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題 名 | 幾種臺灣土壤對銅與鎘吸附性之探討=Adsorption of Copper and Cadmium by Several Taiwan Soils |
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作 者 | 劉原宏; 李芳胤; 廖秋榮; | 書刊名 | 中國農業化學會誌 |
卷 期 | 35:6 1997.12[民86.12] |
頁 次 | 頁671-682 |
分類號 | 434.223 |
關鍵詞 | 銅; 鎘; 吸附作用; Cu; Cd; Adsorption; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究指在探討幾種臺灣主要土類及有機質、 鐵錳氧化物含量較高之土壤對重金 屬銅、鎘的吸附性,以瞭解重金屬進入各類土壤後所產生之衡擊,研究結果顯示不同土壤對 銅、鎘之吸附量亦有相當差異,其中鹽基物質含量甚高的壽豐系土壤在對銅的吸附過程中因 產生沈澱作用,故而造成超高之吸持量, 其餘土類則以 pH 值高( 8.8 )、細質地(黏粒 45.8 %)及鹽基飽和度高( 81.1 %)的太康系與有機質含量高( 52.7 g/kg )、陽離子 交換容量大( 34.9 cmol(+)/kg )及鹽基飽和度高( 59.4 %)的水漣系之吸附量較高, 而以 pH 值較低之快官土( ph 2.4 )與平鎮系( pH 4.1 )之吸附量較低。就不同重金屬 種類而言,各土類對銅之吸附量皆高於鎘;研究亦發現 Langmuir isotherm equation 適用 於各類土壤對銅、鎘之吸附、同時,由此方程式計算而得之最大吸附量與實驗求得之結果相 當。 |
英文摘要 | This project studied the adsorption mechanisms of Cu and Cd in major Taiwan agricultural soils and soils with high organic matter and Fe-Mn oxide contents in order to evaluate the fate and impact of the metals in the studied soills. The results showed that each soil has a different adsorption capacity for Cu and Cd. Of all the soils, the obvious precipitation in the adsorption process of Cu caused Sou-Feng soils with high base saturation to adsorb dramatically. Among the remaining soils, the Tai-Kang soils (pH 8.8, clay 45.8%, base saturation 81.1%) and Shui-Lien soils (organic matter content 51.7 g/kg, cation exchange capacity 34.9 cmol(+)/kg, base saturation 59.4%) had higher adsorption capacity while the Kwai-Kuan and Ping-Chen soils with lower pH values (2.4 and 4.1, respectively) had lower adsorption capacity than did the other soil series. In terms of different heavy metals, all the soils adsorbed more Cu than Cd. We also found that the Langmuir isotherm equation could be applied to the studied soils as an adsorption model. The maximum amounts of adsorption calculated using the Langmuir equation were equivalent to those obtained from the experiments. |
本系統中英文摘要資訊取自各篇刊載內容。