Photocatalytic activity under visible light to transform As (III) with nitrogen-doped TiO2 nano particles using urea as nitrogen source. Optimization by multivariate analysis

dc.creatorYeber, María Cristina
dc.creatorEscalona, Carla
dc.creatorNúñez, Andrés
dc.creatorMedina, Paulina
dc.date2020-10-07T21:53:19Z
dc.date2020-10-07T21:53:19Z
dc.date2018-03
dc.date.accessioned2022-10-18T12:07:45Z
dc.date.available2022-10-18T12:07:45Z
dc.identifierDesalination and Water Treatment, vol. 107 (2018) 218–222 March
dc.identifier1944-3986
dc.identifierDOI:10.5004/dwt.2018.22161
dc.identifierhttp://repositoriodigital.ucsc.cl/handle/25022009/2094
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4441729
dc.descriptionArtículo de publicación ISI
dc.descriptionArsenic (III) is a common by product of mining activity. This contaminant can have a high environmental impact because it might accumulate in the food chain and seriously affect human health. The purpose of this study is to develop a method to remove arsenic (III) using the photo catalyst TiO2-N activated by visible light. The catalyst TiO2 Degussa P-25 was doped with nitrogen in order to narrow the energy gap and to work with radiation in the visible range. A multi variable approach was used in order to optimize the removal of arsenic, varying the concentration of the catalyst and the pH, maintaining the initial concentration of As (III) in 3 mg L–1. Two optima were determined, in one of which As (III) was reduced by 96.7% at pH 2, and in the other As was reduced by 80% at pH 7. Furthermore, the toxicity of the As (III) solutions was determined using Daphnia magna before and after the photochemical treatment. Mortality in the initial concentration was 87%. After the treatment at pH 2.0, a significant reduction in toxicity was recorded, with a mortality of only 30%.
dc.languageen
dc.publisherDesalination Publications
dc.sourcehttps://www.deswater.com/vol.php?vol=107&oth=107|0|March%20|2018
dc.subjectArsenic
dc.subjectDaphnia magna
dc.subjectFTIR
dc.subjectX-ray fluorescence spectrophotometry (XRF)
dc.subjectHeterogeneous photo catalysis
dc.subjectTiO2-N
dc.subjectVisible light
dc.titlePhotocatalytic activity under visible light to transform As (III) with nitrogen-doped TiO2 nano particles using urea as nitrogen source. Optimization by multivariate analysis
dc.typeArtículos de revistas


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