Green Nanocellulose/PEI‐Grafted Magnetic Nanoparticles for Effective Removal of Heavy Metal Ions

Green Nanocellulose/PEI‐Grafted Magnetic Nanoparticles for Effective Removal of Heavy Metal Ions

Chemistry – An Asian Journal

10.1002/asia.202300842

http://dx.doi.org/10.1002/asia.202300842

Thenapakiam Sathasivam, Lim Kang Brian, Ingrid Marie Andersen, Hui Ru Tan, Zheng Zhang, Tingting Wu, Hooi Hong Lau, Qiang Zhu, Dan Kai

31 October 2023

Sathasivam, T., Kang Brian, L., Andersen, I. M., Ru Tan, H., Zhang, Z., Wu, T., Hong Lau, H., Zhu, Q., & Kai, D. (2023). Green Nanocellulose/PEI‐Grafted Magnetic Nanoparticles for Effective Removal of Heavy Metal Ions. Chemistry – An Asian Journal, 18(24). Portico. https://doi.org/10.1002/asia.202300842

AbstractIn response to the pressing issue of water pollution caused by heavy metal ions, there is a growing demand for green adsorbents that can effectively remove these contaminants while being easy to separate and regenerate. A novel magnetic composite was synthesized by bonding amino‐functionalized Fe3O4−SiO2 magnetic particles (MNP‐NH2) to polyethyleneimine (PEI)‐grafted cellulose nanofibers (CNF). The modification of CNF with PEI through a peptidic coupling reaction resulted in the uniform dispersion and strong attachment of MNP‐NH2 particles (286.7 nm) onto the PEI‐CNF surface. This composite exhibited exceptional adsorption capabilities for heavy metals, achieving 16.73 mg/g for Pb, 16.12 mg/g for Cu, and 12.53 mg/g for Co. These remarkable adsorption capacities are attributed to the complex interactions between the metal ions and the amino, carboxyl, and hydroxyl groups on the surface of PEI‐CNF‐MNP. The introduction of PEI significantly enhanced the adsorption capacities, and the adsorption sequence (Pb(II)>Cu(II)>Co(II)) can be explained by differences in ionic radius and surface complexation strength. Langmuir isotherm and pseudo‐second‐order kinetic models described the adsorption process, while Na2EDTA was proved effective for desorption with high recovery rates. This magnetic composite holds promise for treating heavy metal‐contaminated wastewater due to its impressive performance.

Publisher Copyright

This research / project is supported by the ASTAR - MTC Individual Research Grants
Grant Reference no. : M22K2c0085

This is the peer reviewed version of the following article: Sathasivam, T., Kang Brian, L., Andersen, I. M., Ru Tan, H., Zhang, Z., Wu, T., Hong Lau, H., Zhu, Q., & Kai, D. (2023). Green Nanocellulose/PEI‐Grafted Magnetic Nanoparticles for Effective Removal of Heavy Metal Ions. Chemistry – An Asian Journal, 18(24). Portico. https://doi.org/10.1002/asia.202300842, which has been published in final form at 10.1002/asia.202300842. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

https://oar.a-star.edu.sg/communities-collections/articles/19750

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