| 除草剂苄嘧磺隆在土壤中的吸附 |
| 摘要点击 1621 全文点击 2166 投稿时间：2002-12-11 修订日期：2003-01-02 |
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| 中文关键词 苄嘧磺隆 吸附 土壤 |
| 英文关键词 bensulfuron methyl adsorption soil |
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| 中文摘要 |
| 应用平衡法研究了除草剂苄嘧磺隆在8种土壤中的吸附特性.结果表明,土壤对苄嘧磺隆有很强的吸附性,且随供试土壤理化性质的差异其吸附性呈明显变化.苄嘧磺隆在土壤中的吸附符合Fruendlich方程,其在土壤中的吸附常数Kf与土壤有机质、粘粒含量呈显著正相关(r=0.7393*和0.7751*,p＜0.05),与土壤pH呈显著负相关(r=0.7068*,p＜0.05).苄嘧磺隆在土壤上的吸附自由能为11.45～13.38kJ/mol,表明苄嘧磺隆在土壤中的吸附以物理作用为主. |
| 英文摘要 |
| Adsorption of bensulfuron methyl in eight different soils was studied using the batch equilibration technique. The results showed that soils had strong adsorption of bensulfuron methyl, which, however, varied with the different properties of the soil tested. The isotherm data were fitted to the Frenundlich equation. The Kf values increased with increasing organic matter and clay content of the soils and decreased with increasing pH. The correlative coefficient between Kf values and organic matter and clay content and pH were 0.7393*, 0 .7751*, 0.7068*, p<0.05, respectively. The free energy of sorption (ΔG) ranged from 11.45 to 13.38kJ/mol indicates the spontaneity of the given sorption process of bensulfuron methyl in soils. |
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