Nanocellulose refers to a family of novel cellulose materials with the nanosized (2~100 nm) cellulose microfibrils in diameter. Because of the high aspect ratio, large specific surface area, exceptional mechanical properties as well as ease for surface modification, nanocelluose has become a research focus of biosorbent materials areas. In this article, the achievements in the nanocellulose-absorbent materials in recent years are summarized, and the research progress of absorbent materials based on nanocrystalline cellulose (NCC), nanofibrillated cellulose (NFC), and bacterial cellulose (BC) in the aspects of removing dyes, heavy metal ions, CO₂ gas, and other pollutants (e.g. antibiotics, aromatic organic compounds, radioactive elements, and volatile organic compounds), are reviewed, respectively. Besides, the existing problems of nanocellulose-based adsorbent materials are discussed, and their future development prospects are presented.
Contents
1 Introduction
2 Dye adsorbents
2.1 NCC-based adsorbents
2.2 NFC-based adsorbents
2.3 BC-based adsorbents
3 Heavy metal ions adsorbents
3.1 NCC-based adsorbents
3.2 NFC-based adsorbents
3.3 BC-based adsorbents
4 CO₂ adsorbents
5 Nanocellulose-based adsorbents for other pollutants
5.1 Antibiotics adsorbents
5.2 Aromatic organic compound adsorbents
5.3 Radioactive element adsorbents
5.4 Volatile organic compound adsorbents
6 Conclusion