Inactivation tests of Ascaris eggs (Ae) were performed using hydrogen peroxide and a Fenton type nanocatalyst supported on activated carbon (AC) (FeOx/C). Blank inactivation tests were also carried out using H2O2 and H2O2/AC as oxidation systems. The FeOx/C nanocatalyst was synthesized through a novel hybrid method developed in this work. The method is based on the incipient impregnation technique, using isopropyl alcohol as dissolvent and chelating agent of the iron salt and the ultrasonic method. The supported nanocatalyst contained 2.61% w/w of total iron and the support 0.2% w/w. Transmission electron microscopy (TEM)–energy dispersive spectrometer (EDS) images permitted verification of the presence of finely dispersed FeOx nanoparticles, with sizes ranging from 19 to 63 nm. SEM–EDS analysis and TEM images also showed good dispersion of iron oxide nanoparticles, most probably maghemite; γ-Fe2O3, able to produce hydroperoxyl radical as reported in the literature. The FeOx/C nanocatalyst-H2O2 system showed an average Ae inactivation efficiency of 4.46% Ae/mg H2O2. This value is significantly higher than the result obtained using the support-H2O2 system and H2O2 alone and it is also better than data reported for the classical Fenton process (homogeneous phase) with or without UV light.
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June 04 2013
Inactivation of Ascaris eggs in water using hydrogen peroxide and a Fenton type nanocatalyst (FeOx/C) synthesized by a novel hybrid production process Free
Ariadna A. Morales;
Ariadna A. Morales
1Instituto de Ingeniería, Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán 04510, México D.F., Mexico
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Rafael Schouwenaars;
Rafael Schouwenaars
2Facultad de Ingeniería, Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán 04510, México D.F., Mexico
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Heriberto Pfeiffer;
Heriberto Pfeiffer
3Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán 04510, México D.F., Mexico
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Rosa María Ramírez-Zamora
1Instituto de Ingeniería, Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán 04510, México D.F., Mexico
E-mail: [email protected]
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J Water Health (2013) 11 (3): 419–429.
Article history
Received:
October 29 2012
Accepted:
April 29 2013
Citation
Ariadna A. Morales, Rafael Schouwenaars, Heriberto Pfeiffer, Rosa María Ramírez-Zamora; Inactivation of Ascaris eggs in water using hydrogen peroxide and a Fenton type nanocatalyst (FeOx/C) synthesized by a novel hybrid production process. J Water Health 1 September 2013; 11 (3): 419–429. doi: https://doi.org/10.2166/wh.2013.203
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