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单嘧磺隆在土壤中的吸附特性研究

, PP. 366-371

Keywords: 吸附,单嘧磺隆,Freundlich方程,吸附常数Kads-f

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Abstract:

采用平衡振荡法、液相色谱分析技术和5种模型分析了一种新型除草剂—单嘧磺隆在8种农田土壤中的吸附特性及其机理.Freundlich能够较好的描述单嘧磺隆在8种土壤中吸附特性能,其Kads-f在0.4173.523之间变化,吸附顺序为2#土壤>6#土壤>3#土壤>4#土壤>1#土壤>7#土壤>8#土壤>5#土壤.吸附等温线常数1/nads在0.7480.943之间变化,呈现出非曲线形式.同时结果表明,单嘧磺隆在供试土壤中具有较弱到中等的吸附能力,这和土壤的理化性质密切相关,其中土壤有机质含量是影响吸附最重要的因子.此外,单嘧磺隆在土壤中的吸附随pH值增加而减弱.

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