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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.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

硫酸铁(II) 七水合物, ACS reagent, ≥99.0%

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过氧化氢溶液, 3%, suitable for microbiology

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过氧化氢溶液, 34.5-36.5%

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铁, ≥99%, reduced, powder (fine)

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过氧化氢溶液, contains ~200 ppm acetanilide as stabilizer, 3 wt. % in H₂O

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过氧化氢溶液, 30% (w/w), puriss. p.a., reag. ISO, reag. Ph. Eur.

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羰基铁, ≥97% Fe basis

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

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铁, rod, 200mm, diameter 2.0mm, as drawn, 99.99+%

铁, rod, 50mm, diameter 5.0mm, as drawn, 99.99+%

铁, wire reel, 5m, diameter 0.025mm, as drawn, 99.99+%

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

铁, foil, 300x300mm, thickness 0.38mm, hard, 99.5%

铁, foil, 100x100mm, thickness 1.5mm, as rolled, 99.5%

铁, foil, 10mm disks, thickness 0.01mm, 99.85%

铁, foil, 10mm disks, thickness 0.01mm, 99.99+%

铁, foil, 10mm disks, thickness 0.020mm, 99.85%