WOOD TREATED WITH ZN AND MN AND EFFECTIVENESS OF

C. Ibáñez, C. Mantero, L. Silva, M. Rabinovich, R. Escudero, J. Franco

Abstract


As part of the study of the application of a solution obtained from a domestic batteries recycling
process as a wood preservative, a eld stakes test was established to assess the acquired durability
in loblolly pine (Pinus taeda L.) specimens following the internationally accepted standard
EN 252. is 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 speci c fungicidal and insecticidal
properties against organisms that degrade wood, at concentrations lower than 3% Zn (the highest
concentration obtained from the recycling process). e specimens treated by the full cell method
with the mentioned solution were a erwards 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 di erent
concentrations of the studied solution as well as chromated copper arsenate (CCA) at two di erent
retention levels. At 32 months, 3 % and higher concentrations of Zn and borax applied by full cell
method showed to be the most e ective. Main degrading agents (insects, fungi and bacteria) found
in the specimens are also described.

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