A magnetically recyclable lignin-based bio-adsorbent for efficient removal of Congo red from aqueous solution
Article
Zong, Enmin, Fan, Runfang, Hua, Hao, Yang, Jiayao, Jiang, Shengtao, Dai, Jinfeng, Liu, Xiaohuan and Song, Pingan. 2023. "A magnetically recyclable lignin-based bio-adsorbent for efficient removal of Congo red from aqueous solution." International Journal of Biological Macromolecules. 226, pp. 443-453. https://doi.org/10.1016/j.ijbiomac.2022.11.317
| Article Title | A magnetically recyclable lignin-based bio-adsorbent for efficient removal of Congo red from aqueous solution |
|---|---|
| ERA Journal ID | 2223 |
| Article Category | Article |
| Authors | Zong, Enmin, Fan, Runfang, Hua, Hao, Yang, Jiayao, Jiang, Shengtao, Dai, Jinfeng, Liu, Xiaohuan and Song, Pingan |
| Journal Title | International Journal of Biological Macromolecules |
| Journal Citation | 226, pp. 443-453 |
| 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.2022.11.317 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0141813022028823 |
| Abstract | It has been always attractive to design a sustainable bio-derived adsorbent based on industrial waste lignin for removing organic dyes from water. However, existing adsorbent strategies often lead to the difficulties in adsorbent separation and recycling. Herein, we report a novel magnetically recyclable bio-adsorbent of Mg(OH)2/Fe3O4/PEI functionalized enzymatic lignin (EL) composite (EL-PEI@Fe3O4-Mg) for removing Congo red (CR) by Mannish reaction and hydrolysis-precipitation. The Mg(OH)2 and PEI functionalized EL on the surface act as active sites for the removal of CR, while the Fe3O4 allows for the easy separation under the help of a magnet. As-obtained EL-PEI@Fe3O4-Mg forms flower-like spheres and has a relatively lager surface area of 24.8 m2 g−1 which is 6 times that of EL. The EL-PEI@Fe3O4-Mg exhibits a relatively high CR adsorption capacity of 74.7 mg g−1 which is 15 times that of EL when initial concentration is around 100 mg L−1. And it can be easily separated from water by applying an external magnetic field. Moreover, EL-PEI@Fe3O4-Mg shows an excellent anti-interference capability according to the results of pH values and salt ions influences. Importantly, EL-PEI@Fe3O4-Mg possesses a good reusability and a removal efficiency of 92 % for CR remains after five consecutive cycles. It is illustrated that electrostatic attraction, π-π interaction and hydrogen binding are primary mechanisms for the removal of CR onto EL-PEI@Fe3O4-Mg. This work provides a novel sustainable strategy for the development of highly efficient, easy separable, recyclability bio-derived adsorbents for removing organic dyes, boosting the efficient utilization of industrial waste lignin. |
| Keywords | Congo red removal; Magnetic; Enzymatic lignin ; Polyethyleneimine; Magnesium hydroxide |
| ANZSRC Field of Research 2020 | 340503. Organic chemical synthesis |
| 340204. Inorganic green chemistry | |
| 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 | |
| Zhejiang University of Science and Technology, China | |
| Centre for Future Materials | |
| School of Agriculture and Environmental Science |
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