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• W2183635464 abstract "The aim this study was evaluated the photocatalytic degradation mediated titaniumdioxide (TiO2) for three dyes and one endocrine disruptor. The photocatalyticdegradation of two commercial textile azo dyes, respectively C.I Reactive Black 5 andC.I Reactive Red 239 has been studied. TiO2 P25 Evonik was used as catalyst andphotodegradation was carried out in aqueous solution under artificial irradiation with a125W mercury vapor lamp. The effects of the amount of TiO2 used, UV-light irradiationtime, pH of the solution under treatment, initial concentration of the azo dye andaddition of different concentrations of hydrogen peroxide were investigated. The effectof the simultaneous photodegradation of the two azo dyes was also investigated. Theother dye studied was Indigo Carmine (IC). First was investigated the decolorization ofa model water effluent containing indigo carmine dye under physical and chemicaldifferent treatments. Experiments on decolorization of the effluent containing indigodye were performed using activated carbon in the dark and under irradiation.Furthermore the effect of activated carbon/TiO2/UV was tested for the same system.The effects of parameters in the IC degradation were evaluated under artificialirradiation with a 125 W mercury vapor lamp. The effects of the amount of TiO2, pH ofthe solution, initial concentration of the dye, presence of inorganic anions, temperatureand addition of different concentrations of hydrogen peroxide were investigated. Theefficiency of three different artificial photoreactors (Reactor 1 – batch magneticallystirred reactor with 125 watts mercury vapor lamp; Reactor 2 - batch magneticallystirred reactor with 4 lamps daylight 20 watts; Reactor 3 - glass tubular continuous-flowreactor, illuminated inside by one daylight 20W lamp) were evaluated. Also, the same parameters were evaluated for batch solar experiments. Furthemore, the optimizedexperiments was performed in a solar compound parabolic collector (CPC) pilot plant inPlataforma Solar de Almeria, Espanha, under suspended and supported TiO2. IC wasspiked in several types of water such as distilled water, synthetic moderately hardfreshwater, synthetic and real secondary municipal wastewater treatment plant(MWWTP). The ecotoxicological effects of IC were evaluated for two different foodchain levels (Daphnia similis and Pseudokirchneriella subcapitata) and Eisenia andreiearthworms. Photocatalytic degradation of Bisphenol A (BPA) in waters andwastewaters in the presence of titanium dioxide (TiO2) was performed under differentconditions. Suspensions of the TiO2 were used to compare the degradation efficiency ofBPA (20 mgL-1) in batch and CPC reactors. A TiO2 catalyst supported on glass spheresbeads was prepared (sol-gel method) and used in a CPC solar pilot plant for thephotodegradation of BPA (100 µgL-1). The influence of OH•, O2•-, h+on the BPAdegradation were evaluated. Some toxicological effects of BPA and its photoproductson Eisenia andrei earthworms were evaluated." @default.
• W2183635464 created "2016-06-24" @default.
• W2183635464 creator A5049059019 @default.
• W2183635464 date "2014-01-01" @default.
• W2183635464 modified "2023-09-27" @default.
• W2183635464 title "Efeito do dióxido de titânio na decomposição fotocatalítica de substâncias persistentes no ambiente: corantes têxteis e interferentes endócrinos" @default.
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• W2183635464 hasPublicationYear "2014" @default.
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