Competitive Degradation of Steroid Estrogens by Potassium Permanganate Combined with Ultrasound

Jing Deng, Kai Tang, Shijun Zhu, Xiaoyan Ma, Kejia Zhang, Yali Song, Xueyan Li, Qingsong Li, Zhenhua Liu and Kejin Zhou
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Jing Deng: College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China
Kai Tang: College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China
Shijun Zhu: College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China
Xiaoyan Ma: College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China
Kejia Zhang: Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China
Yali Song: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Xueyan Li: School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
Qingsong Li: Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen 361005, China
Zhenhua Liu: Department of Municipal Engineering, Zhejiang University of Water Resource and Electric Power, Hangzhou 361018, China
Kejin Zhou: Zhejiang Province Environmental Monitoring Center, Hangzhou 310012, China

IJERPH, 2015, vol. 12, issue 12, 1-15

Abstract: The occurrence of natural estrogens including estrone (E1), 17?-estradiol (E2), and synthetic 17?-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 KMnO 4 systems (KMnO 4 /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 KMnO 4 (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 KMnO 4 /ultrasound technology had prospective applications in the removal of complex contaminants in actual drinking water treatment.

Keywords: coexisting pollutant; competitive degradation; drinking water treatment; KMnO 4 /ultrasound; steroid estrogens (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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