Removal of arsenate and antimonate by acid-treated Fe-rich clays

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43916889" target="_blank" >RIV/60461373:22310/18:43916889 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/18:73587909

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jhazmat.2018.06.028" target="_blank" >http://dx.doi.org/10.1016/j.jhazmat.2018.06.028</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jhazmat.2018.06.028" target="_blank" >10.1016/j.jhazmat.2018.06.028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Removal of arsenate and antimonate by acid-treated Fe-rich clays

Popis výsledku v původním jazyce

Iron impurities in clays degrade the quality in many aspects, but available Fe oxides can significantly improve adsorption affinity of clays to anionic particles. Two natural Fe-rich clays (kaolin and bentonite) were treated in 0.5 M HCl (pH = 1.1) and 0.15 M (COOH)(2) (pH = 1.2), and then used to adsorb As-V/Sb-V oxyanions from model solutions. After acid leaching, the equilibrium sorption capacities (q(max)) increased from 2.3 x 10(-3) to 39.2 x 10(-3) mmol g(-1) for As-V and from 2.4 x 10(-3) to 40.1 x 10(-3) mmol g(-1) for Sb-V, more than doubling the adsorption yields approximate to 95%) of both oxyanions. Leaching in 0.5 M HCl enhanced both As-V and Sb-V adsorption, whereas leaching in 0.15 M (COOH)(2) mainly improved the adsorption of Sb-V. Bentonite, which contained fewer crystalline forms of Fe, exhibited better sorption properties for both oxyanions. The leaching of Fe followed first-order kinetics, whereas the adsorption of As-V/Sb-V followed second-order kinetics. Acid leaching of Fe-rich clays can be used for the preparation of highly selective anionactive sorbents.

Název v anglickém jazyce

Removal of arsenate and antimonate by acid-treated Fe-rich clays

Popis výsledku anglicky

Iron impurities in clays degrade the quality in many aspects, but available Fe oxides can significantly improve adsorption affinity of clays to anionic particles. Two natural Fe-rich clays (kaolin and bentonite) were treated in 0.5 M HCl (pH = 1.1) and 0.15 M (COOH)(2) (pH = 1.2), and then used to adsorb As-V/Sb-V oxyanions from model solutions. After acid leaching, the equilibrium sorption capacities (q(max)) increased from 2.3 x 10(-3) to 39.2 x 10(-3) mmol g(-1) for As-V and from 2.4 x 10(-3) to 40.1 x 10(-3) mmol g(-1) for Sb-V, more than doubling the adsorption yields approximate to 95%) of both oxyanions. Leaching in 0.5 M HCl enhanced both As-V and Sb-V adsorption, whereas leaching in 0.15 M (COOH)(2) mainly improved the adsorption of Sb-V. Bentonite, which contained fewer crystalline forms of Fe, exhibited better sorption properties for both oxyanions. The leaching of Fe followed first-order kinetics, whereas the adsorption of As-V/Sb-V followed second-order kinetics. Acid leaching of Fe-rich clays can be used for the preparation of highly selective anionactive sorbents.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

<a href="/cs/project/GA16-13778S" target="_blank" >GA16-13778S: Selektivní sorbenty toxických iontů připravené z odpadní keramiky: charakterizace, metody a aplikace</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Hazardous Materials

ISSN

0304-3894

e-ISSN

—

Svazek periodika

357

Číslo periodika v rámci svazku

june 2018

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

440-448

Kód UT WoS článku

000440958900048

EID výsledku v databázi Scopus

—