Effects of fixation temperature and environment on copper speciation in ACQ treated red pine
Effects of fixation temperature and environment on copper speciation in ACQ treated red pine
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DOI：
10.1515/hf.2008.035
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Cihat Taşçioğlu;P. Cooper;T. Ung
中科院分区：
文献类型：
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作者：
Cihat Taşçioğlu;P. Cooper;T. Ung
摘要红松（Pinus resinosa Ait.）用碱性（胺）铜季铵盐（ACQ）处理的边材样品在不同温度和湿或干条件下进行调节，以评价铜（Cu）对浸出的稳定性和二价铜（Cu-II）向单价铜（Cu-I）的转化。在后处理稳定化过程中，特别是在高温（105°C和120°C）下，大量的Cu-II被还原为Cu-I。在较低的保留率下，转化为Cu-I的百分比较高;在某些情况下，在较低的保留率和较高的固定温度下，所有含铜的Cu都被还原为Cu-I，这就增加了在高温条件下固定ACQ处理过的木材时，Cu作为生物杀灭剂的活性降低的可能性。然而，木材暴露于浸提程序（再润湿，再干燥）通常会导致木材中的Cu-I的重要成分被氧化回Cu-II。用氨溶烷基铜铵处理过的风化木材在120°C下进行蒸汽处理，也将大量的二价铜转化为一价铜。
Abstract Red pine (Pinus resinosa Ait.) sapwood samples treated with alkaline (amine) copper quaternary (ACQ) were conditioned at different temperatures and under wet or dry conditions to evaluate the stability of copper (Cu) to leaching and conversion of divalent copper (Cu-II) to monovalent copper (Cu-I). Significant Cu-II was reduced to Cu-I during post-treatment stabilization, especially at elevated temperatures (105°C and 120°C). The percent conversion to Cu-I was higher at lower retentions; in some cases, at low retentions and high fixation temperatures, all of the cupric Cu was reduced to Cu-I, raising the possibility of reduced activity of Cu as a biocide when high temperature conditions are used to fix ACQ treated wood. However, exposure of wood to a leaching procedure (rewetting, re-drying) generally resulted in a significant component of the Cu-I in wood being oxidized back to Cu-II. Steaming of weathered ACQ treated wood at 120°C also converted significant amounts of Cu-II to Cu-I.