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Cellulose nanocrystals (CNC) are high added value products which can be used in many applications. In this research, CNC were directly produced from two recycled papers: old newspapers (ONP) and 100% recycled newsprint (NP). CNC were also obtained from NP by previously isolating the cellulose particles by alkali and bleaching treatments. CNC yield and quality was assessed through lignin and ash determination,...
In this study, the impact of cutinases from Thermobifida fusca and Fusarium solani pisi on the deinking of old newsprint were evaluated for the first time. When repulped old newsprint was treated with 8 U/g of T. fusca cutinase at pH 8 and 60 $$^{\circ }$$ ∘ C for 30 min, the brightness of the deinked papers reached 42.01%. With 8 U/g F. solani cutinase at pH 8.5 and 35 $$^{\circ }$$...
Three commercial cellulases were evaluated for their effects on deinking of both fresh and artificially aged old newsprint (ONP) mixed with fresh old magazines (OMG) at a ratio of 7:3. The enzymes were added at the beginning of the repulping stage followed by incubation for up to 3h. Although these enzymes were able to detach a significant amount of ink from the ONP/OMG, cellulase deinking was less...
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