Adsorption of Formaldehyde from Aqueous Solutions Using Metakaolin-Based Geopolymer Sorbents

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918946" target="_blank" >RIV/60461373:22310/19:43918946 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1134%2FS2070205119050198" target="_blank" >https://link.springer.com/article/10.1134%2FS2070205119050198</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S2070205119050198" target="_blank" >10.1134/S2070205119050198</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Adsorption of Formaldehyde from Aqueous Solutions Using Metakaolin-Based Geopolymer Sorbents

Popis výsledku v původním jazyce

Abstract: Geopolymer samples prepared through alkali activation of metakaolin under varying conditions of synthesis (100°C (14 h); 130°C (3 h); clinoptilolite filler) are employed as formaldehyde sorbents from aqueous solutions. The structure and physicochemical properties of geopolymer sorbents are studied using XRD, XRF, SEM, N2 adsorption–desorption, and chemical methods. Zeolite A is the main component among the structural components in the synthesized specimens (zeolite А, hydroxysodalite, and quartz). Addition of the clinoptilolite filler in the synthesis of geopolymers has resulted in a slight increase in their specific surface and pore volume. Geopolymer sorbent specimens display strong adsorption ability in relation to sorbate molecules in aqueous solutions of formaldehyde (0.064–0.366 M). The cation-exchange capacity of the geopolymers, which is 2–3 times as large as that of the natural clinoptilolite specimen, is the probable reason of their strong adsorption capacity to formaldehyde. The nature of the exchanged cation (Na+, NH4 +-,$$ Cu2+) determines the magnitude and the predominant mechanism of sorption uptake of formaldehyde (physical adsorption, chemisorption, and complexation). Higher adsorption values of formaldehyde are obtained in the case of NH4 +- and Cu2+-forms of geopolymer sorbents compared to the Na+-form. © 2019, Pleiades Publishing, Ltd.

Název v anglickém jazyce

Adsorption of Formaldehyde from Aqueous Solutions Using Metakaolin-Based Geopolymer Sorbents

Popis výsledku anglicky

Abstract: Geopolymer samples prepared through alkali activation of metakaolin under varying conditions of synthesis (100°C (14 h); 130°C (3 h); clinoptilolite filler) are employed as formaldehyde sorbents from aqueous solutions. The structure and physicochemical properties of geopolymer sorbents are studied using XRD, XRF, SEM, N2 adsorption–desorption, and chemical methods. Zeolite A is the main component among the structural components in the synthesized specimens (zeolite А, hydroxysodalite, and quartz). Addition of the clinoptilolite filler in the synthesis of geopolymers has resulted in a slight increase in their specific surface and pore volume. Geopolymer sorbent specimens display strong adsorption ability in relation to sorbate molecules in aqueous solutions of formaldehyde (0.064–0.366 M). The cation-exchange capacity of the geopolymers, which is 2–3 times as large as that of the natural clinoptilolite specimen, is the probable reason of their strong adsorption capacity to formaldehyde. The nature of the exchanged cation (Na+, NH4 +-,$$ Cu2+) determines the magnitude and the predominant mechanism of sorption uptake of formaldehyde (physical adsorption, chemisorption, and complexation). Higher adsorption values of formaldehyde are obtained in the case of NH4 +- and Cu2+-forms of geopolymer sorbents compared to the Na+-form. © 2019, Pleiades Publishing, Ltd.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

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

2019

Kód důvěrnosti údajů

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

Název periodika

Protection of Metals and Physical Chemistry of Surfaces

ISSN

2070-2051

e-ISSN

—

Svazek periodika

55

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

864-871

Kód UT WoS článku

000490601200009

EID výsledku v databázi Scopus

2-s2.0-85073621257