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High-valent iron (Fe(VI), Fe(V), and Fe(IV)) species in water: characterization and oxidative transformation of estrogenic hormones
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SYSNO ASEP 0464111 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High-valent iron (Fe(VI), Fe(V), and Fe(IV)) species in water: characterization and oxidative transformation of estrogenic hormones Author(s) Machalová-Šišková, K. (CZ)
Jančula, Daniel (BU-J) RID
Drahoš, B. (CZ)
Machala, L. (CZ)
Babica, Pavel (BU-J) RID, ORCID
Godoy Alonso, Paula (BU-J)
Trávníček, Z. (CZ)
Tuček, J. (CZ)
Maršálek, Blahoslav (BU-J) ORCID, SAI
Sharma, V. K. (US)
Zbořil, R. (CZ)Number of authors 11 Source Title Physical Chemistry Chemical Physics. - : Royal Society of Chemistry - ISSN 1463-9076
Roč. 18, č. 28 (2016), s. 18802-18810Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords high-valent iron species ; estrogenic hormones ; oxidative transformation Subject RIV DJ - Water Pollution ; Quality R&D Projects FR-TI3/196 GA MPO - Ministry of Industry and Trade (MPO) Institutional support BU-J - RVO:67985939 UT WOS 000379939100019 EID SCOPUS 84978758629 DOI 10.1039/c6cp02216b Annotation This paper presents solid state synthesis and characterization of tetra-oxy iron(IV) and iron(V) species in their salt forms (Na4FeO4-Fe-IV and K3FeO4-Fe-V). Stability of the synthesized salts, commonly called ferrates, in water was determined by applying the Fe-57 Mossbauer spectroscopy technique. Within 2 s in water, Fe-IV converted into Fe-III while Fe-V transformed into Fe-VI and Fe-III at pH = 8.2. Comparatively, Fe-VI (bought as K2FeO4) remained stable in aqueous solution during the short time period. The oxidative removal efficiency of the high-valent iron species was then tested against five environmentally important estrogenic hormones (estron (E1), 17-beta-estradiol (E2), estriol (E3), 17-alpha-ethinylestradiol (EE2), and diethylstibestrol (DES)) in effluent water of a wastewater treatment plant. Three dosages of iron species (1, 10, and 100 mg L-1) were applied to the effluent water. An increase in the concentration of dosages enhanced the removal of estrogens. Both Fe-V and Fe-VI were effective in degrading estrogens, but Fe-IV showed limited oxidation capacity to transform estrogens. The oxidized products of the estrogens were analyzed using Raman spectroscopy and high-performance liquid chromatography-mass spectrometry (HPLC-MS) techniques. Results demonstrated the transformation of estrogens into low molecular weight oxygenated compounds such as quinone-like and opened-aromatic ring species. A detailed study on E1 by using excess Fe-VI showed the mineralization of the parent compound. The results demonstrate great potential of high-valent iron species in the degradation of endocrine disruptor chemicals like estrogens with several superior aspects including fast reactions, complete degradation and/or formation of benign organic species, and environmentally-acceptable iron oxide by-products. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2017
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