Removal of antimonate (Sb(V)) from aqueous solutions and its immobilization in soils with a novel Fe(III)-modified montmorillonite sorbent (CROSBI ID 304014)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bagherifam, Saeed ; Komarneni, Sridhar ; van Hullebusch, Eric D ; Stjepanović, Marija
engleski
Removal of antimonate (Sb(V)) from aqueous solutions and its immobilization in soils with a novel Fe(III)-modified montmorillonite sorbent
Over the past decades, contamination of terrestrial environments with antimony (Sb) has aroused a great deal of public concern. In this research, the efficacy of Fe(III)-modified montmorillonite (Mt) (Fe-Mt) for the removal of Sb(V) from aqueous solutions with Sb(V) concentration in the range of 0.2–1 mmol L−1 and immobilization of Sb(V) in soils spiked with 250 mg Sb(V) kg−1 was investigated. The immobilizing mechanisms of the modified clay were assessed by fitting the experimental sorption data with the Langmuir and Freundlich sorption models and a series of single and sequential extraction studies. The results showed that the adsorption data had a better fit with the Langmuir equation (R2: 0.99) and Fe-Mt could efficiently remove up to 95% of Sb(V) at lower concentration ranges. The concentrations of Sb(V) in exchangeable fraction of modified Community Bureau of Reference (BCR) sequential extraction and distilled water extracts of the amended soils decreased dramatically by up to 60% and 92%, respectively. Furthermore, the bioaccessibility of Sb(V) in simulated human gastric juice reduced remarkably by 52% to 60%, depending upon the soil fraction sizes. The results confirmed that Fe-Mt could be a promising candidate for the removal of Sb(V) from aqueous solutions and immobilization of Sb(V) in terrestrial environments.
antimony ; bioaccessibility ; bioavailability ; adsorption isotherms ; immobilization ; in situ stabilization
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nije evidentirano
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nije evidentirano
nije evidentirano
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Podaci o izdanju
29
2022.
2073-2083
objavljeno
0944-1344
1614-7499
10.1007/s11356-021-15765-7
Povezanost rada
Kemijsko inženjerstvo, Prehrambena tehnologija