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Heterogeneous Fenton-like oxidation of monochlorobenzene using green synthesis of iron nanoparticles
- Source :
- Journal of Colloid and Interface Science. 410:67-73
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- Iron nanoparticles (Fe NPs) were synthesized using tea extracts as a catalyst for the Fenton-like oxidation of monochlorobenzene (MCB), where 69%, 53%, and 39% of MCB were, respectively, degraded by Fe NPs synthesized using green tea extracts, oolong tea extracts, and black tea extracts. Fe NPs synthesized using green tea extracts (GT-Fe NPs) demonstrated the best degradation since green tea contains a high concentration of caffeine/polyphenols used as both reducing and capping agents in the synthesis of Fe NPs. This was confirmed by SEM image, EDS, and XRD pattern of GT-Fe NPs. In addition, batch experiments show that the oxidation of MCB and the removal of chemical oxygen demand (COD) using GT-Fe NPs were 81% and 31%, respectively, at optimal conditions, where dosages were 0.6 g/L GT-Fe NPs, 0.045 mol/L H2O2, and initial pH of 3.0. Compared to homogeneous Fenton oxidation of MCB, GT-Fe NPs as a heterogeneous catalyst indicate that Fe2+ and Fe3+ leached from GT-Fe NPs nanoparticles and consequently reduced the formation of iron sludge. Finally, GT-Fe NPs were successful in removing MCB from wastewaters, and the possible Fenton-like oxidative mechanism of MCB was proposed. The proposition was based on adsorption of MCB on the surface of GT-Fe NPs, decomposition of H2O2, generation of hydroxyl radicals, and oxidation of MCB. Refereed/Peer-reviewed
- Subjects :
- monochlorobenzene
Chemistry
green synthesis
Radical
Metallurgy
Chemical oxygen demand
Nanoparticle
Fenton-like
Heterogeneous catalysis
Decomposition
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Catalysis
Fe NPs
Biomaterials
Colloid and Surface Chemistry
Adsorption
Polyphenol
Physical Chemistry (incl. Structural
tea extracts
Nuclear chemistry
Subjects
Details
- ISSN :
- 00219797
- Volume :
- 410
- Database :
- OpenAIRE
- Journal :
- Journal of Colloid and Interface Science
- Accession number :
- edsair.doi.dedup.....1f2e566f3bb013acab503363ff7b09eb