Photodegradation of estrone enhanced by dissolved organic matter under simulated sunlight

In the present work the degradation of estrone (E1) a natural estrogenic hormone has been studied under simulated solar irradiation. The photodegradation of E1 has been investigated in the absence and in the presence of 7.7–8.9 mg L −1 of dissolved organic carbon (DOC), under solar light simulation...

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Bibliographic Details
Published in:Water research (Oxford) 2011-05, Vol.45 (11), p.3341-3350
Main Authors: Caupos, Emilie, Mazellier, Patrick, Croue, Jean-Philippe
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Approximation
Carbon
Carbon - chemistry
Chemical Sciences
chromatography
Degradation
dissolved organic carbon
Dissolved organic carbon - DOC
Dissolved organic matter
Endocrine Disruptors - analysis
Endocrine Disruptors - chemistry
Estrone
Estrone - analysis
Estrone - chemistry
Estrone - radiation effects
Exact sciences and technology
Fresh Water - chemistry
half life
Humic Substances
ions
Irradiation
isopropyl alcohol
light intensity
Optical properties
Photochemical Processes
Photodegradation
Photolysis
Photoproducts
Pollution
Simulation
solar radiation
Sunlight
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - chemistry
Water Pollutants, Chemical - radiation effects
Water treatment and pollution
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Summary:In the present work the degradation of estrone (E1) a natural estrogenic hormone has been studied under simulated solar irradiation. The photodegradation of E1 has been investigated in the absence and in the presence of 7.7–8.9 mg L −1 of dissolved organic carbon (DOC), under solar light simulation with irradiance approximating that of the sun. DOC extracts from different origins have been used. Half-lives ranging between 3.9 h and 7.9 h were observed. Results indicated that E1 was photodegraded even in the absence of DOC. The presence of DOC was found to enhance the degradation of E1. Experiments performed with the addition of reactive species scavengers (azide ions and 2-propanol) have shown that these two species play a significant role in the photodegradation. Some experiments have been performed with a DOC previously submitted to solar irradiation. Changes in optical and physico-chemical properties of DOC strongly affect its photoinductive properties, and hence its efficiency on E1 degradation. A part of the study consisted in the investigation of photoproducts structures. Five photoproducts were shown by chromatographic analysis: one arising from direct photolysis and the four others from DOC photoinduced degradation. ► The degradation of estrone has been studied under simulated solar irradiation. ► The presence of organic carbon (DOC) enhanced the rate of estrone degradation. ► The effect of DOC extracts addition depends on DOC characteristics. ► Five photoproducts were evidenced. ► One arose from direct photolysis, the four others from DOC photo induced degradation.
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2011.03.047