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題名 | 臺灣森林土壤之硫酸根吸附與脫附行為(1)--土壤性質與硫酸根吸附量之關係及其吸附機制=Sulfate Adsorption and Desorption of Forest Soils in Taiwan(1):Relationship between Sulfate Adsorption and Soil Properties and Mechanism of Sulfate Adsorption |
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作者姓名(中文) | 黃仁足; 金恒鑣; 王明光; | 書刊名 | 中國農業化學會誌 |
卷期 | 36:3 1998.06[民87.06] |
頁次 | 頁239-255 |
分類號 | 436.193 |
關鍵詞 | 批次實驗; 硫酸根吸附; Elovich方程式; Freundlich方程式; Batch experiments; Sulfate adsorption; Elovich equation; Freundlich equation; |
語文 | 中文(Chinese) |
中文摘要 | 本研究選用了東寶津寒山、太平山、思源啞口、風口、小雪山、塔塔加、蓮華 池、石棹、祝山、阿里山等十處分佈在本省北、中、南各區 A 或 B 層之森林土壤,探討土 壤之原始硫酸根吸附量與其土壤理化性質的相關性。以批次試驗研究反應時間與 pH 值對硫 酸根吸附的影響,以及探討硫酸根吸附的可能機制。結果顯示,土壤之原始硫酸根吸附量, 僅與鹽基飽和度( BS )與以焦磷酸鈉抽取的 Fe 含量可達到 5% 的顯著相關。在批次試驗 中發現, 土壤之硫酸根吸附反應平衡時間, 因土壤本身吸附能力的大小而有所差異,而以 Elovich equation 描述塔塔加( Bw1 ),太平山( Bw2 )及蓮華池( A )供試土壤的動 力吸附行為皆可達 1% 的顯著水準。土壤之硫酸根吸附量,隨著平衡溶液 pH 值的降低而增 加,表面負電荷隨平衡溶液 pH 值增加而增加;正電荷則隨平衡溶液 pH 值的增加而輕微減 少。 在等溫批次試驗中, 土壤之硫酸根吸附量隨著硫酸根添加濃度的增加而增加, 以 Freundlich equation 描述三個供試土壤的等溫吸附行為亦可達 1% 的顯著水準。 |
英文摘要 | Ten soil sites were sampled for this study: Tong-Pau-Chin-Han Shan (mountain) , Tai-Ping Shan, Shih-Yan-Ya-Kao, Fong-Kou, Shaw-Sueh Shan, Ta-Ta-Chia, Lien-Hua-Chi, Shi-Chou, Chu Shan and A-Lei Shan of the A and B soil horizons. These soils are widely distributed over the island of Taiwan. These soil samples were collected and studied for their native sulfate adsorption and correlated to soil physical and chemical properties. The effects of pH and reaction time were studied in batch experiments and possible mechanisms for soil sulfate adsorption are proposed. Native soil sulfate adsorption only correlated with based saturation (BS) and pyrophosphate extractable organic-bound Fe (Fe �d ), and reached 5% in a significance test. In the batch experiments, the capacity of soil sulfate adsorption depended on the soil properties. The kinetic reactions of sulfate adsorbed by soils could be described by the Elovich equation and reached a 1% significance level. The amounts of soil sulfate adsorption increased with decreasing equilibrated solution pH. The negative charge of the soil surface increased with an increase in the soil solution pH. However, the positive charge of the soil surface decreased slightly with increasing soil solution pH. In the process of sulfate adsorption, the hydroxyls were released, and the soil surface negative charge increased. Sulfate adsorbed by the soils was plotted using the Freundlich equation and obtained a 1% significance level. |
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