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Degradation of FBL Dye and Disinfection of *** by the Photocatalysts of TiO2 and Ag-TiO2

Degradation of FBL Dye and Disinfection of *** by the Photoc...

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中国颗粒学会超微颗粒专委会2011年年会暨第七届海峡两岸超微颗粒学术研讨会

作者： Robert Liu Ruth Yeh yungtse hung Department of Chemical and Materials Engineering Minghsin University of Science and TechnologyHsin-ChuTaiwan Department of Civil Engineering Cleveland State UniversityClevelandOhioU.S.A.

Preparation of photocatalysts of TiO and Ag-TiO was carried out by coprecipitation *** degradation of simulated dye wastewater(FBL, Everdirect supra turguoise blue) was studied and compared by solar irradiation using prepared TiO and Ag-TiO *** disinfection of ***,an model indicator organisms for the safe water supply,was also investigated by TiO and Ag-TiO under different light *** solar degradation of FBL dye showed that the color removal percentage(ADMI removal%,American Dye Manufacturing Institute) for both photocatalysts were quite close,95-96%and TOC(total organic carbon) removal percentages were 88%for TiO and 74%for *** silver doped TiO showed faster initial reaction *** initial rate constants(min) for TiO were 1.86 for the study of TOC removal and 1.72 for ADMI removal while those for Ag-TiO were 2.01 for the study of TOC removal and 2.64 for ADMI *** to the inactivation of ***,the treatment efficacy would be:UV/Ag-TiO;visible/Ag-TiO;dark/Ag-TiO;UV(all 100%)>UV/TiO(99%)>visible/TiO(96%)>dark/TiO (87%)>visible(23%)>dark(19%).The disinfection efficiency by their corresponding kinetic initial rate constants(min) would be:UV/Ag-TiO;visible/Ag-TiO (both 6.67)>UV(6.6)>dark/Ag-TiO(6.56)>UV/TiO(1.62)>visible/TiO (1.08)>dark/TiO(0.7)>visible(0.28)>dark(0.03).The application of TiO doped with silver strongly improved the disinfection *** Langmuir-Hinshelwood kinetic model(L.-***) can also be applied for the solar degradation of FBL dye wastewater by using Ag-TiO as photocatalyst.

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