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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F20%3A00536196" target="_blank" >RIV/61388955:_____/20:00536196 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0314003" target="_blank" >http://hdl.handle.net/11104/0314003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00706-020-02683-6" target="_blank" >10.1007/s00706-020-02683-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monatshefte fur Chemie

ISSN

0026-9247

e-ISSN

—

Svazek periodika

151

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

13

Strana od-do

1511-1523

Kód UT WoS článku

000576777800002

EID výsledku v databázi Scopus

2-s2.0-85092225799