土壤2011，Vol.43Issue(6)：993-997,5.
草萘胺在五种土壤及其胶体上的吸附行为
Adsorption of Napropamide on Five Soils and Soil Colloids
摘要
Abstract
Colloids, the fine particles in the soil act as "carrier" preventing adsorption of pesticide to immobile soil matrix. Owing to their high specific surface area, colloids have a high sorptive capacity and can be excellent sorbent of low solubility, strongly absorbing contaminants. Studies have indicated that colloids are capable of adsorbing and enhancing the transport of a variety of contaminants in soil and ground water. The purpose of this study was determined the extent of adsorption of napropamide on bulk soils and soil colloids. Equilibrium batch adsorption experiments were performed over concentration range of 1 to 12.5 mg/L napropamide on bulk soil samples and colloidal suspensions of 100 mg/L. Freundlich coefficient Kf ranged from 3.98 to 12.82 for bulk soil and from 946 to 2 679 for soil colloids. For the colloids the Kf values decreased in the order of black soil colloid > Huangnitu colloid > calcareous soil colloid > yellow brown soil colloid > red soil colloid. A significantly positive correlation existed between Kf and organic carbon content of soil colloids (p0.01), indicating that organic matter content of colloids was the crucial factor in affecting adsorption.关键词
草萘胺/土壤/胶体:吸附Key words
Napropamide/ Soil/ Colloid/ Adsorption分类
资源环境引用本文复制引用
何任红,马爱军..草萘胺在五种土壤及其胶体上的吸附行为[J].土壤,2011,43(6):993-997,5.基金项目
江苏省"333工程"项目(BRA2010161)和江苏省"六大人才高峰"项目(2010-NY-014)资助. （BRA2010161）
