Hyperbranched polyamide–functionalized sodium alginate microsphere as a novel adsorbent for the removal of antimony(III) in wastewater
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In order to enhance the removal of Sb(III) in wastewater, hyperbranched polyamide–functionalized sodium alginate (HA@SA) microsphere was prepared by grafting of hyperbranched polyamide (HA) on the surface of sodium alginate (SA) microsphere. Adsorption properties of Sb(III) were investigated via static and dynamic adsorption tests. The cycling reusability of HA@SA microspheres was explored through adsorption-desorption tests. The changes of HA@SA microspheres before and after adsorption were characterized by FT-IR, SEM-EDS, and XPS. Results showed that the maximum Sb(III) adsorption capacity of HA@SA microspheres reached up to 195.7 mg/g, improved by 1.16 times in comparison with SA microspheres. The Sb(III) adsorption processes of HA@SA microspheres were depicted by pseudo-second-order kinetics and the Langmuir isotherm models with accuracy. It covered a homogeneous single-layer adsorption controlled by chemisorption along with exotherm spontaneously. After recycling for 8 times, the adsorption capacity of HA@SA microspheres still retained higher than 90% of the original value.
KeywordsHyperbranched polyamide Sodium alginate Adsorbent Adsorption Antimony ion
This work was supported by the National Natural Science Foundation of China (No. 51703202), Key Research and Development Program of Science and Technology Department of Zhejiang Province (No. 2018C03004), China Postdoctoral Science Foundation (No. 2017M621975), and Zhejiang Postdoctoral Science Preferred Funding Project.
- Council of the European Union (1998) Council Directive 98/83/EC of 3 November 1998 on the quality of water intended for human consumption. Off J Eur Communities 330:32–54Google Scholar
- Pakade V, Cukrowska E, Darkwa J, Torto N, Chimuka L (2011) Selective removal of chromium(VI) from sulphates and other metal anions using an ion-imprinted polymer. Water SA 37:529–538Google Scholar