颗粒物对乐果的吸附特征

研究了颗粒物（内蒙古土壤Y2、Y3、Y4和黄河水体表层沉积物Y1）对有机磷农药乐果的吸附规律,观察了颗粒物的性质如有机质、粘粒、CEC（阳离子交换量）和离子强度等因素对吸附行为的影响。结果表明,内蒙古4种颗粒物对乐果的吸附过程可用Freundlich等温式描述,吸附常数在1.4848～1.9550mL·g-1之间;影响颗粒物对乐果吸附的主要因素是CEC、离子强度和有机质,颗粒物对乐果的吸附量与颗粒物的CEC有着极显著的正相关关系,相关系数为0.9812,P〈0.01;随着离子强度的降低,4种颗粒物对乐果的吸附量增大;除黄河水体表层沉积物Y1外,颗粒物的有机质含量越高,对乐果的吸附能力就越强。

Adsorption Characteristics of Rogor on the Particulates

Adsorption of Rogor on the particulates（The soil of Inner Mongolia Y2,Y3,Y4 and the Surface sediment of Yellow River Y1） was studied and the influence factors of the particulates,such as organic matters,granule of viscosity,CEC（cationic exchange capacity） and ionic strength on adsorption,were observed.The results showed that adsorption process of Rogor on the above dicussed four particulates of Inner Mongolia could be described with Freundlich isotherm,of which the adsorption coefficient ranged between 1.484 8～1.955 0 mL·g-1;the adsorption of Rogor on the particulates was effected by the CEC,ionic strength and organic matter,of particulates,and there was remarkable positive correlation between Q and CEC of the particulates（Y1～Y4）（R2=0.981 2,P0.01）;Additionally,with decrease in ionic strength,the adsorption percentage gradually increased;Besides the Surface sediment of Yellow River Y1,the adsorptive capacity was strengthen with increasing content of organic matters of the particulates.Although the content of organic matters Y1 was only 1.21%,but the smaller than 63 μm of the particulate size was more then 80% of this section of surface sediment.Compared to Y2 and Y3,the particle size of Y1 was smaller,with the bigger surface area,adsorbtion position and actived characteristic year to year occupied in the water body,therefore,which had a higher adsorption capacity.