Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/343877
Type: Artigo
Title: TiO2 and modified TiO2/Fe on photocatalytic reduction of Hg2+ using artificial and solar radiation
Author: Coelho, A. L. S.
de Almeida Neto, A. F.
Ivashita, F. F.
Lenzi, G. G.
Jorge, L. M. M.
dos Santos, O. A. A.
Abstract: Mercury is a highly hazardous water contaminant; both organic and inorganic forms are cumulatively and extremely toxic. In this context, this study describes the application of TiO2-based systems modified with 5, 8, 10 and 15 wt% Fe using the impregnation method for the photocatalytic reduction of Hg2+. Characterization of TiO2 and synthesized materials was performed by using Brunauer, Emmett and Taller area, pore diameter and pore volume, scanning electron microscopy, point zero charge, X-ray diffraction (XRD), Fourier transform infrared spectroscopy, photoacoustic and Mossbauer spectroscopy. The photocatalytic reduction of Hg2+ was performed in batch stirred tank reactor and compound parabolic collector solar photoreactor, in the presence of catalysts, under four different reaction conditions. The process of heterogeneous photocatalysis was studied in the treatment of synthetic wastewater containing mercury chloride (HgCl2) in different reaction conditions. In particular, the influence of oxygen and formic acid was analyzed. The results showed that an addition of 8% to the iron weight improved the performance of the photocatalytic titania in the reduction of Hg2+ (artificial radiation). In the presence of this catalyst, and reaction medium containing only mercuric chloride in an aqueous solution containing oxygen, Hg2+ was 100% reduced, after 3 h of reaction. However, under solar radiation, the reduction of Hg2+ obtained was 67%
Subject: Mercúrio
Country: Reino Unido
Editor: Taylor & Francis
Rights: Fechado
Identifier DOI: 10.5004/dwt.2017.21630
Address: https://www.deswater.com/vol.php?vol=97&oth=97|0|November|2017
Date Issue: 2017
Appears in Collections:FEQ - Artigos e Outros Documentos

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.