Environmentally friendly system for the degradation of multipesticide residues in aqueous media by the Fenton’s reaction

Environmentally friendly system for the degradation of multipesticide residues in aqueous media by the Fenton’s reaction

A Fenton oxidation system employing zero-valent iron (whose source was swarf, a residue of metallurgical industries, in powder form) and hydrogen peroxide for the treatment of an aqueous solution with six pesticides was developed, and the effect of the iron metal content, pH, and hydrogen peroxide c...

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Bibliographic Details
Published in:Environmental science and pollution research international Vol. 21; no. 1; pp. 584 - 592
Main Authors: de S. Guimarães, Bruno, Kleemann, Natiele, Caldas, Sergiane S., Costa, Fabiane P., Silveira, Maria A. K., Duarte, Fabio A., Primel, Ednei G.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 2014
Springer Nature B.V
Subjects:
Aquatic Pollution
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Biodegradation
Bioremediation
Carbon
Degradation
Dissolution
Dissolved organic carbon
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental degradation
Environmental Health
Gas flow
Green Chemistry Technology - methods
Hydrogen peroxide
Hydrogen Peroxide - chemistry
Iron
Iron - chemistry
Metal concentrations
Mineralization
Organic contaminants
Oxidation
Oxidation-Reduction
Pesticide Residues - analysis
Pesticide Residues - chemistry
Pesticides
pH effects
Pollutants
Research Article
Studies
Swarf
Systems (metallurgical)
Turbidity
Waste Water Technology
Water Management
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - chemistry
Water pollution
Water Pollution Control
Brazil
Multipesticide degradation
Fenton’s reaction
Environmentally friendly system
Zero-valent iron
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Summary:A Fenton oxidation system employing zero-valent iron (whose source was swarf, a residue of metallurgical industries, in powder form) and hydrogen peroxide for the treatment of an aqueous solution with six pesticides was developed, and the effect of the iron metal content, pH, and hydrogen peroxide concentration was evaluated. The characterization of the aqueous solution resulted in: pH 5.6, 105 mg L −1 of dissolved organic carbon, and 44.6 NTU turbidity. In addition, the characterization of the swarf by FAAS and ICP-MS showed 98.43 ± 7.40 % of zero-valent iron. The removal was strongly affected by the content of iron metal, pH, and hydrogen peroxide concentration. The best degradation conditions were 2.0 g swarf, pH 2.0, and 5 mmol L −1 H 2 O 2 . At the end of the treatment, the pesticide degradation ranged from 60 to 100 %, leading to 55 % mineralization. Besides, all hydrogen peroxide was consumed and the determination of total dissolved iron resulted in 2 mg L −1 . Thus, the advantages of this system are rapid degradation (up to 20 min), high-degradation rates, simple handling, and low cost. Figure A Fenton oxidation system employing Fe 0 (in which the source of Fe 0 was swarf, a residue in powder form of metallurgical industries) and H 2 O 2 for the degradation of synthetic wastewater comprising six pesticides was developed, and the effect of the amount of Fe 0 , pH, and H 2 O 2 concentration was evaluated.
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ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-013-1932-2