Eucalyptus wood treatment and leaching behavior of CCB (Chromated Copper Borate): a field test in Brazilian Midwest

Pedro Augusto Fonseca  Lima; Cassiano Pacheco da  Silva; Fernando Nunes  Gouveia; Gabriela Bertoni Belini; Elias Ricardo Durango  Padilla; Ana Larissa Santiago Hansted; Fabio Minoru  Yamaji; Carlos Roberto Sette Júnior

doi:10.33448/rsd-v10i11.19746

Autores/as

Pedro Augusto Fonseca Lima Federal University of Goiás https://orcid.org/0000-0001-5360-0104
Cassiano Pacheco da Silva Aqualit Tecnologia em Saneamento https://orcid.org/0000-0002-8594-7302
Fernando Nunes Gouveia Brazilian Forest Service https://orcid.org/0000-0003-2807-205X
Gabriela Bertoni Belini Federal University of São Carlos https://orcid.org/0000-0002-7231-694X
Elias Ricardo Durango Padilla Federal University of São Carlos https://orcid.org/0000-0001-5864-8828
Ana Larissa Santiago Hansted Federal University of São Carlos https://orcid.org/0000-0002-0305-8860
Fabio Minoru Yamaji Federal University of São Carlos https://orcid.org/0000-0002-0908-8163
Carlos Roberto Sette Júnior Federal University of Goiás https://orcid.org/0000-0002-1007-2345

DOI:

https://doi.org/10.33448/rsd-v10i11.19746

Palabras clave:

Propiedades de la madera; Deterioro de la madera; Preservación de la madera.

Resumen

El uso de Borato de Cobre Cromatado (CCB) para el tratamiento de la madera se conoce a través de varios estudios a escala de laboratorio. Sin embargo, faltan estudios de campo para analizar el efecto de CCB a lo largo del tiempo. Este estudio tuvo como objetivo evaluar las propiedades de la madera de Eucalyptus urophylla S.T. Blake x Eucalyptus grandis W. Mill ex Maiden (denominada E. urograndis), tratada con CCB, además de analizar la lixiviación de cromo, cobre y boro (Cr/Cu/B) en pruebas de campo. El experimento de campo, con madera tratada y sin tratar, se instaló en 2016 y se mantuvo hasta 2018. Se evaluaron las propiedades físico-mecánicas de la madera para cada condición (tratada y sin tratar) y en tres momentos diferentes: 0, 1 y 2 años exposición de campo. Las pérdidas de elementos (Cr/Cu/B) (lixiviación) fueron determinadas por la diferencia en la cuantificación de cada elemento retenido en la madera (retención), desde el año 0 (número de elementos originales) en adelante en relación a los años 1 y 2. El tratamiento conservante de la madera de E. urograndis con CCB fue eficaz para preservar sus propiedades físicas y mecánicas (pérdida de masa, densidad básica, ruptura y módulo elástico) durante los 2 años de exposición en campo. La madera de E. urograndis sin tratamiento CCB mostró una reducción de las propiedades físico-mecánicas, lo que indica una baja durabilidad natural. Se observó una alta lixiviación (cercana al 100%) de boro. Además, la retención total de CCB no cambió (estadísticamente) después de 2 años.

Citas

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Tratamiento de la madera de Eucalyptus y lixiviación de CCB (Borato de Cobre Cromado): ensayo de campo en el Medio Oeste brasileño

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