Effect of components of leaching medium on the leaching of benzalkonium chloride from treated wood |
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Authors: | Teruhisa Miyauchi Mitsunori Mori |
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Institution: | (1) Hokkaido Forest Products Research Institute, 1-10 Nishikagura, Asahikawa, Hokkaido 071-0198, Japan |
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Abstract: | Different leaching media composed of watersoluble extracts from Sakhalin fi r, Japanese cedar, and Japanese larch heartwoods
and of taxifolin were used to characterize leaching of the C12 and C14 homologues of benzalkonium chloride from treated wood.
The leaching medium of Sakhalin fi r extract moderately accelerated the leaching rates of the two homologues. Japanese cedar
extract accelerated the leaching of the C12 homologue at a similar rate and that of the C14 homologue at a higher rate. Japanese
larch extract remarkably accelerated the leaching rates of both homologues, particularly that of the C14 homologue. Thus,
the leaching rate of the C14 homologue was higher than that of the C12 homologue with the Japanese cedar and larch extracts.
The media of taxifolin, a major phenolic extractive of Japanese larch, preferentially accelerated the leaching rate of the
C14 homologue. The amounts of phenolic compounds in the different leaching media were in the following order: Japanese larch
> Japanese cedar > Sakhalin fi r. These results indicate a relationship between the amount of phenolic compounds and the leaching
rates of the two homologues. |
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Keywords: | Benzalkonium chloride Homologue Leaching medium Taxifolin |
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