Competitive Degradation of Steroid Estrogens by Potassium Permanganate Combined with Ultrasound

International Journal of Environmental Research and Public Health

Jing Deng⁴  Kai Tang⁴  Shijun Zhu⁴  Xiaoyan Ma⁴  Kejia Zhang³  Yali Song⁵  Xueyan Li¹  Qingsong Li²  Zhenhua Liu⁸  Kejin Zhou⁶  Rao Bhamidiammarri⁷ 

[1] School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen 361005, China;Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China;College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China;School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China;Zhejiang Province Environmental Monitoring Center, Hangzhou 310012, China;;College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, ChinaDepartment of Municipal Engineering, Zhejiang University of Water Resource and Electric Power, Hangzhou 361018, China;

关键词: coexisting pollutant;    competitive degradation;    drinking water treatment;    KMnO₄/ultrasound;    steroid estrogens;   

DOI  :  10.3390/ijerph121214995

来源: mdpi

【 摘 要 】

The occurrence of natural estrogens including estrone (E1), 17β-estradiol (E2), and synthetic 17α-ethinylestradiol (EE2), which can be excreted by both humans and animals, and can enter the aqueous environment along with the discharge of domestic sewage, is a major concern since this may represent a serious health risk to humans even at extremely trace levels (ng·L⁻¹). Simultaneous degradation of three coexisting steroid estrogens (SEs) in aqueous solutions by coupled ultrasound and KMnO₄ systems (KMnO₄/ultrasound) were investigated to find out whether there is a competitive degradation of multiple contaminants or not. Results indicate that the degradation ratios of target SEs were all more than 50% after 120 min reaction contact, greatly enhanced when compared with the single KMnO₄ (2 mg·L⁻¹) oxidation of E2 (37.0%), EE2 (34.4%), and E1 (34.0%), and the single sonochemical oxidation of E2 (37.1%), EE2 (31.1%), and E1 (29.7%). In the adopted processes, the degradations of SEs fit the first-order kinetic reaction, with different reaction rates. Kinetic parameters revealed there was little difference between coexisting SEs, which means there was almost no competitive degradation. The removal efficiency and degradation rate of SEs in natural water was higher than those in pure water, which suggested that the coupled KMnO₄/ultrasound technology had prospective applications in the removal of complex contaminants in actual drinking water treatment.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.