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Deinking of recycled paper by coupling of the enzyme endo-β-1,4-D-glucanasa and the cellulose, and by using a laboratory flotation column

Published online by Cambridge University Press:  27 October 2020

Jeovani González P.  and
Ramiro Escudero G Open the ORCID record for Ramiro Escudero G [Opens in a new window]
Jeovani González P.
Affiliation:
Institute of Research in Metallurgy and Materials. Universidad Michoacana de San Nicolás de Hidalgo. Santiago Tapia 403, C.P. 58000. Morelia, Michoacán, México. [email protected]; [email protected]
Ramiro Escudero G*
Affiliation:
Institute of Research in Metallurgy and Materials. Universidad Michoacana de San Nicolás de Hidalgo. Santiago Tapia 403, C.P. 58000. Morelia, Michoacán, México. [email protected]; [email protected]
*
*Author to whom correspondence should be addressed [email protected]
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Abstract

Deinking of recycled office (MOW) paper was carried out by using a flotation column and adding separately sodium hydroxide, and the enzyme Cellulase Thricodema Sp., as defibrillators.

The de-inked cellulose fibers were characterized according to the standards of the paper industry, to compare the efficiency of the deinking of each chemical reagent used to hydrolyze the fibers and defibrillate them.

The computational simulation of the molecular coupling between the enzyme and cellulose was performed, to establish the enzyme-cellulose molecular complex and then to identify the principal amino-acids of endo-β-1,4-D-glucanase in this molecular link, which are responsible for the hydrolysis of the cellulose.

Experimental results show the feasibility to replace sodium hydroxide with the enzyme Cellulase Thricodema Sp., by obtaining deinked cellulose with similar optical and physical properties.

The use of the enzyme instead of sodium hydroxide avoids the contamination of the residual water; in addition to that, the column is operated more easily, taking into consideration that the pH of the system goes from alkaline to neutral.

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Articles
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MRS Advances , Volume 5 , Issue 52-53: Nanoscale and Quantum Materials , 2020 , pp. 2669 - 2678
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Copyright
Copyright © The Author(s), 2020, published on behalf of Materials Research Society by Cambridge University Press

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