Stimulated Wastewater Treatment of Estrone and its Kinetics
Mentor 1
Paul House
Location
Union Wisconsin Room
Start Date
24-4-2015 10:30 AM
End Date
24-4-2015 11:45 AM
Description
Effluent release from sewage treatment plants (STPs) into aquatic environments is of major concern because of endocrine disrupting chemicals (EDCs), pharmaceuticals, and personal care products (PPCPs). During the final stage of influent treatment, chlorine gas is used as a disinfectant to minimize harmful bacteria from entering our environment. When chlorine gas interacts with water, hypochlorous acid and hypochlorite (HOCl/OCl-) are formed and can react with chemical compounds, potentially creating more hazardous stable derivatives. / / This study focuses on the kinetic reaction of HOCl/OCl- with estrone, followed using fluorescence spectroscopy. A concentration of 0.2 mM estrone was used in each experiment and treated with 2 mM hypochlorite solution. The hypochlorite solution was added immediately before data collection was observed. The rate of formation of derivatives was found using fluorescence spectroscopy by running time and wavelength scans. / / The study’s purpose was to follow the solution’s reactions by observing a decrease in estrone fluorescence through determining a wavelength that results in a good estrone signal. Previous research showed a smooth decrease in fluorescence signal, thought to be evidence of stimulated estrone reactions, but has been difficult to replicate. Each component of the solution was tested separately checking for abnormalities; none have been found as of yet. Further research will work towards determining an appropriate wavelength to show a clear estrone signal and signals of other possible products. /
Stimulated Wastewater Treatment of Estrone and its Kinetics
Union Wisconsin Room
Effluent release from sewage treatment plants (STPs) into aquatic environments is of major concern because of endocrine disrupting chemicals (EDCs), pharmaceuticals, and personal care products (PPCPs). During the final stage of influent treatment, chlorine gas is used as a disinfectant to minimize harmful bacteria from entering our environment. When chlorine gas interacts with water, hypochlorous acid and hypochlorite (HOCl/OCl-) are formed and can react with chemical compounds, potentially creating more hazardous stable derivatives. / / This study focuses on the kinetic reaction of HOCl/OCl- with estrone, followed using fluorescence spectroscopy. A concentration of 0.2 mM estrone was used in each experiment and treated with 2 mM hypochlorite solution. The hypochlorite solution was added immediately before data collection was observed. The rate of formation of derivatives was found using fluorescence spectroscopy by running time and wavelength scans. / / The study’s purpose was to follow the solution’s reactions by observing a decrease in estrone fluorescence through determining a wavelength that results in a good estrone signal. Previous research showed a smooth decrease in fluorescence signal, thought to be evidence of stimulated estrone reactions, but has been difficult to replicate. Each component of the solution was tested separately checking for abnormalities; none have been found as of yet. Further research will work towards determining an appropriate wavelength to show a clear estrone signal and signals of other possible products. /
