Journal
ENVIRONMENTAL POLLUTION
Volume 206, Issue -, Pages 80-87Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.06.024
Keywords
Arylsulfotransferase; Estrogens; Estrogen conjugates; Estrogen fate and transport; Metabolite formation
Categories
Funding
- European Commission [PITN-GA-2008-212298]
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Endocrine disrupting chemicals, such as the free estrogens 17 beta-estradiol (E2), estrone (E1) and the conjugated estrogen estrone-sulfate (E1-3S) are found at low concentration levels in the environment. This is somehow contradictory to the strong sorption and high degradation potentials found in laboratory experiments. In particular, the fate and transport behavior of conjugated estrogens is poorly understood, and the importance of enzymes triggering the transformation pathways has received little attention. To address these deficiencies, the present research uses packed laboratory soil columns with pulse injections of free estrogens, either E2 or El, or E1-3S, to provide sound evidence of the transformation pathways. It is further shown that (i) transport of free estrogens is subject to strong retardation and degradation, (ii) the transport of conjugated estrogens is less retarded and only to a minor degree affected by degradation, and (iii) arylsulfotransferase is the enzyme triggering the transformation reaction. (C) 2015 Elsevier Ltd. All rights reserved.
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