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Resumo(s)
Pine (Pinus pinaster) wood was heat treated in an autoclave for 2-12 hours at 190-210 ºC.
Hemicelluloses were the first compounds affected by the treatment. In general, the sugar decrease
was higher for arabinose and galactose followed by xylose and mannose. Lignin started to degrade
for small mass losses but at a slower rate than hemicelluloses, and cellulose only degraded
significantly for severe treatments. Almost all of the original extractives disappeared and new
compounds arose like anhydrosugars and phenolic compounds. The compounds that might leach
from heat treated wood were mainly those identified in the water and ethanol extracts, all of which
were not harmful at the existing concentrations, thereby reinforcing the wood heat treatment as an
environmental benign process.
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Contexto Educativo
Citação
Esteves, B., Videira, R., & Pereira, H. (2011). Chemistry and ecotoxicity of heat-treated pine wood extractives. Wood Science and Technology, 45(4), 661–676. doi:10.1007/s00226-010-0356-0.
Editora
Springer