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Response of Eucalyptus camaldulensis and Acacia mangium kraft pulp in different ECF bleaching options

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Abstract

In this study, the response of Eucalyptus camaldulensis and Acacia mangium kraft pulp to different options of ECF bleaching was investigated. Oxygen-delignified pulps of both species having similar kappa number (c.a. 12) were used. Both the pulps were prebleached using conventional ClO2 stage (D0), combined use of ClO2 and O3 (DZ), hot acid treatment before D0 (AhotD0) and hot acid treatment before (DZ) i.e., Ahot(DZ), hot ClO2 treatment (DHT) and Ahot followed by DHT (AhotDHT). All prebleached pulps were finally bleached to 90%+ ISO brightness using D1 option. The overall benefits of other options were not considerable compared to D0 and (DZ). From the ClO2 consumption point of view, for a certain species, the option Ahot(DZ) was the best. Instead of D1 in final bleaching, pressurized hydrogen peroxide (PO) was also investigated in the case of D0 and (DZ) prebleached pulps. (PO)-bleached pulp produced higher brightness stability but lower viscosity compared to D1.

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Acknowledgments

The authors are grateful to the Government of Finland for the financial support of this research work. Also sincere thanks are due to Advance Agro (Thailand) and April (Indonesia) for providing industrial chips of Eucalyptus camaldulensis and Acacia mangium, respectively.

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Authors and Affiliations

  1. Department of Chemistry, Chittagong University of Engineering and Technology, Chittagong, 4349, Bangladesh

    Md. Rezaul Karim

  2. Forestry and Wood Technology Discipline, Khulna University, Khulna, 9208, Bangladesh

    Md. Nazrul Islam

  3. FIBROM, Illansuu 3, 02210, Espoo, Finland

    Raimo O. Malinen

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  1. Md. Rezaul Karim
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  2. Md. Nazrul Islam
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  3. Raimo O. Malinen
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Correspondence to Md. Rezaul Karim.

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Karim, M.R., Islam, M.N. & Malinen, R.O. Response of Eucalyptus camaldulensis and Acacia mangium kraft pulp in different ECF bleaching options. Wood Sci Technol 45, 473–485 (2011). https://doi.org/10.1007/s00226-010-0338-2

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  • DOI: https://doi.org/10.1007/s00226-010-0338-2

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