Chemical fixation of CCA-C preservative in wood of Pinus elliottii Part 2: Kinetics and modeling

摘要

ThispaperanalyzestheglobalchemicalkineticsofCCAfixationprocessinthewoodofPinuselliottii(Engelm.)andmodelstheevolutionoftheprocessofsettingfunctionoftimeatdifferentcombinationsoftemperatureandrelativehumidity.Forthispurpose,2cmcubspecimenswereimpregnatedbyavacuum#45;pressureprocesswithCCACsolution(2%bymass)andweretreatedinclimaticchamberaccordingtoninecombinationsoftemperatureandrelativehumidityforsevendays.ThefixingprocessevaluationwascarriedoutbymeansofthedeterminationbyUV#45;Visspectrophotometry,theconcentrationofCr(VI)leachingfromtreatedwoodsawdustwithdemineralizedwater.ThemainprocessspeedCCAfixationismainlycontrolledbythespeedofthechemicalreactionsinvolved.AnequationreliableratelawofthemainstageoftheprocessofCCAfixationonwood,whichinvolvesclimateconditionsandexposuretime./font