Sorption of Nine Pesticides to Three Aquatic Macrophytes
Sorption of Nine Pesticides to Three Aquatic Macrophytes
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DOI：
10.1007/s002449900519
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发表时间：
1999-10
影响因子：
4
通讯作者：
S. J. H. Crum;A. Kammen-Polman;M. Leistra
中科院分区：
文献类型：
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作者：
S. J. H. Crum;A. Kammen-Polman;M. Leistra
研究了9种农药在水生植物球轮藻、伊乐藻和浮萍上的吸附。采用间歇平衡法研究了五种浓度水平下，植物新鲜枝条对重金属离子的吸附。除草剂莠去津和利谷隆的测定结果符合非线性Freundlich方程，Freundlich指数在0.53 ~ 0.60之间。其他化合物的结果显示几乎线性的吸附等温线，与Freundlich指数范围从0.9到1.1。毒死蜱的吸附量最高，吸附系数为1，660至2，150升/千克。吸附系数C.球蛋白含量比其他两种水生植物低。6种农药在土壤中的吸附系数（Kd）与其在水中的溶解度（S）之间存在相关性（R2= 0.80）。方程log Kd= 3.20 − 0.65 log S可用于初步估算农药对水生植物的吸附系数。
The sorption of nine pesticides to the aquatic macrophytesChara globularis, Elodea nuttallii,andLemna gibbawas studied. A batch equilibrium method was used to study the sorption at five concentration levels to fresh shoots of the macrophytes. The results for the herbicides atrazine and linuron were described by nonlinear Freundlich equations, with Freundlich exponents ranging from 0.53 to 0.60. The results for the other compounds showed almost linear sorption isotherms, with Freundlich exponents ranging from 0.9 to 1.1. The highest sorption was measured for chlorpyrifos, with sorption coefficients ranging from 1,660 to 2,150 L/kg. Sorption coefficients forC. globularistended to be lower than those for the other two macrophytes. Correlation (R2= 0.80) was found for the relation between the sorption coefficient (Kd) of six pesticides and their solubility in water (S). The equation log Kd= 3.20 − 0.65 log S can be used for a first estimate of the sorption coefficient of a pesticide to aquatic macrophytes.