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146 results on '"Sans, Carme"'

4. Removal of Pharmaceutically Active Compounds (PhACs) in Wastewater by Ozone and Advanced Oxidation Processes

Author

Marugán, Javier, Rodríguez-Chueca, Jorge, Esplugas, Santiago, Sans, Carme, Malato, Sixto, Barceló, Damià, Series Editor, de Boer, Jacob, Editorial Board Member, Kostianoy, Andrey G., Series Editor, Garrigues, Philippe, Editorial Board Member, Hutzinger, Otto, Founding Editor, Gu, Ji-Dong, Editorial Board Member, Jones, Kevin C., Editorial Board Member, Knepper, Thomas P., Editorial Board Member, Negm, Abdelazim M., Editorial Board Member, Newton, Alice, Editorial Board Member, Nghiem, Duc Long, Editorial Board Member, Garcia-Segura, Sergi, Editorial Board Member, Rodriguez-Mozaz, Sara, editor, Blánquez Cano, Paqui, editor, and Sarrà Adroguer, Montserrat, editor

Published
2021
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40. Identification of intermediates, acute toxicity removal, and kinetics investigation to the Ametryn treatment by direct photolysis (UV254), UV254/H2O2, Fenton, and photo-Fenton processes.

Author

de Oliveira, Dirce Martins, Cavalcante, Rodrigo Pereira, da Silva, Lucas de Melo, Sans, Carme, Esplugas, Santiago, de Oliveira, Silvio Cesar, and Junior, Amilcar Machulek

Subjects
AMETRYN, PHOTOLYSIS (Chemistry), INTERMEDIATES (Chemistry), HABER-Weiss reaction, WATER purification, TOXICITY testing
Abstract

This paper reports the degradation of 10 mg L−1 Ametryn solution with different advanced oxidation processes and by ultraviolet (UV254) irradiation alone with the main objective of reducing acute toxicity and increase biodegradability. The investigated factors included Fe2+ and H2O2 concentrations. The effectiveness of the UV254 and UV254/H2O2 processes were investigated using a low-pressure mercury UV lamp (254 nm). Photo-Fenton process was explored using a blacklight blue lamp (BLB, λ = 365 nm). The UV254 irradiation process achieved complete degradation of Ametryn solution after 60 min. The degradation time of Ametryn was greatly improved by the addition of H2O2. It is worth pointing out that a high rate of Ametryn removal was attained even at low concentrations of H2O2. The kinetic constant of the reaction between Ametryn and HO● for UV254/H2O2 was 3.53 × 108 L mol−1 s−1. The complete Ametryn degradation by the Fenton and photo-Fenton processes was observed following 10 min of reaction for various combinations of Fe2+ and H2O2 under investigation. Working with the highest concentration (150 mg L−1 H2O2 and 10 mg L−1 Fe2+), around 30 and 70% of TOC removal were reached within 120 min of treatment by Fenton and photo-Fenton processes, respectively. Although it did not obtain complete mineralization, the intermediates formed in the degradation processes were hydroxylated and did not promote acute toxicity of Vibrio fischeri. Furthermore, a substantial improvement of biodegradability was obtained for all studied processes. [ABSTRACT FROM AUTHOR]

Published
2019
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50. Ozone/H 2 O 2 Performance on the Degradation of Sulfamethoxazole.

Author

Martins, Rui C., Dantas, Renato F., Sans, Carme, Esplugas, Santiago, and Quinta-Ferreira, Rosa M.

Subjects
SULFAMETHOXAZOLE, OZONIZATION, EMERGING contaminants, ANTIBACTERIAL agents, WATER quality monitoring
Abstract

This work aims to analyze the contribution of H2O2on ozonation of Sulfamethoxazole (SMX). A single ozonation was able to totally remove SMX. TOC and COD depletion rates after a transferred ozone dose of 60 mg/L was related to the formation and decomposition of H2O2. An increase on O3gas inlet concentration from 10 g/m3to 20 g/m3improved COD abatement from 11% to 36%. When the presence of H2O2at the beginning of ozonation was tested, it was verified that COD and TOC degradation were enhanced, attaining maximum values of 76% and 32%, respectively, when compared with 35% and 15% reached in a single ozonation. [ABSTRACT FROM PUBLISHER]

Published
2015
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