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Preparation of Ammoniated Cellulose Aerogel and Its Adsorption Behavior for p-Arsanilic Acid |
Received:April 21, 2022 |
DOI:10.11980/j.issn.0254-508X.2022.09.004 |
Key Words:cellulose-based aerogel polyethyleneimine adsorption p-arsanilic acid |
Fund Project:国家自然科学基金面上项目(21577018);福建船政交通职业学院科研项目(000201000-X19108002)。 |
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Abstract:A functionalized cellulose-based aerogel (Cell@PEI) with high adsorption efficiency for p-arsanilic acid (p-ASA) was fabricated by crosslinking surface ammoniated polyethyleneimine (PEI) with cellulose. The results showed that the three-dimensional massive Cell@PEI had a unique porous structure with a large specific surface area of 241.4 m2/g. Moreover, the introduction of PEI enriched the functional groups on the surface of the aerogel, enhanced the electrostatic interaction and hydrogen bonding in Cell@PEI, promoting the adsorption towards p-ASA. The adsorption capacity of Cell@PEI was 205.6 mg/g in maximum, which was in accordance with the Freundlich adsorption isotherm model and pseudo-second-order adsorption kinetics model. In addition, the removal of p-ASA was still above 70% by Cell@PEI aerogel after desorption and regeneration in NaOH solution for 5 times. |
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