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Photodegradation of 17β-estradiol in aquatic solution under solar irradiation: Kinetics and influencing water parameters

Paper ID Volume ID Publish Year Pages File Format Full-Text
28801 44093 2011 9 PDF Available
Title
Photodegradation of 17β-estradiol in aquatic solution under solar irradiation: Kinetics and influencing water parameters
Abstract

Photodegradation of the natural steroid 17β-estradiol (E2), an endocrine disrupting hormone which is commonly released into aquatic environments, was investigated under simulated sunlight (290–700 nm) using a solar simulator in the presence of several natural water constituents including NO3−, Fe3+, HCO3−, humic acid and turbidity. The E2 degradation followed pseudo-first-order kinetics, with the rate constant decreasing slightly with increasing initial constituent concentration while increasing with the square root of solar intensity in the region of 25–100 mW cm−2. The rate of mineralization based on the total organic carbon (TOC) reduction was always lower than E2 degradation, although the TOC of the solution decreased steadily with irradiation time. In the presence of NO3−, Fe3+, and humic acid, the photodegradation rate increased significantly, attributed to photosensitization by the reactive species, while HCO3− slowed down the degradation rate because of OH scavenging. Turbidity also reduced the photodegradation of E2 by decreasing light transmittance due to attenuation. The solution pH also had a considerable effect on the rate with maximum degradation occurring around a neutral pH of 7.

Keywords
17β-Estradiol; EDCs; Photodegradation; Hydroxyl radicals; Solar simulator
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Photodegradation of 17β-estradiol in aquatic solution under solar irradiation: Kinetics and influencing water parameters
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 219, Issue 1, 5 March 2011, Pages 67–75
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us