| 除草剂草甘膦在土壤中的吸附行为 |
| 摘要点击 2744 全文点击 3156 投稿时间：2003-11-04 修订日期：2004-02-04 |
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| 中文关键词 除草剂 草甘膦 土壤 吸附 |
| 英文关键词 herbicide glyphosate soil adsorption |
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| 中文摘要 |
| 研究了除草剂草甘膦在3种土壤中的吸附行为, 观察了pH和离子强度等因素对吸附的影响. 结果表明:草甘膦在3种土壤中的吸附过程均符合一级动力学规律, 吸附等温线均为直线,吸附常数Kd 2.2207～3.5280mL/g; 随着离子强度的降低, 草甘膦在3种土壤中的吸附量明显增大; 随着pH(9～3)逐渐减小, 草甘膦在呼和浩特特市土壤和东胜土壤中的吸附量增大, 在杭锦2号土中的吸附量先增大, 在pH=7时达到最大值, pH=5时开始下降, 下降到4时的吸附量与pH=9时的相等. |
| 英文摘要 |
| The adsorption behaviors of herbicide glyphoste on three soils were studied. The influence of pH value and ion strength on adsorption was discussed. It was shown that the adsorption dynamic process of glyphoste on three soils all was first order reaction, and the adsorption isotherms all were linear, adsorption coefficients Kd ranged from 2 2207～3 5280mL·g-1 . The adsoption percentage of glyphoste on three soils increased with the ionic strength decrease . The adsoption percentage of glyphoste on the Huhhot soil and Dongsheng soil increased with pH value gradually decrease(9～3), and the adsoption percentageon of the Hangjing 2 soil early increased and late decreased with pH value gradually decrease(9～3). |
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