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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

Carbonyl iron, ≥97% Fe basis

Sigma-Aldrich

Iron, ≥99%, reduced, powder (fine)

Sigma-Aldrich

Iron, granular, 10-40 mesh, >99.99% trace metals basis

Sigma-Aldrich

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

Sigma-Aldrich

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

Sigma-Aldrich

Iron, powder, <10 μm, ≥99.9% trace metals basis

Iron, foil, light tested, 25x25mm, thickness 0.01mm, 99.85%

Iron, microfoil, disks, 10mm, thinness 0.15μm, specific density 176.7μg/cm², permanent mylar 3.5μm support, 99.99+%

Iron, rod, 100mm, diameter 19mm, as drawn, soft ingot 99.8%

Iron, rod, 1000mm, diameter 19mm, as drawn, soft ingot 99.8%

Iron, foil, 8mm disks, thickness 0.038mm, hard, 99.5%

Iron, foil, not light tested, 25x25mm, thickness 0.001mm, 99.85%

Iron, foil, not light tested, 100x100mm, thickness 0.004mm, 99.85%

Iron, foil, light tested, 25x25mm, thickness 0.075mm, as rolled, 99.99+%

Iron, foil, light tested, 100x100mm, thickness 0.05mm, hard, 99.5%

Iron, foil, 8mm disks, thickness 0.125mm, as rolled, 99.99+%

Iron, rod, 1000mm, diameter 9.5mm, as drawn, soft ingot 99.8+%

Iron, foil, 8mm disks, thickness 0.9mm, as rolled, 99.5%

Iron, foil, 25x25mm, thickness 0.125mm, hard, 99.5%

Iron, foil, not light tested, 25x25mm, thickness 0.005mm, 99.85%

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

Iron, rod, 150mm, diameter 6.0mm, as drawn, 99.99+%

Iron, rod, 100mm, diameter 12.7mm, as drawn, 98+%

Iron, foil, 100x100mm, thickness 1.0mm, as rolled, 99.5%

Iron, foil, 5m coil, thickness 0.038mm, hard, 99.5%

Iron, foil, 6mm disks, thickness 0.003mm, 99.85%

Iron, foil, 50mm disks, thickness 0.15mm, hard, 99.5%

Iron, foil, 6mm disks, thickness 0.015mm, 99.85%

Iron, foil, 5m coil, thickness 0.05mm, hard, 99.5%

Iron, foil, 6mm disks, thickness 0.025mm, as rolled, 99.99+%