Study of the variability in chemical composition of bark layers of quercus suber l. from different production areas
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TLDR
In this paper, the authors investigated the summative chemical composition of three bark layers (back, cork, and belly) of five Spanish cork samples and one cork sample from Portugal, finding that significant differences were found only for suberin and holocellulose contents: they were higher in the belly and cork than in the back.Abstract:
Cork is the bark of the cork oak tree (Quercus suber L), a renewable and biodegradable raw bioresource concentrated mainly in the Mediterranean region. Development of its potential uses as a biosorbent will require the investigation of its chemical composition; such information can be of help to understand its interactions with organic pollutants. The present study investigates the summative chemical composition of three bark layers (back, cork, and belly) of five Spanish cork samples and one cork sample from Portugal. Suberin was the main component in all the samples (21.1 to 53.1%), followed by lignin (14.8 to 31%), holocellulose (2.3 to 33.6%), extractives (7.3 to 20.4%), and ash (0.4 to 3.3%). The Kruskal-Wallis test was used to determine whether the variations in chemical composition with respect to the production area and bark layers were significant. The results indicate that, with respect to the bark layer, significant differences were found only for suberin and holocellulose contents: they were higher in the belly and cork than in the back. Based on the results presented, cork is a material with a lot of potential because of its heterogeneity in chemical composition.read more
Citations
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Journal ArticleDOI
Use of cork powder and granules for the adsorption of pollutants: a review.
Ariana M.A. Pintor,Catarina I.A. Ferreira,J.P. Pereira,Patrícia Correia,Susana P. Silva,Vítor J.P. Vilar,Cidália M.S. Botelho,Rui A.R. Boaventura +7 more
TL;DR: The state of the art on the properties of cork and cork powder and their application in adsorption technologies is reviewed and different potential lines of research not yet explored can be more easily identified.
Journal ArticleDOI
Lignin Composition and Structure Differs between Xylem, Phloem and Phellem in Quercus suber L.
Ana Lourenço,Jorge Rencoret,C. Chemetova,Jorge Gominho,Ana Gutiérrez,José C. del Río,Helena Pereira +6 more
TL;DR: These results are a first time overview of the lignin structure in xylem, phloem, and in cork (generated by cambium), in agreement with literature that reports that lign in biosynthesis is flexible and cell specific.
Journal ArticleDOI
Heavy metals removal in aqueous environments using bark as a biosorbent
TL;DR: In this paper, a state-of-the-art review is compiled carrying out a comprehensive literature search on the biosorption of heavy metals in solution onto different tree species, including a characterization of bark structure and chemistry.
Journal ArticleDOI
The use of cork waste as a biosorbent for persistent organic pollutants-Study of adsorption/desorption of polycyclic aromatic hydrocarbons.
TL;DR: It is demonstrated for the first time that cork is a potential biosorbent for PAHs and may have relevance in the future treatment of PAH-contaminated waters.
Journal ArticleDOI
Cork: Current Technological Developments and Future Perspectives for this Natural, Renewable, and Sustainable Material
TL;DR: In this article, a review of the use of cork as a potential source of chemicals for alternative applications is presented, focusing on suberin, extractives fraction, and use of the cork in nontraditional applications.
References
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A chlorite holocellulose, its fractionation and bearing on summative wood analysis and studies on the hemicelluloses
L E Wise,M Murphy,A A D Adieco +2 more
Journal ArticleDOI
Biopolyester Membranes of Plants: Cutin and Suberin
TL;DR: The biosynthesis of the hydroxy, epoxy, and dicarboxylic acids of the polyesters from the common cellular fatty acids is elucidated and the function and possible practical implications of these polyester barriers are briefly discussed.
Journal ArticleDOI
Cork: properties, capabilities and applications
Susana Pereira Silva,Marcos A. Sabino,Emanuel M. Fernandes,Vitor M. Correlo,Luciano F. Boesel,Rui L. Reis +5 more
TL;DR: In this paper, a review of the chemical composition, physical and mechanical properties of cork and its products and sub-products is presented, with a focus on the properties of the wall structure and the low molecular weight, extractable components.
Journal ArticleDOI
Chemical composition and variability of cork from Quercus suber L.
TL;DR: The chemical composition of cork from Quercus suber L was determined for virgin cork and for reproduction cork as mentioned in this paper, which showed that sugar represents 50.6% of all monosaccharides, xylose 35.0%, arabinose 7.0% and mannose 3.4%.
Journal ArticleDOI
Cork biomass as biosorbent for Cu(II), Zn(II) and Ni(II)
TL;DR: In this article, the removal of heavy metal from solutions using biosorption in cork powder is described, along with the effect of different variables, such as the solid-liquid ratio, temperature and pH on the removal efficiency of the metals.