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Application of the Fenton process in the elimination of helminth eggs.

Application of the Fenton process in the elimination of helminth eggs.

Journal of water and health (2014-12-05)

Sandra Isabel Escobar-Megchún, Hugo Alejandro Nájera-Aguilar, Magaly González-Hilerio, Javier Gutiérrez-Jiménez, Rubén Fernando Gutiérrez-Hernández, María Neftalí Rojas-Valencia

ABSTRACT

This study relates to a method for evaluating the degradation efficiency of Ascaris lumbricoides eggs through a Fenton reaction, using hydrogen peroxide (H2O2) at 100, 250, and 500 mg/L, ferrous sulfate (FeSO4) at 458 mg/L Fe(2+) and pH values of 3, 4.5, and 6. The experiments were conducted according to a 3(2) experimental design, with 1:1, 3:1, and 5:1 (H2O2/Fe(2+)) molar ratios. The oxidation and flocculation stages were performed at 130 rpm during 2 hours and at 25-30 rpm during 20 min, respectively. As a result of the Fenton reaction, an average of 91.2% Ascaris lumbricoides egg degradation was achieved at pH 6 using a 500 mg/L dose of H2O2 and a 3:1 (H2O2/Fe(2+)) molar ratio. Thus, this process is an alternative for eliminating parasites that are resistant to conventional disinfection processes and significantly reduces the human health hazard they represent.

MATERIALI

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Descrizione del prodotto

Sigma-Aldrich

Perossido di idrogeno, contains inhibitor, 30 wt. % in H₂O, ACS reagent

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Perossido di idrogeno, 30 % (w/w) in H₂O, contains stabilizer

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Iron(II) sulfate heptahydrate, ReagentPlus^®, ≥99%

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Iron(II) sulfate heptahydrate, ACS reagent, ≥99.0%

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Perossido di idrogeno, 50 wt. % in H₂O, stabilized

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Iron, ≥99%, reduced, powder (fine)

Millipore

Perossido di idrogeno, 3%, suitable for microbiology

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Perossido di idrogeno, ≥30%, for trace analysis

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Iron(II) sulfate heptahydrate, BioReagent, suitable for cell culture, suitable for insect cell culture, ≥99%

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Perossido di idrogeno, contains inhibitor, 30 wt. % in H₂O, meets USP testing specifications

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Perossido di idrogeno, 34.5-36.5%

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Iron(II) sulfate heptahydrate, suitable for plant cell culture, ≥99%

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Iron, powder, −325 mesh, 97%

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Iron, chips, 99.98% trace metals basis

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Iron, wire, diam. 1.0 mm, ≥99.9% trace metals basis

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Iron, foil, thickness 0.25 mm, ≥99.99% trace metals basis

Iron, foil, 100x100mm, thickness 0.25mm, hard, 99.5%

Iron, foil, 100x100mm, thickness 0.1mm, hard, 99.5%

Iron, IRMM^®, certified reference material, 0.5 mm wire

Iron, foil, 300x300mm, thickness 0.1mm, hard, 99.5%

Iron, rod, 100mm, diameter 2.0mm, as drawn, 99.95%

Iron, rod, 50mm, diameter 40mm, as drawn, armcO« soft ingot 99.8%

Iron, rod, 200mm, diameter 25mm, as drawn, 98+%

Iron, rod, 200mm, diameter 6.35mm, as drawn, soft ingot 99.8%