| Summary: | 碩士 === 國立中正大學 === 化學工程研究所 === 100 === This study is to investigate the decolorization of biomass wastewater using a variety of processes, TiO2 nanoparticles was employed to act as a role of decolorization and photoelectrochemical hydrogen evolution using biomass wastewater. The decolorization of biomass wastewater was investigated under Xenon light irradiation in the presence of TiO2 and H2O2 under different conditions. The result of UV-vis spectrum and the component analysis of biomass wastewater showed that, in UV/TiO2 process, TiO2 primarily reacted with organic compounds with low molecular weight in wastewater; while H2O2 mainly reacted with proteins and amino acids, which are the main components of the wastewater. The true color of biomass wastewater met the effluent standards after reaction for 7 days.
With SEM, XRD, TGA and UV-vis analysis, TiO2 nanoparticles were confirmed as a mixture phases of anatase and rutile after calcination at 350℃-550℃. The band gap of TiO2 nanoparticles was about 3.0 eV. The synthesized TiO2 nanoparticles were then prepared as a work electrode to evaluate the efficiency of hydrogen evolution in methanol solution. It was found that the as prepared TiO2 containing 27% rutile exhibited the highest efficiency.
Hydrogen evolution and decolorization were combined using photoelectrochemical process with biomass wastewater. The TiO2 nanoparticles calcinated at 500℃ were used as the working electrode and H2O2 were employed in to the solution. The result indicated that, with the presence of H2O2, the amount of hydrogen evolution was increased, and the biomass wastewater was decolorized.
|
|---|
