Efficient sorption of As(III) from water by magnetite decorated porous carbon extracted from a biowaste material.

Autor: Bibi F; Department of Chemistry, COMSATS University Islamabad, Islamabad, Pakistan.; Department of Chemistry, University of Poonch Rawalakot, Rawalakot, Azad Jammu and Kashmir, Pakistan.; School of Science, RMIT University Melbourne, Melbourne, Victoria, 3000, Australia., Hussain R; Department of Chemistry, COMSATS University Islamabad, Islamabad, Pakistan., Shaikh AJ; Department of Chemistry, COMSATS University Islamabad - Abbottabad Campus, Abbottabad, 22060, Khyber Pakhtunkhwa, Pakistan., Waseem M; Department of Chemistry, COMSATS University Islamabad, Islamabad, Pakistan. waseem_atd@yahoo.com., Iqbal N; US-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan., Loomba S; School of Engineering, RMIT University Melbourne, Melbourne, Victoria, 3000, Australia., Haris M; School of Engineering, RMIT University Melbourne, Melbourne, Victoria, 3000, Australia., Mahmood N; School of Science, RMIT University Melbourne, Melbourne, Victoria, 3000, Australia.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 Mar; Vol. 31 (15), pp. 22790-22801. Date of Electronic Publication: 2024 Feb 27.
DOI: 10.1007/s11356-024-32624-3
Abstrakt: Arsenic is a highly toxic metal that causes cancer even at a low concentration and its removal from water resources is challenging. Herein, carbon extracted from waste onion bulbs is activated to cater for porosity and functionalized with magnetite (Fe 3 O 4 ) nanoparticles (named MCK6) to address the challenge of As(III) removal. Synthesized MCK6 was highly mesoporous having a surface area of 208 m 2 /g, where magnetite nanoparticles (≤ 10 nm) are homogeneously distributed within a porous network. The developed adsorbent inherited functional groups from the biosource and magnetic property from magnetite making it ideal for removal of As(III). Further, MCK6 showed a maximum monolayer adsorption capacity (q m ) of 10.2 mg/g at 298 K and pH 7. The adsorption thermodynamics delineates a non-spontaneous and endothermic reaction, where the kinetics followed pseudo 2nd order (R 2 value of 0.977), while monolayer formation is explained by the Langmuir model. Moreover, MCK6 efficiently works to remove As(III) in a competitive metal ions system including Pb +2 , Cd +2 , and Ca +2 , making it a suitable adsorbent to tackle contaminated water.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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