Abstract
Among the Cu(II) removal methods, adsorption is a favorable technique and has attracted large attention because of its effectiveness and low cost. In quest of seeking for a favorable adsorbent with a high Cu(II) adsorption capacity and excellent reusability, researchers have paid much attention to hydrogels with three-dimensional networks. In this study, a novel hydrogel (P(AMPS-co-VDT) hydrogel) based on free-radical polymerization was synthesized with ionic monomer sodium 2-acrylamido-2-methylpropane sulfate (AMPS-Na+) and 2-vinyl-4, 6-diamino-1, 3, 5-triazine (VDT) and applied for Cu(II) adsorption in aqueous solutions. The hydrogel was characterized for swelling performance, surface morphology, functional groups, thermal gravimetric behavior, and elements. The maximum Cu(II) adsorption capacity (175.75 mg/g) was relatively high compared with other hydrogels. The P(AMPS-co-VDT) hydrogel also was found to have a relatively good Cu(II) desorption and reuse behavior. The adsorption mechanism could be chelation and ion exchange. This work provides a new hydrogel for effective Cu(II) removal in the future.
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Acknowledgments
The authors also thank the Analytical and Testing Center of the Huazhong University of Science and Technology for related analyses.
Funding
National Natural Science Foundation of China (Grants No. 51608216, 51778256, and 51908432), Natural Science Foundation of Hubei Province (Grants No. 2015CFB276, and 2018CFB397), and the Fundamental Research Funds for the Central Universities, HUST (Grants No. 2016YXMS289 and 2017KFYXJJ216) provided financial support.
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Wan, J., Chen, L., Li, Q. et al. A novel hydrogel for highly efficient adsorption of Cu(II): synthesis, characterization, and mechanisms. Environ Sci Pollut Res 27, 26621–26630 (2020). https://doi.org/10.1007/s11356-020-09082-8
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DOI: https://doi.org/10.1007/s11356-020-09082-8