Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı

Control Of Endocrine Disrupting Substance In Sludge And Effluents
Nowadays, treatment plants have been increasing due to the advancing technology and industrialization throughout Turkey and the world. This situation brings along the requirement to analyze the features of the wastewater of treatment plants and treatment sludge in a more detailed way. In recent years, it has been remarkable to see studies conducted on endocrine disrupting substances in wastewaters and treatment sludge and the effects of these substances on environment and public health. Being one of the estrogenic hormones which are endocrine disrupting substances and found naturally in organisms, 17β-estradiol and estrone is highly important for ecological balance.
This study investigates removal methods for endocrine disrupting substances found in tail water of treatment plants in large amounts following the determination of the current situation of 17β-estradiol and estrone. To that end, in the thesis study; estrogenic hormones (17β-estradiol and estrone) are analyzed by means of the samples taken from drinking water springs and influent-tail waters of treatment plants and the current situation is determined. Then, adsorption and ozonizing studies for the removal of estrogenic hormones are conducted. In addition, the amounts of estrogenic hormones that can be mixed up in the underground water from sludge are investigated.
In the assessment of drinking water springs and inflow/outlet of treatment plants, it has been found that the values of 17β-estradiol and estrone are 37 – 382 ng/L and <1 and 187 ng/L respectively; sludge values are 38 – 156 ng/L and 2 – 54 ng/L respectively.
In the adsorption and ozonation studies for the removal of estrogenic hormones, removal efficiencies, adsorption isotherms, kinetic values and thermodynamic studies have been conducted for 17β- estradiol and estrone. In adsorption studies, isotherm calculations are made with 90% and over removal efficiency and it is seen that the adsorption is in conformity with Freundlich isotherm. Following the kinetic calculations, it is also seen that the adsorption is in conformity with the second-order rate equations. Following the analysis of the adsorption thermodynamically, ∆G Gibbs Free energy is found to be positive; enthalpy and entropy variations are found to be positive. The removal efficiency has reached 90% and over with ozonation.

In the study conducted to detect the amount of the hormone that can be mixed up in underground water, it is detected that in the rains of April, May and September, a total of 69,02 µg/m²; 36,2 µg/m² and 111,7 µg/m² 17β-estradiol and 27,13 µg/m²; 10,1 µg/m² and 45,8 µg/m² estrone; respectively, dissolved from the sludge and penetrated into underground.