灭多威在黄河水体沉积物中的吸附特性研究

Characteristic of Adsorption of Methomyl on Yellow River's Sediments

以黄河水体沉积物为研究对象 ,探讨了氨基甲酸酯类农药灭多威在沉积物上的吸附特性 ,同时还研究了 pH值和离子强度等因素对吸附的影响 .结果表明 ,灭多威在沉积物中的吸附等温线呈中凹型 ,属多分子层吸附 ,可用deBoer_Zwikker公式所表示的极化模型较好地描述其吸附行为 ;pH值或离子强度升高 。

The characteristic of adsorption of methomyl on Yellow River's sediments and the influence of some factors, such as pH value and ionic strength on the adsorption investigated. The results show that appropriate type of methomyl on sediments is multi_molecular layer adsorption, which can be well described by de Boer_Zwikker Equation for polarization model. The adsorbance of methomyl on sediments falls with the increase in pH value or ionic strength of the solution.