Počet záznamů: 1

Electrochemical monitoring of metal ions removal in Fe-0/H2O systems: competitive effects of cations Zn2+, Pb2+, and Cd2+

SYSNO ASEP	0536196
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Electrochemical monitoring of metal ions removal in Fe-0/H2O systems: competitive effects of cations Zn2+, Pb2+, and Cd2+
Tvůrce(i)	Touomo-Wouafo, M. (CM) Donkeng Dazie, Joel (UFCH-W)_{RID, ORCID} Jirka, Ivan (UFCH-W)_{RID, ORCID} Btatkeu-K, B.D. (CM) Tchatchueng, J. B. (CM) Noubactep, Ch. (DE) Ludvík, Jiří (UFCH-W)_{RID, ORCID}
Zdroj.dok.	Monatshefte fur Chemie. - : Springer - ISSN 0026-9247 Roč. 151, č. 10 (2020), s. 1511-1523
Poč.str.	13 s.
Jazyk dok.	eng - angličtina
Země vyd.	AT - Rakousko
Klíč. slova	zero-valent iron ; aqueous-solution ; environmental remediation ; adsorption ; cu ; corrosion ; water ; contamination ; spectroscopy ; efficiency ; Heavy metals ; Multiple cations ; Electrochemistry ; Water treatment ; Aged zero-valent iron
Vědní obor RIV	CG - Elektrochemie
Obor OECD	Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Způsob publikování	Omezený přístup
Institucionální podpora	UFCH-W - RVO:61388955
UT WOS	000576777800002
EID SCOPUS	85092225799
DOI	10.1007/s00706-020-02683-6
Anotace	Metallic iron (Fe-0) is a reactive material that is widely used for industrial water treatment. The course of the metal ion removal process using Fe-0(iron powder) was monitored electrochemically (differential pulse polarography). As probe species, Zn2+, Pb2+, and Cd(2+)were selected for their different (1) adsorptive affinity to iron corrosion products (FeCPs), (2) redox properties, (3) precipitation ability at various pH. Batch experiments were carried out with binary (Zn2+/ Pb(2+)and Zn2+/ Cd2+) and ternary (Zn2+/Cd2+/Pb2+) systems to reveal the mutual interference of these cations. Detailed time monitoring of iron aging for up to 14 days as well as concentration decay of individual removed cations represent important data for mechanistic discussions. The aqueous concentration of Fe(2+)was also monitored. FeCPs were characterized using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Results showed that the presence of Pb(2+)delays the Zn(2+)removal whereas the presence of Cd(2+)in solution accelerates its removal. The removal of Pb(2+)by FeCPs was not affected by the presence of Zn(2+)and Cd2+, moreover, the Pb(2+)inhibited the effect of Cd(2+)on the removal of Zn2+. XPS has proven existence of Fe(2)O(3)and hydrated Fe oxidic phase, whilst the SEM showed that the original Fe grains were partly dissolved into buffered ambient under formation of fine particles of FeCPs. Results confirm that reductive transformation of any contaminant in a Fe-0/H2O system is the consequence and not the cause of iron corrosion.
Pracoviště	Ústav fyzikální chemie J.Heyrovského
Kontakt	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Rok sběru	2021
Elektronická adresa	http://hdl.handle.net/11104/0314003

Počet záznamů: 1