Si Rongrong, Pu Junwen, Luo Honggang, Wu Chaojun, Duan Gaigai
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Polymers (Basel). 2022 Dec 14;14(24):5479. doi: 10.3390/polym14245479.
Heavy metal ions in industrial sewage constitute a serious threat to human health. Nanocellulose-based adsorbents are emerging as an environmentally friendly material platform for heavy metal ion removal based on their unique properties, which include high specific surface area, excellent mechanical properties, and biocompatibility. In this review, we cover the most recent works on nanocellulose-based adsorbents for heavy metal ion removal and present an in-depth discussion of the modification technologies for nanocellulose in the process of assembling high-performance heavy ion adsorbents. By introducing functional groups, such as amino, carboxyl, aldehyde, and thiol, the assembled nanocellulose-based adsorbents both remove single heavy metal ions and can selectively adsorb multiple heavy ions in water. Finally, the remaining challenges of nanocellulose-based adsorbents are pointed out. We anticipate that this review will provide indispensable guidance on the application of nanocellulose-based adsorbents for the removal of heavy metal ions.
工业污水中的重金属离子对人类健康构成严重威胁。基于纳米纤维素的吸附剂因其独特的性能，如高比表面积、优异的机械性能和生物相容性，正成为一种用于去除重金属离子的环保材料平台。在这篇综述中，我们涵盖了基于纳米纤维素的重金属离子去除吸附剂的最新研究工作，并对高性能重离子吸附剂组装过程中纳米纤维素的改性技术进行了深入讨论。通过引入氨基、羧基、醛基和巯基等官能团，组装而成的基于纳米纤维素的吸附剂既能去除单一重金属离子，又能选择性吸附水中的多种重金属离子。最后，指出了基于纳米纤维素的吸附剂面临的剩余挑战。我们预计，这篇综述将为基于纳米纤维素的吸附剂在去除重金属离子方面的应用提供不可或缺的指导。
