title: Cr(VI) Sorption/Desorption on Pine Sawdust and Oak Wood Ash.
abstract: 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)L-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.
authors.affiliation: Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, Lugo 27002, Spain. avelino.nunez@usc.es.
authors.forename: Avelino
authors.initials: A
authors.lastname: Núñez-Delgado
authors.affiliation: Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, Lugo 27002, Spain. mf.sanjurjo@usc.es.
authors.forename: María José
authors.initials: MJ
authors.lastname: Fernández-Sanjurjo
authors.affiliation: Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, Lugo 27002, Spain. esperanza.alvarez@usc.es.
authors.forename: Esperanza
authors.initials: E
authors.lastname: Álvarez-Rodríguez
authors.affiliation: Department of Plant Biology and Soil Science, Faculty of Sciences, Campus Ourense, University of Vigo, Ourense 32004, Spain. lcutillas@uvigo.es.
authors.forename: Laura
authors.initials: L
authors.lastname: Cutillas-Barreiro
authors.affiliation: Department of Plant Biology and Soil Science, Faculty of Sciences, Campus Ourense, University of Vigo, Ourense 32004, Spain. edjuanca@uvigo.es.
authors.forename: JuanCarlos
authors.initials: J
authors.lastname: Nóvoa-Muñoz
authors.affiliation: Department of Plant Biology and Soil Science, Faculty of Sciences, Campus Ourense, University of Vigo, Ourense 32004, Spain. mastevez@uvigo.es.
authors.forename: Manuel
authors.initials: M
authors.lastname: Arias-Estévez
mesh_terms: D000327:Adsorption; D002857:Chromium / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007700:Kinetics; D028223:Pinus; D029963:Quercus; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014934:Wood / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion
keywords: chromium; desorption; recycling; sorption; wood by-products