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Maderas. Ciencia y tecnología
versión On-line ISSN 0718-221X
IBANEZ, C et al. Wood treated with Zn and Mn and effectiveness of treatment with borax to prevent leaching. Maderas, Cienc. tecnol. [online]. 2012, vol.14, n.2, pp.165-174. ISSN 0718-221X. http://dx.doi.org/10.4067/S0718-221X2012000200004.
As part of the study of the application of a solution obtained from a domestic batteries recycling process as a wood preservative, a field stakes test was established to assess the acquired durability in loblolly pine (Pinus taeda L.) specimens following the internationally accepted standard EN 252. This solution is acidic, containing 32 g l-1 Zn and 15 g l-1 of Mn as sulfates and free of heavy metals; in laboratory tests the solution proved to have specific fungicidal and insecticidal properties against organisms that degrade wood, at concentrations lower than 3% Zn (the highest concentration obtained from the recycling process). The specimens treated by the full cell method with the mentioned solution were afterwards treated with 2% in borax by the full cell method and by brushing in order to prevent leaching. Natural and acquired durability are compared using different concentrations of the studied solution as well as chromated copper arsenate (CCA) at two different retention levels. At 32 months, 3 % and higher concentrations of Zn and borax applied by full cell method showed to be the most effective. Main degrading agents (insects, fungi and bacteria) found in the specimens are also described.
Palabras clave : Zinc; borax; wood preservers; manganese; stakes graveyard.