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題名 | 銅、鎘在幾種臺灣土壤中聯結態與脫附性之探討=The Sequential Fractionation and Desorption of Copper and Cadmium in Several Taiwan Soils |
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作者 | 劉原宏; 李芳胤; 廖秋榮; Liu, Yuan-hung; Lee, Fang-yin; Liao, Chiu-jung; |
期刊 | 中國農業化學會誌 |
出版日期 | 19971200 |
卷期 | 35:6 1997.12[民86.12] |
頁次 | 頁683-691 |
分類號 | 434.223 |
語文 | chi |
關鍵詞 | 銅; 鎘; 脫附作用; 聯結態; Cu; Cd; Desorption; Sequential fractionation; |
中文摘要 | 本研究旨在探討銅與鎘在臺灣主要土類及有機質、 鐵錳氧化物含量較高之土壤中 之聯結態與脫附情形,以瞭解重金屬進入各類土壤後之宿命,藉以探討對植物與環境所造成 之衝擊。研究結果顯示銅在土壤中之聚積型態以鐵錳氧化物聯結態、碳酸鹽聯結態及有機物 聯結態為主,十種供試土之平均百分比分別為 29.4,23.8 及 17.0 %。而鎘主要以交換態 存在於土壤中,且其水溶態與交換態之平均比例和高達 68.6 %。此現象與脫附試驗中鎘之 脫附比例高達 89 %以上,而銅在大部分土壤中低於 7 %之結果相符。 因此,鎘污染對環 境所造成的衝擊應比銅大,亦即鎘在污染土壤中之植物有效性與移動性較高。此外,研究亦 發現,在強酸性的平鎮系與快官土壤中,銅與鎘的脫附比例都高於其他土壤,故而對鎘與強 酸性土壤的污染必需嚴予管制。 |
英文摘要 | This research studied the desorption mechanisms and chemical forms 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 soils. The results showed that Cu mainly associated with Fe-Mn oxides (29.4%), carbonates (23.8%) and orgainc matter (17.0%) while Cd existed mainly as water soluble and exchangeable forms (68.6%). In the desorption experiments, the desorption percentages of most of the soils were higher than 89% for Cd but lower than 7% for Cu. All the results indicated that Cd pollution might have a greater impact on plants and the environmetn than Cu pollution. In addition, we also found that strongly acidic soils (Pinchen and Kuaikuan soils) had higher desorption percentages than did other soils. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。