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Can zero-valent iron nanoparticles remove waterborne estrogens?

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JAROŠOVÁ Barbora FILIP Jan HILSCHEROVÁ Klára TUČEK Jiří ŠIMEK Zdeněk GIESY John P. ZBOŘIL Radek BLÁHA Luděk

Rok publikování 2015
Druh Článek v odborném periodiku
Časopis / Zdroj JOURNAL OF ENVIRONMENTAL MANAGEMENT
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://www.sciencedirect.com/science/article/pii/S0301479714005842
Doi http://dx.doi.org/10.1016/j.jenvman.2014.12.007
Obor Biofyzika
Klíčová slova Estrogens; Zero-valent iron nanoparticles; Sorption; Chemical composition; Total estrogenic activity
Popis Steroidal estrogens are one of the most challenging classes of hazardous contaminants as they can cause adverse effects to biota in extremely low concentrations. They emerge in both waste waters and surface waters serving as a source of drinking water. Environmental Quality Standards for 17 beta-estradiol (E2) and 17 alpha-ethinylestradiol (EE2), promulgated within the EU Water Framework Directive, are 0.4 and 0.035 ng L-1, respectively. Because nanoscale zero-valent iron (nZVI) particles have been previously used in numerous remediation technologies and have the advantage of possible magnetic separation, interaction of nZVI with E2 and EE2 in water was investigated to assess the potential role of nZVI in removing steroidal estrogens. A mixture of E2 and EE2 dissolved in water was shaken with varying doses of nZVI for 1-5 h. Concentration-dependent removal of the estrogens was observed but removal did not increase significantly with time. Concentrations of the estrogens were determined by HPLC/MS/MS and a biodetection reporter gene assay. Sorption and nonspecific oxygen-mediated oxidation of estrogens were identified as the most probable removal mechanisms. Two independent experiments confirmed that significant decrease of estrogens concentration is achieved when at least 2 g L-1 of nZVI is applied. The presented study provides insights into the mechanisms of nZVI interaction with steroidal estrogens under aerobic conditions prevailing in currently applied water treatment technologies.
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