二氯喹啉酸及其代谢体在3种土壤中的吸附  

Absorption of Quinclorac and Metabolism in Three Different Types of Soil

作　　者：欧阳彬[1] 郭正元[1] 蔡智华[1] 

机构地区：[1]湖南农业大学农业环境保护研究所,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2006年第1期73-76,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：农业部农药检定所项目(NC20020415)

摘　　要：用批量平衡法研究了二氯喹啉酸及其代谢体在红壤、河潮土和紫泥土中的吸附行为,采用3种吸附方程对测定结果进行了拟合,并研究了3种土壤中有机碳吸附常数对吸附的影响.结果表明,二氯喹啉酸及其代谢体在3种土壤中的吸附适宜用Freundlich经验方程描述;3种土壤中二氯喹啉酸的吸附大小顺序依次为红壤、紫泥土、河潮土,代谢体的吸附大小顺序依次为紫泥土、河潮土、红壤;二氯喹啉酸在土壤中的吸附自由能变化为11.18kJ/mol,代谢体的吸附自由能变化为14.63kJ/mol,表明二氯喹啉酸及其代谢体在土壤中的吸附属于物理吸附.The absorptions of quinclorac and its metabolism in three different types of soil were investigated through batch equilibrium methods. In addition, the results were determined by three adsorptive equations. Moreover, the effects of different values of Koc on the adsorption were also investigated. The adsorptive mechanism of quinclorac and its metabolism were referred to. The results showed that the equation of Freundlich was suitable to describe the adsorption of quinclorac and its metabolism in three different types of soil. The absorption of quinclorac and its metabolism in the three soils showed following sequences： red loam 〉purple clay 〉tidal soil, or, purple clay〉 tidal soil 〉red loam. The mean AG of quinclorac and its metabolism in the three soils were 11.18 kJ/mol and 14.63 kJ/mol, respectively. The results showed that the adsorptive mechanism of quinclorac and its metabolism was physical adsorption.

关 键 词：二氯喹啉酸 代谢体 吸附 土壤 

分 类 号：X592[环境科学与工程—环境工程]