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木粉 칼럼을 이용한 ACZA 木材防腐防蟲劑의 定着性 硏究
김영숙,Morrell, J. J. 國民大學校 山林科學硏究所 1997 山林科學 Vol.9 No.-
A simple method was attempted to determine the fixation of Ammoniacal Copper Zinc Arsenate(ACZA) using the glass column with wood particle. ACZA solution was percolated through the column packed with wood particle of Douglas fir and then the filtrates were also analyzed by X-Ray Fluorescence Analyzer. As a results, the experimental data indicated that the rate of copper adsorption to wood particle was higher than zinc and arsenic below 1.5% ACZA. While the rate of zinc adsorption increased at the higher concentration showing the decrease of Copper adsorption. Arsenic adsorption wasn't detected at any column.
Developing Diffusion Coefficients for SCF Impregnation of Douglas Fir Heartwood with Cyproconazole
Kang, S. M.,Ra, J. -B.,Levien, K. L.,Morrell, J. J. Taylor & Francis Inc. 2006 Journal of wood chemistry and technology Vol.26 No.2
<P> The effects of the treating period and specimen length on supercritical fluid impregnation of cyproconazole were investigated for Douglas fir heartwood using cooling to induce biocide deposition. Retention levels at various treatment periods and locations were measured. These retention values were assumed to be equivalent to the concentration of biocide at the end of the treatment period. The concentration values versus distance from the surface were then fitted to an empirical expression as a function of time and distance. From the resultant concentration formulae, time-varying effective diffusion coefficients for the biocide at the depth locations of the data were determined using Egner's solution method for the Fickian diffusion equation in one direction. The diffusion coefficient values suggested that diffusion was probably the rate-limiting phenomena accounting for biocide penetration. Prolonged treatment appeared to increase the effective diffusion coefficients, probably by removing extractives in heartwood pits.</P>