Controlling the release of wood extractives into water bodies by selecting suitable eucalyptus species

Kilulya, Kessy F.; Msagati, Titus A.M.; Mamba, Bhekie B.; Ngila, J. Catherine; Bush, Tamara Reid

doi:10.1016/j.pce.2012.09.012

Cited by 7 publications

(6 citation statements)

References 16 publications

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“…The FT-IR spectra were recorded with a FTIR-650 scanning from 4000 to 400 cm -1 with a resolution of 2 cm -1 using KBr pellets at room temperature. Extractives were separated according to the previously reported literature [6]. The identification of the extractives was performed using GS/MS.…”

Section: Qualitative and Quantitative Determination Of Compositions Imentioning

confidence: 99%

“…In colloidal resin particles, steryl esters and triglycerides, which are the most hydrophobic components of the extractives, form the hydrophobic core while fatty and resin acids and sterols form the thin surface layer of the particles. The carboxyl groups of fatty and resin acids are orientated toward the aqueous phase [5][6][7][8]. The particles are negatively charged in the pH 2-11.…”

Section: Introductionmentioning

confidence: 99%

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The water resistance of corrugated paper improved by lipophilic extractives and lignin in APMP effluent

et al. 2015

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In this article, quantitative determination of compositions (hemicellulose and lignin) in the APMP (alkaline peroxide mechanical pulping) effluent was done. The MTBE (methyl tert-butyl ether) extracts of the APMP effluent (extractives) were analyzed by GC/MS (gas chromatography-mass spectrometry). The result of GC/MS showed that fatty acids (C14-C28) and their esters, sterols were the main components of extractives. Based on the qualitative and quantitative determination of compositions in APMP effluent and the mechanism of surface sizing, APMP effluent combined with starch and Al 2 (SO 4 ) 3 was used as corrugated paper surface sizing agent; the water resistant mechanism of which was explored. Combined effects of lignin (extractives) and Al 3? played a major role in hydrophobic properties of corrugated paper, the Cobb values of corrugated paper sized by which were 35.2 and 39.8 g/m 2 , respectively. The water contact angles were 126.6°and 115.6°at 120 s, respectively. No previous studies or article on APMP effluent improving the water resistance of corrugated paper have been reported.

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Section: Qualitative and Quantitative Determination Of Compositions Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The water resistance of corrugated paper improved by lipophilic extractives and lignin in APMP effluent

et al. 2015

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“…In this work, the fatty acids represent the higher areas in the rose gum extractives composition (both in the sapwood and in heartwood) and are the main constituents of this species (Barbosa et al 2005, Kilulya et al 2012, Silvestre et al 2001). …”

Section: Chemical Evaluation Of Extractivesmentioning

confidence: 86%

Wood under fresh water: Effect on the chemical properties and on decay resistance

Lourençon

Santos

Labidi

et al. 2016

Maderas, Cienc. tecnol.

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This study aimed to evaluate the effect of waterlogging on the chemical properties and on decay resistance of two fast-growing eucalypt species. Samples of spotted gum and rose gum wood were placed underwater and taken out at different times: after 4, 8 and 12 months. Chemical properties were performed via wet chemical quantification (Tappi standards), monomeric sugars by HPLC, and qualitative evaluation of extractives by Py-GC/MS and ATR-IR spectroscopy; biological performance was investigated using Trametes versicolor and Gloeophyllum trabeum rot fungi. The results showed slight changes to the chemical properties of both wood species, with an increase in lignin represented by the reduction of sugars due to waterlogging. Both species showed higher susceptibility to Gloeophyllum trabeum mainly in the sapwood, with no influence on decay resistance due the waterlogging.

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“…The contents of hemicellulose and lignin were determined by gravimetric method. Extractives were separated according to the previously reported literature . The identification of the extractives was performed using gas chromatography combined with mass spectrometry (GS/MS).…”

Section: Methodsmentioning

confidence: 99%

Grafted Copolymerization Modification of Hemicellulose Directly in the Alkaline Peroxide Mechanical Pulping (APMP) Effluent and Its Surface Sizing Effects on Corrugated Paper

Dong

Hui-ren

Yang

et al. 2014

Ind. Eng. Chem. Res.

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In this work, the graft copolymerization of acrylamide (AM) and methacryloyloxy ethyl trimethyl ammonium chloride (DMC) with the hemicellulose in the alkaline peroxide mechanical pulping (APMP) effluent was investigated using the Fenton agent (FeSO 4 /H 2 O 2 ) as an initiator. The effects of the reaction conditions on the characteristics of the graft copolymers were studied. On the basis of the graft copolymer characterization, the optimum conditions were as follows: total active ingredient concentration 31%, reactive temperature 50°C, amount of the initiator 0.4%, ratio of H 2 O 2 to FeSO 4 1:1, molar ratio of DMC to AM 1.5:20 and optimum percentages of C, G, GE, and viscosity are 65%, 246%, 98%, and 5020 cP, respectively. Structure elucidation of the graft copolymer was obtained by 1 H NMR spectroscopy and FT-IR. Gel-permeation chromatography (GPC) was employed to determine the molecular mass and molecular mass distribution of hemicellulose and graft copolymer. The thermal degradation properties of hemicellulose and the graft copolymers were measured by thermo gravimetric analysis (TGA). The graft copolymer was subsequently used as a corrugated paper surface sizing agent, which can significantly improve the physical strength and water resistance of corrugated paper.

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Controlling the release of wood extractives into water bodies by selecting suitable eucalyptus species

Cited by 7 publications

References 16 publications

The water resistance of corrugated paper improved by lipophilic extractives and lignin in APMP effluent

The water resistance of corrugated paper improved by lipophilic extractives and lignin in APMP effluent

Wood under fresh water: Effect on the chemical properties and on decay resistance

Grafted Copolymerization Modification of Hemicellulose Directly in the Alkaline Peroxide Mechanical Pulping (APMP) Effluent and Its Surface Sizing Effects on Corrugated Paper

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