Effects of fixation temperature and environment on copper speciation in ACQ treated red pine
Yükleniyor...
Dosyalar
Tarih
2008
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Walter De Gruyter Gmbh
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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 (Cud). Significant Cu-II was reduced to Cud during post-treatment stabilization, especially at elevated temperatures (105 degrees C and 120 degrees 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 Cud, 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.
Açıklama
WOS: 000255555600006
Anahtar Kelimeler
alkaline (amine) copper quaternary (ACQ), 2,2 '-biquinoline, copper speciation, Cu-I, fixation, ion coupled plasma spectroscopy, UV-visible
Kaynak
Holzforschung
WoS Q Değeri
Q1
Scopus Q Değeri
Q3
Cilt
62
Sayı
3
