Chemical characterization of barks from Picea abies and Pinus sylvestris after fractioning into different particle sizes

Miranda, Isabel; Gominho, Jorge; Mirra, Inês; Pereira, Helena

doi:10.1016/j.indcrop.2011.10.035

Cited by 141 publications

(93 citation statements)

References 26 publications

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“…The chemical differences of the bark fractions are related to the bark's anatomical features, since the grinding behaviour depends on the structural characteristics and the fractions may therefore differ in composition (Vázquez et al 2001;Miranda et al 2012Miranda et al , 2013Baptista et al 2013). In the case of G. glabra, bark has a rather homogeneous structure, with a very small proportion of rhytidome (Fig.…”

Section: Effect Of Particle Size On Chemical Composition Of Barkmentioning

confidence: 99%

Bark Characterisation of the Brazilian Hardwood Goupia glabra in Terms of Its Valorisation

Carmo¹,

Miranda²,

Quilhó³

et al. 2016

BioResources

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The bark of Goupia glabra trees grown in a native forest area in the Amazon region of Brazil was anatomically and chemically characterised for potential use as a chemical source for bio-refineries. The bark is silvery-grey to reddish-grey, with a scaly rhytidome composed of 2 to 3 periderms with a small phellem content. The phloem has abundant sieve tube members and a conspicuous presence of sclerified nodules of fibersclereids or sclereids; no fibers were observed. The bark had the following average composition (dry mass): 5.2% ash, 24.6% total extractives, 1.1% suberin, and 43.8% total lignin. The polysaccharide composition showed a high ratio of xylan hemicelluloses to cellulose. The ethanol-water bark extract showed high antioxidant capacity. The chemical characterisation of different granulometric fractions showed that extractives were present preferentially in the finest fractions, particularly with enrichment in ethanol solution.

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Section: Effect Of Particle Size On Chemical Composition Of Barkmentioning

confidence: 99%

Bark Characterisation of the Brazilian Hardwood Goupia glabra in Terms of Its Valorisation

Carmo¹,

Miranda²,

Quilhó³

et al. 2016

BioResources

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“…They are necessary to enable low panel density (Miranda et al 2012;Kain et al 2012). To bind these particles, 8-10% UF or tannin resin is used.…”

Section: Introductionmentioning

confidence: 99%

Larch (Larix decidua) bark insulation board: interactions of particle orientation, physical–mechanical and thermal properties

et al. 2017

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The current trend for sustainable utilisation of limited resources is stimulating the scientific research for previously neglected raw materials that could also be used for new value added products. Bark, which is a natural insulation material of trees, could be used as technical insulation material. This paper focuses on the effects of particle orientation in light larch (Larix decidua) bark insulation boards on their physical-mechanical and thermal properties. The experimental design is based on the variation of the particle orientation (orthogonal or parallel to the panel plane) and the board density (200-500 kg/ m 3 ). The mechanical properties, water absorption, thickness swelling and thermal conductivity of the boards were tested. The results showed a significant influence of the particle orientation and the density on the measured properties of the bark panels. This implies that the bark particle orientation is an important factor when producing insulation panels with specific characteristics. Suggestions for efficient use of bark particleboard are given.

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“…The adsorption was higher with smaller particles because of the higher surface area, but the adsorption might also have been favored by the mineral content of smaller particles. Miranda et al (2012Miranda et al ( , 2013 reported that smaller bark particles have higher mineral contents than bigger particles in pine, eucalypt, birch and spruce barks. Gloaguen and Morvan (1997) Scientific names in parentheses indicate probable species; in the corresponding references, the species was not mentioned…”

Section: Critical Evaluation Aspectsmentioning

confidence: 99%

Heavy metals removal in aqueous environments using bark as a biosorbent

Şen

Pereira

Olivella

et al. 2014

Int. J. Environ. Sci. Technol.

100

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Tree bark is among the widely available and low-cost sorbents for metal adsorption in aqueous environments. A state-of-the-art review is compiled carrying out a comprehensive literature search on the biosorption of heavy metals in solution onto different bark species, including a characterization of bark structure and chemistry. The results indicate that biosorption has been gaining importance for bark valorization purposes. Promising heavy metal uptake values have already been attained using different bark species. These values are comparable to those obtained with commercial activated carbons. Bark has a cost advantage over activated carbon and can be used without any pretreatment. Thus, bark offers a green alternative to remove heavy metals from industrial waters. A brief survey of the chemical composition and structure of different bark species is presented. Suggestions are made to improve screening of bark species for specific heavy metal ions sorption.

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Chemical characterization of barks from Picea abies and Pinus sylvestris after fractioning into different particle sizes

Cited by 141 publications

References 26 publications

Bark Characterisation of the Brazilian Hardwood Goupia glabra in Terms of Its Valorisation

Bark Characterisation of the Brazilian Hardwood Goupia glabra in Terms of Its Valorisation

Larch (Larix decidua) bark insulation board: interactions of particle orientation, physical–mechanical and thermal properties

Heavy metals removal in aqueous environments using bark as a biosorbent

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