MilliporeSigma

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

Iron, foil, 4mm disks, thickness 0.38mm, hard, 99.5%
Sigma-Aldrich
Iron, ≥99%, reduced, powder (fine)
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Iron, powder, <10 μm, ≥99.9% trace metals basis
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Iron, wire, diam. 1.0 mm, ≥99.9% trace metals basis
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Iron, granular, 10-40 mesh, >99.99% trace metals basis
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Iron, foil, thickness 0.25 mm, ≥99.99% trace metals basis
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Iron, wire, diam. 1.0 mm, ≥99.99% trace metals basis
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Carbonyl iron, ≥97% Fe basis
Iron, foil, 1m coil, thickness 0.15mm, hard, 99.5%
Iron, foil, 15mm disks, thickness 0.025mm, hard, 99.5%
Iron, foil, 15mm disks, thickness 0.009mm, 99.85%
Iron, foil, 4mm disks, thickness 0.025mm, hard, 99.5%
Iron, foil, 10mm disks, thickness 0.5mm, as rolled, 99.99+%
Iron, foil, 10mm disks, thickness 0.01mm, 99.99+%
Iron, foil, 15mm disks, thickness 0.25mm, as rolled, 99.99+%
Iron, foil, 4mm disks, thickness 0.005mm, 99.85%
Iron, foil, 10mm disks, thickness 0.5mm, hard, 99.5%
Iron, foil, 10mm disks, thickness 0.01mm, 99.85%
Iron, foil, 25mm disks, thickness 0.38mm, hard, 99.5%
Iron, foil, 10mm disks, thickness 0.020mm, 99.85%
Iron, foil, 15mm disks, thickness 0.20mm, hard, 99.5%
Iron, foil, 1m coil, thickness 0.25mm, hard, 99.5%
Iron, foil, 4mm disks, thickness 0.0125mm, 99.85%
Iron, foil, 4mm disks, thickness 0.01mm, 99.99+%
Iron, foil, 2m coil, thickness 0.1mm, hard, 99.5%
Iron, foil, 15mm disks, thickness 0.0125mm, 99.99+%
Iron, foil, 25mm disks, thickness 0.075mm, as rolled, 99.99+%
Iron, foil, 4mm disks, thickness 0.05mm, as rolled, 99.99+%
Iron, foil, 4mm disks, thickness 0.006mm, 99.85%
Iron, foil, 15mm disks, thickness 0.05mm, hard, 99.5%