title: Application of the Fenton process in the elimination of helminth eggs.
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.
authors.affiliation: Escuela de Ingeniería Ambiental, Facultad de Ingeniería, Edificio 3, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Colonia Lajas Maciel, C.P. 29039, Tuxtla Gutiérrez, Chiapas, México E-mail: hnajera72@hotmail.com.
authors.forename: Sandra Isabel
authors.initials: SI
authors.lastname: Escobar-Megchún
authors.affiliation: Escuela de Ingeniería Ambiental, Facultad de Ingeniería, Edificio 3, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Colonia Lajas Maciel, C.P. 29039, Tuxtla Gutiérrez, Chiapas, México E-mail: hnajera72@hotmail.com.
authors.forename: Hugo Alejandro
authors.initials: HA
authors.lastname: Nájera-Aguilar
authors.affiliation: Escuela de Ingeniería Ambiental, Facultad de Ingeniería, Edificio 3, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Colonia Lajas Maciel, C.P. 29039, Tuxtla Gutiérrez, Chiapas, México E-mail: hnajera72@hotmail.com.
authors.forename: Magaly
authors.initials: M
authors.lastname: González-Hilerio
authors.affiliation: Facultad de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Colonia Lajas Maciel, C.P. 29039, Tuxtla Gutiérrez, Chiapas, México.
authors.forename: Javier
authors.initials: J
authors.lastname: Gutiérrez-Jiménez
authors.affiliation: Departamento de Ingeniería Química y Bioquímica, Instituto Tecnológico de Tapachula, Km 2 Carretera Puerto Madero, C.P. 30700, Tapachula, Chiapas, México.
authors.forename: Rubén Fernando
authors.initials: RF
authors.lastname: Gutiérrez-Hernández
authors.affiliation: Universidad Nacional Autónoma de México, Instituto de Ingeniería, Cd. de México, C.P. 04510, México.
authors.forename: María Neftalí
authors.initials: MN
authors.lastname: Rojas-Valencia
mesh_terms: D000818:Animals; D001196:Ascariasis / Q000469:parasitology / Q000517:prevention & control*; D017164:Ascaris lumbricoides / Q000187:drug effects* / Q000254:growth & development; D004203:Disinfection / Q000379:methods*; D004305:Dose-Response Relationship, Drug; D005296:Ferrous Compounds / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000494:pharmacology*; D010063:Ovum / Q000187:drug effects; D010084:Oxidation-Reduction; D018508:Water Purification / Q000379:methods*
chemical_list: C045076:Fenton's reagent; D005296:Ferrous Compounds; C020748:ferrous sulfate; D006861:Hydrogen Peroxide; D007501:Iron