Rare Earth Element Adsorption from Water Using Alkali-Activated Waste Fly Ash DOI Open Access

Tijana Radojičić,

Katarina Trivunac, Marija Vukčević

и другие.

Materials, Год журнала: 2025, Номер 18(3), С. 699 - 699

Опубликована: Фев. 5, 2025

As new technologies are developed, the demand for rare earth elements (REEs) has increased, despite limited awareness of their significant impact on people and environment. In this study, waste fly ash was used as a precursor to synthesize inorganic aluminosilicate polymers by adding an activator alumina silica compounds ash. Due structure adsorption potential, application removal selected REEs (Gd3+, Y3+, Sc3+) from water been investigated. A decrease in intensity quartz peak at 2θ 26.6° XRD spectrum disappearance albite mullite peaks due dissolution during alkaline activation both modified samples were observed. The appearance 29.3° 39.3° corresponding calcite sample indicates presence wood shifting band DRIFT 1030 cm−1 spectra corresponds vibrations Al-O Si-O bonds formation polymeric network (Si-O-Si or Si-O-Al). According pHPZC values, thermodynamic kinetic parameters, chemical composition, presumed mechanism REE is chemisorption ion exchange. highest efficiencies (up 95%) all examined single mixed solutions obtained alkali-activated mixture results research expanding knowledge about environment, reduction modification, potential subsequent use construction additives.

Язык: Английский

Rare Earth Element Adsorption from Water Using Alkali-Activated Waste Fly Ash DOI Open Access

Tijana Radojičić,

Katarina Trivunac, Marija Vukčević

и другие.

Materials, Год журнала: 2025, Номер 18(3), С. 699 - 699

Опубликована: Фев. 5, 2025

As new technologies are developed, the demand for rare earth elements (REEs) has increased, despite limited awareness of their significant impact on people and environment. In this study, waste fly ash was used as a precursor to synthesize inorganic aluminosilicate polymers by adding an activator alumina silica compounds ash. Due structure adsorption potential, application removal selected REEs (Gd3+, Y3+, Sc3+) from water been investigated. A decrease in intensity quartz peak at 2θ 26.6° XRD spectrum disappearance albite mullite peaks due dissolution during alkaline activation both modified samples were observed. The appearance 29.3° 39.3° corresponding calcite sample indicates presence wood shifting band DRIFT 1030 cm−1 spectra corresponds vibrations Al-O Si-O bonds formation polymeric network (Si-O-Si or Si-O-Al). According pHPZC values, thermodynamic kinetic parameters, chemical composition, presumed mechanism REE is chemisorption ion exchange. highest efficiencies (up 95%) all examined single mixed solutions obtained alkali-activated mixture results research expanding knowledge about environment, reduction modification, potential subsequent use construction additives.

Язык: Английский

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