Biotecnología

 

Adsorción de atrazina en secciones circulares de raíces de tres plantas de humedales

 

Adsorption of atrazine in circular sections of roots of three wetland plants

 

E. Cejudo–Espinosa¹*, A. Velázquez–Zepeda y R. Rodríguez–Vázquez²

 

¹ Departamento de Ecología Funcional. Instituto de Ecología A.C. Km 2.5 Carretera Antigua a Coatepec No.351, El Haya. Xalapa, Ver. 91070. * Autor para la correspondencia. E–mail: ecejudoe@gmail.com Tel. (+228) 84251800 Ext 4218. Fax (+228) 8421800 Ext 4222

² Departamento de Biotecnología y Bioingeniería. CINVESTAV. Av. IPN No 2508. Col. San Pedro Zacatenco. México D.F. 07360

 

Recibido 3 de Septiembre 2008
Aceptado 13 de Enero 2009

 

Resumen

El presente trabajo reporta las isotermas de adsorción del herbicida Atrazina, evaluadas en secciones circulares de raíces muertas de tres plantas de humedales, Typha domingensis Sagittaria lancifolia y Echinochloa pyramidalis. La capacidad adsortiva (mg Atrazina /g de biomasa) obtenida de cada especie fue: S. lancifolia (q_m= 2.035), seguida de T. domingensis (q_m= 1.797), y E. pyramidalis (q_m= 1.107). La mayor capacidad adsortiva de S. lancifolia se relaciona con el alto contenido lipídico, componente celular que puede interactuar con el herbicida. Estos resultados aportan información sobre la adsorción como una técnica promisoria para la remoción de plaguicidas en zonas inundables.

Palabras clave: adsorción, isotermas, raíces, Atrazina.

 

Abstract

This work reports the adsorption isotherms for the herbicide Atrazine, evaluated in circular sections of dead roots of three wetland plants, Typha domingensis Sagittaria lancifolia y Echinochloa pyramidalis. The adsorptive capacity (mg Atrazina /g of biomass) of each species was S. lancifolia (q_m= 2.035), followed by T. domingensis (q_m= 1.797), and E. pyramidalis (q_m= 1.107). The highest adsorptive capacity of S. lancifolia is related to the elevated lipid content, which could interact with the herbicide. These results provide information about adsorption as a promissory technique to pesticides remediation in flooded areas.

Keywords: adsorption, isotherms, roots, Atrazine.

 

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Agradecimientos

A la QFB Elvira Ríos–Leal i al Ing. Cirino Rojas (Departamento de Biotecnología, CINVESTAV Zacatenco). A la QFB Paula Gamboa por las correcciones al manuscrito. Trabajo realizado con beca CONACyT (191663).

 

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