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Herein, we present a new process for the preparation of cellulose-chitosan foams using an aqueous lithium bromide (LiBr) solution. After obtaining hydrogels via dissolution-regeneration from an aqueous LiBr solution and methanol, cellulose-chitosan foams were prepared via solvent exchange (water → ethanol → t-butyl alcohol) followed by freeze-drying. The amino group content and elemental analysis...
The preparation of new adsorbents for heavy metals consisting of cellulose paper grafted with polyamine moieties is described. The tosylation of pristine cellulose paper allowed the subsequent displacement of the tosylated leaving groups with either ethylenediamine or spermine provided the corresponding cellulose-based polyaminated adsorbents Cell-Ed and Cell-Sperm, respectively. Optimizations related...
A novel PEI-grafted magnetic cellulose (Fe3O4/MCC-PEI) with high amino density was prepared by grafting PEI onto the surface of magnetic cellulose in NaOH/urea aqueous solvent. The embedding of Fe3O4 into cellulose provided excellent magnetic responsiveness for recycling the adsorbent in the magnetic field. The adsorbent for Cr(VI) removal from aqueous solution overcame the disadvantages of adsorbent...
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