Adsorption and Desorption Behavior of Metalaxyl in Intensively Cultivated Acid Soils

被引：26

作者：

Bermudez-Couso, Alipio ^{[1
]}

Fernandez-Calvino, David ^{[1
]}

Pateiro-Moure, Miriam ^{[1
]}

Garrido-Rodriguez, Beatriz ^{[1
]}

Carlos Novoa-Munoz, Juan ^{[1
]}

Arias Estevez, Manuel ^{[1
]}

机构：

[1] Univ Vigo, Dept Biol Vexetal & Ciencia Solo, Fac Ciencias, Area Edafoloxia & Quim Agr, Orense 32004, Spain

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2011年 / 59卷 / 13期

关键词：

metalaxyl; adsorption/desorption; kinetics; soil; VINEYARD SOILS; CATIONIC SURFACTANT; FUNGICIDES; SORPTION; PESTICIDES; RETENTION; KINETICS; COPPER; DISSIPATION; PENCONAZOLE;

D O I：

10.1021/jf201028q

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Metalaxyl adsorption and desorption behavior in acid soils were evaluated via batch and stirred-flow chamber experiments. On the basis of batch experiments (adsorption curves of the Giles C-type), metalaxyl has a low affinity for acid soils. Also, as derived from batch and stirred-flow chamber tests, its adsorption in acid soils is dictated mainly by their organic matter and clay contents. The high correlation between these two variables makes it rather complicated to resolve their effects. Metalaxyl adsorption occurs largely (80-99%) via fast adsorption reactions. On the other hand, the pesticide is desorbed in variable proportions (30-100%). The desorption parameters obtained by fitting the results to a pseudo-first-order reaction were correlated with no edaphic variable; however, the q(0)/q(max) ratio, which is a measure of reversibility in the adsorption desorption process, exhibited significant negative correlation with the organic matter and clay contents.

引用

页码：7286 / 7293

页数：8

共 36 条

[1] KINETICS OF SOIL CHEMICAL-REACTIONS - RELATIONSHIPS BETWEEN EMPIRICAL EQUATIONS AND DIFFUSION-MODELS [J].