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

PMID25473981

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

N° Catalogo

Marchio

Descrizione del prodotto

216763

Sigma-Aldrich

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

H1009

Sigma-Aldrich

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

F7002

Sigma-Aldrich

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

215422

Sigma-Aldrich

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

516813

Sigma-Aldrich

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

12310

Sigma-Aldrich

Iron, ≥99%, reduced, powder (fine)

F8633

Sigma-Aldrich

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

349887

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Perossido di idrogeno, contains inhibitor, 35 wt. % in H₂O

C3518

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Carbonyl iron, ≥97% Fe basis

F8263

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

44890

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Iron, puriss. p.a., carbonyl-Iron powder, low in magnesium and manganese compounds, ≥99.5% (RT)

209309

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Iron, powder, −325 mesh, 97%

413054

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

88597

Millipore

Perossido di idrogeno, 3%, suitable for microbiology

356808

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Iron, foil, thickness 0.1 mm, ≥99.9% trace metals basis

267945

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Iron, chips, 99.98% trace metals basis

356824

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

18304

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Perossido di idrogeno, 34.5-36.5%

95321

Supelco

Perossido di idrogeno, ≥30%, for trace analysis

H3410

Sigma-Aldrich

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

16911

Supelco

Perossido di idrogeno, 30 % (w/w), for ultratrace analysis

GF45572474

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

338141

Sigma-Aldrich

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

95294

Sigma-Aldrich

Perossido di idrogeno, tested according to Ph. Eur.

GF13723758

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

GF66605856

Iron, foil, 100x100mm, thickness 0.125mm, as rolled, 99.99+%

GF62438520

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

GF93209328

Iron, tube, 200mm, outside diameter 8.0mm, inside diameter 5mm, wall thickness 1.5mm, annealed, 99.5%

GF52254233

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

GF00607070

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