Uv H2o2
Mostrando 13-24 de 764 artigos, teses e dissertações.
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13. Additions and Corrections
The degradation of a pharmaceutical mixture (gemfibrozil, hydrochlorothiazide and naproxen) by TiO2/UV-A in different aqueous matrices was evaluated. The matrix components affected the operational conditions, rate constants, and removal efficiency of the pharmaceuticals, as well as toxicity. For sewage treatment plant effluent, a TiO2 concentration three-fol
J. Braz. Chem. Soc.. Publicado em: 2020-06
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14. Matrix Effects on the Degradation of Gemfibrozil, Hydrochlorothiazide, and Naproxen by Heterogeneous Photocatalysis
The degradation of a pharmaceutical mixture (gemfibrozil, hydrochlorothiazide and naproxen) by TiO2/UV-A in different aqueous matrices was evaluated. The matrix components affected the operational conditions, rate constants, and removal efficiency of the pharmaceuticals, as well as toxicity. For sewage treatment plant effluent, a TiO2 concentration three-fol
J. Braz. Chem. Soc.. Publicado em: 2020-06
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15. Effect of Growth Parameters on the Photocatalytic Performance of TiO2 Films Prepared by MOCVD
The present study evaluated the main factors that influence the photocatalytic activity of titanium dioxide (TiO2) films grown by metalorganic chemical vapor deposition (MOCVD) at 400 and 500 °C, in different growth times. The photocatalytic behavior was analyzed by measuring the methyl orange dye degradation at different pH values. Structural and morpholog
J. Braz. Chem. Soc.. Publicado em: 2020-06
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16. Determination and Risk Assessment of Formaldehyde and Acetaldehyde in the Ambient Air of Gas Stations in Salvador, Bahia, Brazil
Formaldehyde (FA) and acetaldehyde (AA) were determined in the ambient air of five gas stations (GS) in the city of Salvador, Bahia State, Brazil, using three passive samplers exposed simultaneously for 8 h and analysis by high-performance liquid chromatography-ultraviolet detection (HPLC-UV). The concentration ranges found were 3.31-5.78 µg m−3 for FA an
J. Braz. Chem. Soc.. Publicado em: 2020-06
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17. Photocatalytic degradation of ferricyanide as synthetic gold mining wastewater using TiO2 assisted by H2O2
Abstract Ferricyanide Fe(CN) 6 3- is one of the most stable cyanometallic complexes present in the gold mining effluents. This cyanocomplex is hard to degrade by natural attenuation and generates a negative impact on aquatic environments. Although free cyanide (CN-) can be obtained by acidifying the solution, the CN- is lethal for all forms of life. The oxid
REM, Int. Eng. J.. Publicado em: 2020-03
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18. Escores Prognósticos de Mortalidade na Cirurgia Cardíaca para Endocardite Infecciosa
Resumo Filmes de TiO2 dopados com Nb podem associar propriedades como TCO (transparent conductive oxide) e super-hidrofilicidade, quando ativados por luz UV. Filmes metálicos de Ti-Nb foram depositados sobre substrato de vidro via triodo magnétron sputtering e posteriormente os filmes foram oxidados em atmosfera ambiente a 600 °C durante 1,0 h em condiç�
Arq. Bras. Cardiol.. Publicado em: 2020-03
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19. Efeito do teor de nióbio na molhabilidade de filmes TiO2:Nb
Resumo Filmes de TiO2 dopados com Nb podem associar propriedades como TCO (transparent conductive oxide) e super-hidrofilicidade, quando ativados por luz UV. Filmes metálicos de Ti-Nb foram depositados sobre substrato de vidro via triodo magnétron sputtering e posteriormente os filmes foram oxidados em atmosfera ambiente a 600 °C durante 1,0 h em condiç�
Cerâmica. Publicado em: 2020-03
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20. Antimicrobial activity of actinomycetes and characterization of actinomycin-producing strain KRG-1 isolated from Karoo, South Africa
In the present study we reported the antimicrobial activity of actinomycetes isolated from aridic soil sample collected in Karoo, South Africa. Eighty-six actinomycete strains were isolated and purified, out of them thirty-four morphologically different strains were tested for antimicrobial activity. Among 35 isolates, 10 (28.57%) showed both antibacterial a
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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21. Kaolinite/TiO2/cobalt(II) Tetracarboxymetallophthalocyanine Nanocomposites as Heterogeneous Photocatalysts for Decomposition of Organic Pollutants Trimethoprim, Caffeine and Prometryn
São Simão’s Brazilian kaolinite has been treated with titanium(IV) isopropoxide and cobalt(II) tetracarboxymetallophthalocyanine under different conditions (acidic or basic), leading, after drying at 100 ºC, to new titania-doped cobalt(II)-metallophthalocyanine/kaolinite solids. These solids were characterized by chemical analysis, powder X-ray diffract
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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22. Estudo comparativo do tingimento de malha PES/CO com água tratada com resíduo de clarificação de óleo vegetal, na forma natural e calcinada
RESUMO A indústria têxtil utiliza um grande volume de água, o que torna necessário encontrar opções mais sustentáveis para o seu uso, como a reutilização em novos tingimentos. O uso de um resíduo industrial sólido, como adsorvente, poderá ser uma alternativa para tratar o efluente têxtil. Este estudo teve como objetivo testar a viabilidade do re
Matéria (Rio J.). Publicado em: 16/09/2019
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23. Sutures modified by incorporation of chlorhexidine and cinnamaldehyde: anti-Candida effect, bioavailability and mechanical properties
Resumo Introdução Fios de suturas com antimicrobianos são uma alternativa terapêutica para o controle de infecções orais. Objetivo Incorporar Clorexidina (CHX) e Cinamaldeído (CN) em fios de sutura e avaliar o efeito anti-Candida, liberação de antimicrobianos e as propriedades mecânicas. Material e método Fios de Seda (S) e Poliglactina 910 (P)
Rev. odontol. UNESP. Publicado em: 22/08/2019
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24. Removal of Orange G Dye by Manganese Oxide Nanostructures
Two types of manganese oxide were investigated for the removal/degradation of Orange G (OG) dye in aqueous solution. One manganese oxide (pyrolusite) was obtained commercially and the other (birnessite) was prepared according to the polyol method by means of the oxidation of MnII hydroxide by H2O2. Both materials were characterized by X-ray diffraction (XRD)
J. Braz. Chem. Soc.. Publicado em: 12/08/2019