Urban wastewater treatment by using Ag/ZnO and Pt/TiO 2 photocatalysts.

Autor: Murcia Mesa JJ; Grupo de Catálisis, Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Tunja, Boyacá, Colombia. jjuliejoseane@hotmail.com., Arias Bolivar LG; Grupo de Catálisis, Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Tunja, Boyacá, Colombia., Sarmiento HAR; Grupo de Catálisis, Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Tunja, Boyacá, Colombia., Martínez EGÁ; Grupo de Catálisis, Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Tunja, Boyacá, Colombia., Páez CJ; Instituto de Ciencia de Materiales de Sevilla (ICMS), Consejo Superior de Investigaciones Científicas CSIC, Universidad de Sevilla, Américo Vespucio 49, 41092, Seville, Spain.; Departamento de Química, Universidad de Tolima, Barrio Santa Elena, Ibague, Colombia., Lara MA; Instituto de Ciencia de Materiales de Sevilla (ICMS), Consejo Superior de Investigaciones Científicas CSIC, Universidad de Sevilla, Américo Vespucio 49, 41092, Seville, Spain., Santos JAN; Instituto de Ciencia de Materiales de Sevilla (ICMS), Consejo Superior de Investigaciones Científicas CSIC, Universidad de Sevilla, Américo Vespucio 49, 41092, Seville, Spain., Del Carmen Hidalgo López M; Instituto de Ciencia de Materiales de Sevilla (ICMS), Consejo Superior de Investigaciones Científicas CSIC, Universidad de Sevilla, Américo Vespucio 49, 41092, Seville, Spain.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2019 Feb; Vol. 26 (5), pp. 4171-4179. Date of Electronic Publication: 2018 Mar 02.
DOI: 10.1007/s11356-018-1592-3
Abstrakt: In this study, the treatment of wastewater coming from a river highly polluted with domestic and industrial effluents was evaluated. For this purpose, series of photocatalysts obtained by ZnO and TiO 2 modification were evaluated. The effect of metal addition and Ti precursor (in the case of the titania series) over the physicochemical and photocatalytic properties of the materials obtained was also analyzed. The evaluation of the photocatalytic activity showed that semiconductor modification and precursor used in the materials synthesis are important factors influencing the physicochemical and therefore the photocatalytic properties of the materials obtained. The water samples analyzed in the present work were taken from a highly polluted river, and it was found that the effectiveness of the photocatalytic treatment increases when the reaction time increases and for both, wastewater samples and isolated Escherichia coli strain follow the next order Pt/TiO 2 << ZnO. It was also observed that biochemical and chemical demand oxygen and turbidity significantly decrease after treatment, thus indicating that photocatalysis is a non-selective technology, which can lead to recover wastewater containing different pollutants.
Databáze: MEDLINE
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