Effect of deinking and peroxide bleaching on the physical properties of recycled newspapers
saad, A., Owda, M., Ibrahim, A., bassiouni, M. (2020). Effect of deinking and peroxide bleaching on the physical properties of recycled newspapers. EKB Journal Management System, 31(Issue 2-A), 9-18. doi: 10.21608/absb.2020.35942.1070
Al-ghazaly saad; Medhat Elsayed Owda; Ahmed Galal Ibrahim; Mohamed bassiouni. "Effect of deinking and peroxide bleaching on the physical properties of recycled newspapers". EKB Journal Management System, 31, Issue 2-A, 2020, 9-18. doi: 10.21608/absb.2020.35942.1070
saad, A., Owda, M., Ibrahim, A., bassiouni, M. (2020). 'Effect of deinking and peroxide bleaching on the physical properties of recycled newspapers', EKB Journal Management System, 31(Issue 2-A), pp. 9-18. doi: 10.21608/absb.2020.35942.1070
saad, A., Owda, M., Ibrahim, A., bassiouni, M. Effect of deinking and peroxide bleaching on the physical properties of recycled newspapers. EKB Journal Management System, 2020; 31(Issue 2-A): 9-18. doi: 10.21608/absb.2020.35942.1070

Effect of deinking and peroxide bleaching on the physical properties of recycled newspapers

Al-Azhar Bulletin of Science
Article 2, Volume 31, Issue 2-A, December 2020, Page 9-18  XML PDF (524.62 K)
Document Type: Original Article
DOI: 10.21608/absb.2020.35942.1070
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Authors
Al-ghazaly saad email 1; Medhat Elsayed Owda2; Ahmed Galal Ibrahimorcid 3; Mohamed bassiouni4
1chemistry department,faculty of science , ,Al-Alzhar university, Cairo, Egypt
2Lecturer in Chemistry department. Faculty of science. Al azhar university
3Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
4professor of organic-applied chemistry, faculty of science,Al-Azhar university, Cairo, Egypt.
Abstract
Paper recycling for producing a new paper that can be used from old spent paper has gained increased interest, and this process helps prevent the paper from accumulating in landfills, reducing pollution and greenhouse gas emissions. In this work old newspaper (ONP) supplied from Al-Ahram Press is de-inked by washing process using sodium hydroxide, surfactant then hydrogen peroxide was applied to bleach the recycled deinked ONP. Following single-stage bleaching, the fiber properties of the pulp (brightness, tensile, tear strength, and burst index) were determined. The Effect of hydrogen peroxide dose, consistency, and temperature on the pulp brightness were studied. The deinking step produces deinked pulp with low brightness 51.75% ISO and the single-stage peroxide bleaching applied to the deinked ONP pulp could produce pulp with brightness 64.05% ISO at 60 min, 80°C, H2O2 concentration 2% and consistency 20%. The obtained data showed that the brightness of the deinked ONP increases with increasing hydrogen peroxide dose, consistency, and temperature. Also, it was found that the tensile strength and burst index increase by increasing brightness while, tear strength decreased.
Keywords
newspaper; deinked pulp; bleaching; brightness; tensile strength
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