Estudo da adsorção/dessorção do ácido 2,4 diclorofenoxiacético (2,4d) em solo na ausência e presença de matéria orgânica

Química Nova

Eny Maria Vieira¹  Alexandre Gustavo Soares Do Prado¹  Maria Diva Landgraf²  Maria Olímpia De Oliveira Rezende² 

[1] ,Universidade de São PauloSão Carlos SP

关键词: humic substances;    2;    4D;    adsorption;    dessorptio;   

DOI  :  10.1590/S0100-40421999000300002

来源: SciELO

【 摘 要 】

The herbicides are being used in huge quantities for various porpouses. Once the herbicide finds its way into the environment, a major part of it comes in contact with soil. Humic substances are major organic constituents of soil. These substances may interact with herbicides in different modes and adsorption is probably the most important one. Adsorption will control the quantity of herbicide in the soil solution, and determines its persistence, leaching, mobility and bioavailability. In this work we studied the interaction between the herbicide 2,4D and soil in the presence and absence of organic matter. The methodology utilized for the determination of 2,4D was gas chromatography with eletron capture detector. The behavior of 2,4D was evaluated through Freundlich isotherms. It was verified that the herbicide 2,4D has a large adsorption in the humic acid .

【 授权许可】

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