| A Potential Criterion to Evaluate Copper Adsorption in Wood Cell Wall |
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| 作者姓名： | JinzhenCao DonatienP.Kamdem |
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| 作者单位： | DepartmentofForestry,MichiganStateUniversity,126NaturalResourcesEastLansing,MI,U.S.A.48824-1222 |
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| 摘 要： | A gcometrical definition, fractal dimension, was introduced in this study to evaluate copper adsorption in wood treated with copper-containing preservatives. It is based on the assumption that some copper would compete the hydroxyl groups in wood cell wall with water molecules, and therefore influence the fractal dimension of internal wood surfaces revealed by the moisture adsorption in wood. Southern yellow pine (Pinus spp.) specimens were treated with different concentrations of copper ethanolamine (Cu-EA) solution to obtain different copper retention levels. Then the adsorption isotherms of untreated and Cu-EA treated specimens were determined at 4, 15, 30, and 40℃ to provide the source data for fractal dimension calculation. The results showed that, at all temperatures, the fractal dimension of the internal wood surfaces had a decreasing trend with increasing copper retention. That is, the internal spaces in wood become “thinner“ due to the copper adsorption on some hydroxyl groups in wood cell wall. The correlation between the fractal dimension and adsorbed copper ions makes it possible to evaluate the copper adsorption in wood cell wall.
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| 关 键 词： | 木材细胞壁 铜素 等温吸附 竞争吸附 评价指标 防腐剂 分形几何 |
A Potential Criterion to Evaluate Copper Adsorption in Wood Cell Wall |
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| JinzhenCao DonatienP.Kamdem.A Potential Criterion to Evaluate Copper Adsorption in Wood Cell Wall[J].Forestry Studies in China,2003,5(2):41-46. |
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| Authors: | Jinzhen Cao Donatien PKamdem |
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| Abstract: | A geometrical definition, fractal dimension, was introduced in this study to evaluate copper adsorption in wood treated with copper-containing preservatives. It is based on the assumption that some copper would compete the hydroxyl groups in wood cell wall with water molecules, and therefore influence the fractal dimension of internal wood surfaces revealed by the moisture adsorption in wood. Southern yellow pine (Pinus spp.) specimens were treated with different concentrations of copper ethanolamine (Cu-EA) solution to obtain different copper retention levels. Then the adsorption isotherms of untreated and Cu-EA treated specimens were determined at 4, 15, 30, and 40 ℃ to provide the source data for fractal dimension calculation. The results showed that, at all temperatures, the fractal dimension of the internal wood surfaces had a decreasing trend with increasing copper retention. That is, the internal spaces in wood become "thinner" due to the copper adsorption on some hydroxyl groups in wood cell wall. The correlation between the fractal dimension and adsorbed copper ions makes it possible to evaluate the copper adsorption in wood cell wall. |
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| Keywords: | wood preservative fractal dimension copper adsorption adsorption isotherms hydroxyl groups |
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