用振荡平衡法研究了喹乙醇在东北黑土、常熟水稻土,陕西潮土、南京黄棕壤和江西红壤中吸附行为及其影响因素.结果表明,喹乙醇在5种土壤中的吸附行为均可用Langmuir方程和Freundlich方程进行良好的线性拟合.其吸附系数KF很小,分别为2.813,1.740,0.446,0.309和0.201,显示很难被土壤吸附.其KF与土壤有机质含量及阳离子交换量呈良好的相关性.而与土壤pH值及黏粒含量相关性较差.温度和离子强度均对喹乙醇在土壤中的吸附有一定影响,较低的温度和离子强度均有利于土壤对喹乙醇的吸附.%The adsorption of olaquindox onto five soils including Northeast China black soil, Changshu paddy soil, Shanxi fluvo-aquic soil, Nanjing yellow brown soil, and Jiangxi red soil was investigated using batch equilibration technique and the factors governing the adsorption were investigated. The sorption of olaquindox could be well fitted by both the Langmuir and Freundlich isotherm for each type of the soils. Sorption distribution coefficients KF of five tested soils were 2.813, 1.740, 0.446, 0.309, and 0.201, respectively, suggesting that olaquindox is only slightly adsorbed on the soils. The values of KF wer well correlated to certain physical-chemical properties of the soils such as organic matter contents and cation exchange capacity. A poor relationship was found between KF and pH or clay contents of the soils. The sorption of olaquindox on the soils was also affected by temperature and ionic strength. Lower temperature and ionic strength favor to the sorption.
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