Comparative Study on Vanadium(V) Adsorption Performance of Supported Ionic Liquid Synthesized by Physical Impregnation and Chemical Grafting
SSRN, ISSN: 1556-5068
2024
- 67Usage
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
This study loaded ionic liquids (ILs) onto chloromethylated polystyrene resins using physical impregnation and chemical grafting. The resulting ionic liquid-loaded resins were characterized using SEM-EDS, FTIR, and NMR spectral analyses, confirming the successful preparation of both the physical impregnation resin (PIR) and the chemical grafting resin (CGR). The study compared the influencing conditions, cyclicity, selectivity, and adsorption mechanism of PIR and CGR on adsorption vanadium(V). Under optimum adsorption conditions, CGR exhibited significantly higher adsorption capacity (261mg/g) than PIR (27mg/g). Regarding adsorption selectivity, the adsorption capacity of both resins for V(V) is much more than that for impurity ions (Al and Fe). However, the CGR had much more significant separation coefficients for Fe and Al (65.3 and 45.4) compared to the PIR (6.3 and 10.6). Furthermore, the CGR exhibited a cycling capacity 1.5 times greater than the PIR, maintaining an adsorption capacity of over 98% of the initial value within 12 cycles. Based on the adsorption mechanism, the two loaded resins conformed to the Langmuir adsorption isothermal model and the pseudo-second-order kinetic model. The indicates the adsorption processes were monolayer chemisorption. The FTIR and NMR analysis results indicate that ILs in CGR are loaded onto the resin surface through chemical bonding. In PIR, the ILs are uniformly adsorbed on the resin through weak and unstable electrostatic force. In this study, the adsorption performance, selectivity, and adsorption stability of the CGR were significantly superior to those of the PIR.
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