Phenol
Water Pollutants, Chemical
Water Science and Technology
Waste disposal
Subjects
Details
- ISSN :
- 02731223
- Volume :
- 63
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Water science and technology : a journal of the International Association on Water Pollution Research
- Accession number :
- edsair.doi.dedup.....d731d221b4a5e22089c0056ddf9c7a8e