Adsorption Properties of the Alkalized Accordion‐Like Ti3CN MXene for Pb(II) Ion

The presence of poisonous Pb(II) ions in water resources has raised global health concerns. Herein, the adsorption performance of accordion‐like Ti3CN MXene for Pb(II) ions was investigated for the first time. Batch experiments were carried out by varying modifications, pH values, initial Pb(II) con...

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Bibliographic Details
Published in:ChemistrySelect (Weinheim) 2024-05, Vol.9 (18), p.n/a
Main Authors: Qian, XuKun, Zhao, ZeFeng, Zhang, RuiHua, Yu, ChangBai
Format: Article
Language:English
Subjects:
Adsorption
Alkalization treatment
Pb(II) ion
Ti3CN Mxene
Wastewater
Online Access:Get full text
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Summary:The presence of poisonous Pb(II) ions in water resources has raised global health concerns. Herein, the adsorption performance of accordion‐like Ti3CN MXene for Pb(II) ions was investigated for the first time. Batch experiments were carried out by varying modifications, pH values, initial Pb(II) concentrations, adsorption time and temperatures. The results prove that the alkalized‐Ti3CN shows enhanced adsorption performance. Although the temperature effect is insignificant, the Pb(II) adsorption is strongly pH‐dependent. The maximum Pb(II) adsorption capacity of alkalized −Ti3CN is about 2.5 times higher than that of activated carbon. The adsorption ratio of Pb(II) is up to 96.6 %. The adsorption capacity increases with increasing the initial concentration of Pb(II). The alkalized‐Ti3CN adsorbs Pb(II) very quickly and the adsorption equilibrium is nearly achieved within 70 minutes. The adsorption follows the quasi‐second‐order kinetic model as well as the Langmuir model, and is mainly controlled by chemical adsorption. It is preliminarily concluded that Pb(II) replaces Na(I) of the −ONa functional groups on the alkalized‐Ti3CN surfaces. This study proves the alkalized‐Ti3CN MXene has potential application for the purification treatment of wastewater contaminated with Pb(II) ions. The adsorption capacity of Pb(II) ion for accordion‐like Ti3CN Mxene is significantly increased after alkalization treatment. The maximum adsorption capacity of the alkalized Ti3CN MXene is up to 87.4 mg ⋅ g−1, and the adsorption ratio reaches 96.6 %. The adsorption process is mainly controlled by chemical adsorption and belongs to surface monolayer adsorption.
ISSN:2365-6549
2365-6549
DOI:10.1002/slct.202305086