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title Treatment of real industrial wastewaters through nano-TiO2 and nano-Fe2O3 photocatalysis: case study of mining and kraft pulp mill effluents
authors Nogueira, V; Lopes, I; Rocha-Santos, TAP; Goncalves, F; Pereira, R
author full name Nogueira, V.; Lopes, I.; Rocha-Santos, T. A. P.; Goncalves, F.; Pereira, R.
title Treatment of real industrial wastewaters through nano-TiO2 and nano-Fe2O3 photocatalysis: case study of mining and kraft pulp mill effluents
nationality internacional
language English
document type Article
author keywords kraft pulp mill effluent; mining effluent; nano-TiO2 and nano-Fe2O3; photocatalysis; wastewater treatment
abstract High quantities of industrial wastewaters containing a wide range of organic and inorganic pollutants are being directly discharged into the environment, sometimes without proper treatment. Nanotechnology has a tremendous potential improving the existing treatments or even develop new treatment solutions. In this study, nano-TiO2 or nano-Fe2O3 was used for the photocatalytic treatment of kraft pulp mill effluent and mining effluent. The experiments with the organic effluent lead to reduction percentages of 93.3%, 68.4% and 89.8%, for colour, aromatic compounds and chemical oxygen demand, respectively, when treated with nano-TiO2/H2O2/UV and nano-Fe2O3/H2O2/UV, at pH 3.0. Significant removal of metals from the mining effluent was recorded but only for Zn, Al and Cd, the highest removal attained with 1.0gL(-1) of nano-TiO2/UV and nano-Fe2O3/UV. Regarding the toxicity of the organic effluent to Vibrio fischeri, it was reduced with the treatments combining the oxidant and the catalyst. However, for the inorganic effluent, the best reduction was achieved using 1.0gL(-1) of catalyst. In fact, the increase in dose of the catalyst, especially for nano-TiO2, enhanced toxicity reduction. Our results have shown that the use of these NMs seemed to be more effective in the organic effluent than in metal-rich effluent.
author address [Nogueira, V.; Pereira, R.] Univ Porto, Dept Biol, Fac Sci, Rua Campo Alegre, P-4169007 Porto, Portugal; [Nogueira, V.; Pereira, R.] Univ Porto, Res CIIMAR CIMAR, Rua Bragas 289, P-4050123 Porto, Portugal; [Lopes, I.; Goncalves, F.] Univ Aveiro, Dept Biol, Aveiro, Portugal; [Lopes, I.; Rocha-Santos, T. A. P.; Goncalves, F.] Univ Aveiro, CESAM Ctr Environm & Marine Studies, Aveiro, Portugal; [Rocha-Santos, T. A. P.] Univ Aveiro, Dept Chem, Aveiro, Portugal
reprint address Nogueira, V (reprint author), Univ Porto, Dept Biol, Fac Sci, Rua Campo Alegre, P-4169007 Porto, Portugal.; Nogueira, V (reprint author), Univ Porto, Res CIIMAR CIMAR, Rua Bragas 289, P-4050123 Porto, Portugal.
e-mail address veronica.nogueira@fc.up.pt
researcherid number Scientific output, CIIMAR/E-5122-2012; Rocha-Santos, Teresa/A-2355-2009
orcid number Scientific output, CIIMAR/0000-0001-6270-2153; Rocha-Santos, Teresa/0000-0003-3660-4116; Goncalves, Fernando J. M./0000-0002-9326-187X
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cited reference count 54
times cited 1
total times cited count (wos, bci, and cscd) 1
publisher city ABINGDON
issn 0959-3330
29-character source abbreviation ENVIRON TECHNOL
iso source abbreviation Environ. Technol.
year published 2018
volume 39
issue 12
beginning page 1586
ending page 1596
digital object identifier (doi) 10.1080/09593330.2017.1334093
subject category 11
document delivery number Environmental Sciences
unique article identifier Environmental Sciences & Ecology
link https://doi.org/10.1080/09593330.2017.1334093