Optimizing water ozonation conditions with the aim of removing estrone and 17β-estradiol hormones

Abstract

The presence of endocrine-disrupting chemicals in the environment and their adverse effects on human and animal health have attracted much attention in recent years. Estrogens are the most important endocrine disruptors and estrone (E1) and 17β-estradiol (E2) is the strongest of them. This study aimed to optimize the conditions of the removal of E1 and E2hormones in water using ozonation. To evaluate the amount of E1and E2, high-performance liquid chromatography was used. To evaluate the effect of ozonation on the removal of the studied hormones, first, the optimal ozonation conditions in terms of ozone gas concentration, ozonation time, pH, and E1 and E2hormones were calculated. According to the obtained results, ozone concentration of 4 mg / l, duration of 5 minutes, pH of 6, and initial concentration of the solution of E1 and E2hormones up to 10 mg / l had the greatest effect. Eventually, ozonation under optimal conditions eliminated 90% of E1 and 95% of E2. Overall, the results of this study showed that ozonation under optimal conditions is a good way to remove these hormones from water.

Keywords

• estrone
• 17β-estradiol
• water
• ozonation