Correlates of the yield of chemical pulp, lignin and the extractive materials of tropical hardwoods

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dc.contributor.authorNdukwe, N.A.
dc.contributor.authorOkiei, W.O.
dc.contributor.authorAlo, B.I.
dc.date.accessioned2019-08-23T14:54:54Z
dc.date.available2019-08-23T14:54:54Z
dc.date.issued2012-10-02
dc.description.abstractThe aim of this investigation is to correlate the percentage yields of pulp of twenty tropical hardwood species with their lignin and extractive contents. The hardwoods studied include Abura (Hallea ciliata), Afara (Terminalia superba), Agba (Entada gigas), Akomu (Pycnanthus angolensis), Akun (Uapaca guineensis), Eki-Eki (Lophira alata), Erimado (Ricindendron heudelotii), Erun-obo (Erythropleum suaveolens), Iroko (Milicia exelsa), Itako (Strombosia pustulata), Itara (Sacoglottis gabonensis), Mahogany (Khaya ivorensis), Masonia (Masonia altissima), Obeche (Triplochiton scleroxylon), Odoko (Ipomoea asarifolia), Ofun (Avicennia germinans), Okilolo (Symphona globulifera), Opepe (Nauclea diderrichii), Oporoporo (Pterygota macrocarpa) and Some (Ceiba pentadra). Hardwood species such as H. ciliata, T. superba and S. globulifera that gave pulp yield of 50% were found to have the lowest lignin contents in the range of 19.0 to 28.4% and extractives contents of 4.8 to 6.0%. The results obtained showed that there is significant negative correlation (p < 0.01 and r = -0.84) between the percentage pulp yield and the lignin contents as well as between percentage pulp yield and contents of extractive materials (p < 0.01, r = -0.811). However, a significant positive correlation (p < 0.01, r = 0.649) between the percentage lignin contents and the extractive components of the wood samples was observed. The chemical integrity of the pulp, lignin and extractive contents of the wood samples was confirmed by infra-red (i.r.) spectroscopic studies.en_US
dc.identifier.citationNdukwe, N. A., Okiei, W. O., & Alo, B. I. (2012). Correlates of the yield of chemical pulp, lignin and the extractive materials of tropical hardwoods. African Journal of Agricultural Research, 7(40), 5518-5524.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/4654
dc.language.isoenen_US
dc.publisherAfrican Journal of Agricultural Researchen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES::Chemistry::Analytical chemistryen_US
dc.subjectTropical hardwood speciesen_US
dc.subjectpulp yielden_US
dc.subjectlignin contenten_US
dc.subjectextractivesen_US
dc.titleCorrelates of the yield of chemical pulp, lignin and the extractive materials of tropical hardwoodsen_US
dc.typeArticleen_US
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