Nanoscale cellulose materials obtained from the chemical treatment of biomass are very effective agents for the removal of toxic species from water, including heavy metal ions. Professor Benjamin S. Hsiao and his collaborators at Stony Brook University have developed a simple, inexpensive and environmentally friendly approach to preparing nanostructured cellulose for water purification, based on a nitro-oxidation reaction carried out on biomasses of diverse origins. In addition to providing cellulose with a superior affinity for dissolved toxic ions, this process yields nitrogen-rich salts as byproducts, which can be recovered and used as fertilizers.
Efficient Removal of Arsenic Using Zinc Oxide Nanocrystal Decorated Regenerated Microfibrillated Cellulose Scaffolds
Stony Brook University researchers Dr. Priyanka Sharma, Dr. Sunil K. Sharma and Richard Antoine led by Professor Hsiao demonstrated for the first time a unique micro-fibrous composite system, containing ZnO nanocrystals adhered in a regenerated micro-fibrillated cellulose scaffold generated from jute cellulose. In general, the zinc oxide crystallites were reported to being effective adsorption medium for removal of arsenic ions from water, where the best removal efficiency was achieved at the neutral condition. Furthermore, excellent binding stability between zinc oxide nanocrystals and the R-MFC scaffold was found, where very low release of ZnO (ppb) took place during the arsenic ions adsorption. The unique format of ZnO/R-MFC nanocomposite also significantly reduces the energy consumption for secondary contaminant removal.
Dr.Tomas Rosen is among the winners of the NSLS-ll and CFN Users’ Meeting Poster Session!