Using Magnesium Hydroxide as Replacement of Sodium Hydroxide in Deinking of Old Newspapers and Old Magazines Mixture

Document Type : Research Paper

Authors

1 Ph.D. Candidate in Pulp and Paper Technology, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, I.R. Iran

2 Associate Professor, Department of Paper Sciences and Engineering, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, I.R. Iran

3 Assistant Professor, Department of Paper Sciences and Engineering, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, I.R. Iran

Abstract

This study was aimed to investigate the possibility of using magnesium hydroxide as an alternative for sodium hydroxide in deinking of newsprint and magazine mixture. The old newsprint and magazine mixture (ONP/OMG -70/30) was treated by magnesium hydroxide at three levels: 1, 1.5 and 2 percent (based on oven dried pulp weight), for 20 min. Optical and mechanical properties and effluent COD load were compared to those of control and NaOH treated samples. Results showed that effluent COD load of Mg(OH)2 chemical treatments was less than that of NaOH treatment. Also, results indicated that 1.5% Mg(OH)2 treatment, which was done in pulp deinking, had better results compared to other treatments and also NaOH treatment. In the other words, it is the best treatment for both optical and mechanical properties. Thus, substitution of sodium hydroxide by magnesium hydroxide for deinking of newsprint and magazine wastepaper suggested

Keywords

References

 
[1].Ghasemian, A., Khaliligashtroodkhani, A., and Ali Abadi, M. (2008). The Role and Place of Paper Recycling in Cellulosic Raw Materials Supply for Local Pulp and Paper Industries. The 1th Iranian Conference on Supplying Raw Materials and Development of Wood and Paper Industries.
[2]. Hubbe, M.A., Venditti, R.A., and Rojas, O.J. (2007). What happens to cellulosic fibers during papermaking and recycling? A review. Bioresources, 2(4): 739-788.
[3]. Latibari, A., Khosravani, A., and Rahmaninia, M. (2007). Paper Recycling Technology. Aieej Publication. 221-230
[4]. Harrison, R., Parrish, T., Gibson, A, Knapp, C., Wajer, M., and Johnsin, D. (2008). Refiner bleaching with magnesium hydroxide Mg(OH)2 and hydrogen peroxide. TAPPI Journal, 4(6) 16-20.
[5]. Johnson, D.A., Park, S., Genco, J.M., Gibson, A., Wajer, M., and Branch, B. (2002). Hydrogen peroxide bleaching of TMP pulps using Mg(OH)2. TAPPI Pulping Conference Proceeding.
[6]. Zeinaly, F., Shakhes, J., DehghaniFirozabadi, M., and Shakery, A. (2009). Hydrogen peroxide bleaching of CMP pulp using magnesium hydroxide. BioResources, 4(4): 1409-1416.
[7]. Li, Z., Court, G.D., Belliveau, R., Crowell, M., Murphy, R., Gibon, A., Wajer, M., Branch, B., and Ni, Y. (2005). Using magnesium hydroxide Mg(OH)2 as the alkali source in peroxide bleaching at Iriving Paper. Pulp and Paper Canada, 106 (6): 24-28.
[8]. Suess, J.U., Del Grosso, M., Schmidt, K., and Hopf, B. (2001). Option for bleaching mechanical pulp with a lower COD load. APPITA Proceeding General Conference, Hobart, Australia. 419-425.
[9]. Stack, k., Trlat. J., andRichrdsonI, D. (2005). Ink detachment and redeposition alkali flotation deinking systems. Appita Journal, 58(4): 297-301.
[10]. Ghasemi, S., Eshkiki, R., Fatehi, P., and Ni, Y. (2010). Impact of acid washing and chelation on Mg(OH)2 based hydrogen peroxide bleaching of mixed hardwood CMP at a high consistency. BioResources, 5(4): 2258-2267.
[11]. Aryaie Monfared, M.H., Resalati, H., and Ghasemian, A. (2012). Enzymatic deinking of office waste papers in the comparison with conventional chemical method: part1-appearance and optical properties of pulp, Journal of Wood and Forest Science and Technology. 18(14): 59-76.
Forest and Wood Products
Volume 68, Issue 3 - Serial Number 3
October 2015
Pages 517-529

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