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Bagasse Cellulose Grafted with an Amino-Terminated Hyperbranched Polymer for the Removal of Cr(VI) from Aqueous Solution

Lookup NU author(s): Professor David XieORCiD

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Abstract

A novel bio-adsorbent was fabricated via grafting an amino-terminated hyperbranched polymer (HBP-NH₂) onto bagasse cellulose. The morphology and microstructure of the HBP-NH₂-grafted bagasse cellulose (HBP-g-BC) were characterized and its adsorption capacity for Cr(VI) ions in aqueous solutions was investigated. The rough surface structure of HBP-g-BC that is beneficial for improving the adsorption capacity was observed by scanning electron microscopy (SEM). The grafting reaction was confirmed by Fourier-transform infrared (FT-IR) spectroscopy. The adsorbent performance was shown to be better with a lower pH value, a higher adsorbent dosage, or a higher initial Cr(VI) concentration. Moreover, the kinetics study revealed that the adsorption behavior followed a pseudo-second-order model. The isotherm results showed that the adsorption data could be well-fitted by the Langmuir, Freundlich, or Temkin models. Moreover, HBP-g-BC could maintain 74.4% of the initial removal rate even after five cycles of regeneration. Thus, the high potential of HBP-g-BC as a bio-adsorbent for heavy metal removal has been demonstrated.

Publication metadata

Author(s): Xia L, Huang Z, Zhong L, Xie F, Tang CY, Tsui CP

Publication type: Article

Publication status: Published

Journal: Polymers

Year: 2018

Volume: 10

Issue: 8

Online publication date: 20/08/2018

Acceptance date: 18/08/2018

Date deposited: 23/05/2023

ISSN (electronic): 2073-4360

Publisher: MDPI

URL: https://doi.org/10.3390/polym10080931

DOI: 10.3390/polym10080931

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