The effects of selenate on goethite synthesis and selenate sorption kinetics onto a goethite surface - A three-step process with an unexpected desorption phase

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00342532" target="_blank" >RIV/68407700:21340/20:00342532 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.chemgeo.2020.119852" target="_blank" >https://doi.org/10.1016/j.chemgeo.2020.119852</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemgeo.2020.119852" target="_blank" >10.1016/j.chemgeo.2020.119852</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effects of selenate on goethite synthesis and selenate sorption kinetics onto a goethite surface - A three-step process with an unexpected desorption phase

Popis výsledku v původním jazyce

Iron oxyhydroxides are widely spread in soils and sediments. They can considerably affect the migration of selenate in the environment, due to their high affinity towards oxyanions. To assess the sorptive properties of one of the most common oxyhydroxides, the selenate sorption onto goethite and its effects on goethite's structural properties during its crystallization were investigated. The sorption kinetics of selenate onto goethite at different pH revealed the presence of a desorption phase that had manifested extensively, especially at higher pH values. Also, an isotherm study indicated that the selenate sorption onto goethite is multi-layered at higher concentrations. Phosphate, which is one of the common naturally occurring oxyanions, affected selenate sorption onto goethite significantly, while chloride and sulfate influenced sorption only marginally. The Mössbauer spectrometry showed no structural changes after iron oxyhydroxides crystallization in the presence of selenate. However, changes outside the goethite lattice were manifested by the alterations in distributions of hyperfine magnetic fields obtained from Mössbauer spectra analyses, as well as by the changes in values of the selenatetreated samples' surface charge.

Název v anglickém jazyce

The effects of selenate on goethite synthesis and selenate sorption kinetics onto a goethite surface - A three-step process with an unexpected desorption phase

Popis výsledku anglicky

Iron oxyhydroxides are widely spread in soils and sediments. They can considerably affect the migration of selenate in the environment, due to their high affinity towards oxyanions. To assess the sorptive properties of one of the most common oxyhydroxides, the selenate sorption onto goethite and its effects on goethite's structural properties during its crystallization were investigated. The sorption kinetics of selenate onto goethite at different pH revealed the presence of a desorption phase that had manifested extensively, especially at higher pH values. Also, an isotherm study indicated that the selenate sorption onto goethite is multi-layered at higher concentrations. Phosphate, which is one of the common naturally occurring oxyanions, affected selenate sorption onto goethite significantly, while chloride and sulfate influenced sorption only marginally. The Mössbauer spectrometry showed no structural changes after iron oxyhydroxides crystallization in the presence of selenate. However, changes outside the goethite lattice were manifested by the alterations in distributions of hyperfine magnetic fields obtained from Mössbauer spectra analyses, as well as by the changes in values of the selenatetreated samples' surface charge.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/EF16_019%2F0000778" target="_blank" >EF16_019/0000778: Centrum pokročilých aplikovaných přírodních věd</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Chemical Geology

ISSN

0009-2541

e-ISSN

1872-6836

Svazek periodika

556

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000589920700002

EID výsledku v databázi Scopus

2-s2.0-85090111020