Photocatalysis for arsenic removal from water: considerations for solar photocatalytic reactors.

Autor: Silerio-Vázquez F; Departamento de Ingeniería Sustentable, Centro de Investigación en Materiales Avanzados, S.C. Calle CIMAV 110, Colonia 15 de mayo, C.P, 34147, Durango, México., Proal Nájera JB; Instituto Politécnico Nacional, CIIDIR-Durango, Calle Sigma 119, Fraccionamiento 20 de Noviembre II, C. P, 34220, Durango, México., Bundschuh J; UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, and School of Civil Engineering, Faculty of Health, Engineering and Sciences, University of Southern Queensland, West Street, Toowoomba, Queensland, 4350, Australia., Alarcon-Herrera MT; Departamento de Ingeniería Sustentable, Centro de Investigación en Materiales Avanzados, S.C. Calle CIMAV 110, Colonia 15 de mayo, C.P, 34147, Durango, México. teresa.alarcon@cimav.edu.mx.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Sep; Vol. 29 (41), pp. 61594-61607. Date of Electronic Publication: 2021 Sep 17.
DOI: 10.1007/s11356-021-16507-5
Abstrakt: The following work provides a perspective on the potential application of solar heterogeneous photocatalysis, which is a nonselective advanced oxidation process considered as a sustainable technology, to assist in arsenic removal from water, which is a global threat to human health. Heterogeneous photocatalysis can oxidize trivalent arsenic to pentavalent arsenic, decreasing its toxicity and easing its removal with other technologies, such as chemical precipitation and adsorption. Several lab-scale arsenic photocatalytic oxidation and diverse solar heterogeneous photocatalytic operations carried out in different reactor designs are analyzed. It was found out that this technology has not been translated to operational pilot plant scale prototypes. General research on reactors is scarce, comprising a small percentage of the photocatalysis related scientific literature. It was possible to elucidate some operational parameters that a reactor must comply to operate efficiently. Reports on small-scale application shed light that in areas where other water purification technologies are economically and/or technically not suitable, and the solar energy is available, shed light on the fact that solar heterogeneous photocatalysis is highly promissory within a water purification process for removal of arsenic from water.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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