Titanium dioxide nanoparticles functionalized chitosan toward bio-based antibacterial adsorbent for enhanced phosphate capture
Article
Zong, Enmin, Zhang, Chengyi, Wu, Shaoning, Gao, Yijun, Yang, Jiayao, Liu, Xiaohuan and Song, Pingan. 2023. "Titanium dioxide nanoparticles functionalized chitosan toward bio-based antibacterial adsorbent for enhanced phosphate capture." International Journal of Biological Macromolecules. 241. https://doi.org/10.1016/j.ijbiomac.2023.124511
| Article Title | Titanium dioxide nanoparticles functionalized chitosan toward bio-based antibacterial adsorbent for enhanced phosphate capture |
|---|---|
| ERA Journal ID | 2223 |
| Article Category | Article |
| Authors | Zong, Enmin, Zhang, Chengyi, Wu, Shaoning, Gao, Yijun, Yang, Jiayao, Liu, Xiaohuan and Song, Pingan |
| Journal Title | International Journal of Biological Macromolecules |
| Journal Citation | 241 |
| Article Number | 124511 |
| Number of Pages | 11 |
| Year | 2023 |
| Publisher | Elsevier |
| Place of Publication | Netherlands |
| ISSN | 0141-8130 |
| 1879-0003 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.ijbiomac.2023.124511 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0141813023014058 |
| Abstract | Developing an eco-friendly, sustainable and antibacterial adsorbent is significant for actual water treatment. Herein, a bio-based antibacterial adsorbent based on titanium dioxide (TiO2) nanoparticles functionalized chitosan (CS) was prepared through an in-situ hydrolysis strategy using titanium oxysulfate as the source of TiO2. The as-obtained CS/TiO2 nanocomposite was characterized by a variety of analytical techniques. According to the Langmuir mode, the adsorption capacity of CS/TiO2 reached 23.64 mg P g−1, almost 8 times higher than that of CS. In addition, the normalized adsorption capacity (adsorption value per Ti) of CS/TiO2 was calculated to be 102.68 mg P g−1 Ti−1, much higher than pure TiO2 (60.11 mg P g−1 Ti−1). Moreover, CS/TiO2 exhibited a highly selective capacity for phosphate removal in the presence of competing anions, and showed high stability in a wide pH range of 3.0–8.0. When the phosphate concentration was 2.0 mg P L−1, the removal efficiency of phosphate reached 99.5 % and the residual concentration was only 10 μg P L−1, which meets the USEPA standards for eutrophication prevention and control. In addition, after treatment by CS/TiO2, the phosphate concentration of two sewage water samples decreased from 1.50 and 1.0 mg P L−1 to <0.10 mg P L−1, meeting the standard of level II water based on the Environmental Quality Standard of China (GB3838–2002). Ligand exchange and electrostatic interactions are mainly responsible for phosphate adsorption by CS/TiO2. Furthermore, the CS/TiO2 nanocomposites exhibited excellent antibacterial activity, which could avoid biofouling contamination caused by microorganisms. Benefiting from the above advantages, the as-designed CS/TiO2 nanocomposite has great potential as a bio-based antibacterial adsorbent for phosphate capture or removal from wastewater. |
| Keywords | Antibacterial |
| ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
| 340305. Physical properties of materials | |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Taizhou University, China |
| Nanjing University, China | |
| Zhejiang A & F University, China | |
| Centre for Future Materials |
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