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Open AccessArticle

Cr(VI) Sorption/Desorption on Pine Sawdust and Oak Wood Ash

Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, Lugo 27002, Spain
Department of Plant Biology and Soil Science, Faculty of Sciences, Campus Ourense, University of Vigo, Ourense 32004, Spain
Author to whom correspondence should be addressed.
Academic Editor: Oladele A. Ogunseitan
Int. J. Environ. Res. Public Health 2015, 12(8), 8849-8860;
Received: 4 June 2015 / Revised: 22 July 2015 / Accepted: 24 July 2015 / Published: 29 July 2015
(This article belongs to the Special Issue Hazardous Waste and Human Health-2015)
The objective of this work was to study Cr(VI) sorption/desorption on two by-products from the wood industry: pine sawdust and oak wood ash. The retention/release experiments were carried out using standard batch-type trials. In the sorption-phase experiments, pine sawdust showed 23% sorption when a concentration of 100 mg Cr(VI)ŸL−1 was added, whereas sorption on oak wood ash was 17%. In the desorption-phase, chromium release was clearly higher from pine sawdust than from oak wood ash (98% and 66%, respectively). Sorption curves were well fitted to the Freundlich and Lineal models. In view of the results, both materials can be considered of very limited value to remove Cr from polluted soil and water, which can be of relevance regarding its appropriate use as biosorbents and recycled by-products. View Full-Text
Keywords: chromium; desorption; recycling; sorption; wood by-products chromium; desorption; recycling; sorption; wood by-products
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Núñez-Delgado, A.; Fernández-Sanjurjo, M.J.; Álvarez-Rodríguez, E.; Cutillas-Barreiro, L.; Nóvoa-Muñoz, J.; Arias-Estévez, M. Cr(VI) Sorption/Desorption on Pine Sawdust and Oak Wood Ash. Int. J. Environ. Res. Public Health 2015, 12, 8849-8860.

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