Sorption and degradation of 17β-estradiol-17-sulfate in sterilized soil-water systems

Xuelian Bai; Francis X M Casey; Heldur Hakk; Thomas M DeSutter; Peter G Oduor; Eakalak Khan

doi:10.1016/j.chemosphere.2014.02.016

Sorption and degradation of 17β-estradiol-17-sulfate in sterilized soil-water systems

Chemosphere. 2015 Jan:119:1322-1328. doi: 10.1016/j.chemosphere.2014.02.016. Epub 2014 Mar 12.

Authors

Xuelian Bai¹, Francis X M Casey², Heldur Hakk³, Thomas M DeSutter¹, Peter G Oduor⁴, Eakalak Khan⁵

Affiliations

¹ Department of Soil Science, North Dakota State University, Fargo, ND 58108-6050, USA.
² Department of Soil Science, North Dakota State University, Fargo, ND 58108-6050, USA. Electronic address: Francis.Casey@ndsu.edu.
³ Biosciences Research Laboratory, USDA-ARS, Fargo, ND 58102-2765, USA.
⁴ Department of Geosciences, North Dakota State University, Fargo, ND 58108-6050, USA.
⁵ Department of Civil Engineering, North Dakota State University, Fargo, ND 58108-6050, USA.

PMID: 24630461
DOI: 10.1016/j.chemosphere.2014.02.016

Abstract

To identify abiotic processes that govern the fate of a sulfate conjugated estrogen, 17β-estradiol-17-sulfate (E2-17S), soil batch experiments were conducted to investigate the dissipation, sorption, and degradation of radiolabeled E2-17S under sterilized conditions. The aqueous dissipation half-lives (DT50) for E2-17S ranged from 2.5 to 9.3h for the topsoil of high organic carbon (OC) content (1.29%), but E2-17S remained at ∼80% of applied dose in the low OC (0.26%) subsoil by 14 d. The non-linear sorption isotherms indicated limited sorption of E2-17S, and the concentration-dependent log KOC values were 2.20 and 2.45 for the topsoil and subsoil, respectively. Additionally, two types of hydroxyl E2-17S (OH-E2-17S and diOH-E2-17S) were found as major metabolites in the aqueous phase, which represented 9-25% and 6-7% of applied dose for the topsoil and subsoil at 14 d, respectively. Free estrogens, 17β-estradiol (E2) and estrone (E1), were detected from the sorbed phase of the soil-water systems.

Keywords: 17β-Estradiol-17-sulfate; Deconjugation; Estrogen conjugate; Hydroxylation; Sorption.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Adsorption
Estradiol / analogs & derivatives*
Estradiol / analysis
Estradiol / chemistry
Estrogens / analysis
Estrogens / chemistry
Estrone / analysis
Estrone / chemistry
Soil / chemistry
Soil Pollutants / analysis
Soil Pollutants / chemistry*
Sterilization
Water / chemistry
Water Pollutants, Chemical / analysis
Water Pollutants, Chemical / chemistry*

Substances

Estrogens
Soil
Soil Pollutants
Water Pollutants, Chemical
Water
Estrone
estradiol 17-sulfate
Estradiol