Repositorio
Institucional

Diez, M. Cristina

Tortella, Gonzalo R.

Briceno, Gabriela

Castillo, Maria del Pilar

Diaz, Jorge

Palma, Graciela

Altamirano, Carolina

Calderon, Carolina

Rubilar, Olga

Influence of novel lignocellulosic residues in a biobed biopurification system on the degradation of pesticides applied in repeatedly high doses

UNIV CATOLICA DE VALPARAISO

ELECTRONIC JOURNAL OF BIOTECHNOLOGY

en

Background: The biobed is a simple biopurification system used to prevent the point-source pesticide contamination that occurs at farm level. The typical composition of the biomixture used in this system is soil, peat and straw in volumetric proportions of 1:1:2. The principal component is straw due to its positive effects on biological activity and thus pesticide degradation. However, access to straw can be limited in some regions, so it must be replaced by other more readily available lignocellulosic residues. Results: Therefore, two alternate lignocellulosic materials (barley husks and pine sawdust) were evaluated as partial substitutes for straw. The degradation of a repeatedly applied mixture of six pesticides by these alternates was assessed. The microbial respiration and fluorescein diacetate (FDA) hydrolysis activity were also assessed. The results showed that the highest degradation efficiency was found in mixtures containing straw and barley husks. Each biomixtures tested achieved a high degradation (50 to 90%) of all the pesticides used except iprodione. Repeated applications of pesticides resulted in a slowing of the degradation rate of all pesticide types in all biomixtures. FDA activity and microbial respiration were higher in the biomixtures containing barley husks and straw compared to the mixture with pine sawdust, a result consistent with the pesticide degradations observed. Conclusions: This paper demonstrates that the straw in the traditional biomixture can be partially replaced by other lignocellulosic materials to efficiently degrade a mixture of pesticides, even when the pesticides are added in successive applications and high concentrations.

Artículo original

This work was supported by the FONDEF project with grant number D09R1006.

Este trabajo fue financiado por el proyecto FONDEF con el número de subvención D09R1006.

10.2225/vol16-issue6-fulltext-17

pdf

biopurification system

biomixture

lignocellulosic materials

pesticide degradation

CHLORPYRIFOS DEGRADATION

BIOMIXTURE

IPRODIONE

MATURITY

SORPTION

LIGNIN

COLUMN

sistema de biopurificación

biomezcla

materiales lignocelulósicos

degradación de plaguicidas

DEGRADACIÓN DE CLORPIRIFOS

BIOMIXTURA

IPRODIONA

MADUREZ

SORCIÓN

LIGNINA

COLUMNA

biopurification system

biomixture

lignocellulosic materials

pesticide degradation

CHLORPYRIFOS DEGRADATION

BIOMIXTURE

IPRODIONE

MATURITY

SORPTION

LIGNIN

COLUMN

sistema de biopurificación

biomezcla

materiales lignocelulósicos

degradación de plaguicidas

DEGRADACIÓN DE CLORPIRIFOS

BIOMIXTURA

IPRODIONA

MADUREZ

SORCIÓN

LIGNINA

COLUMNA

Biorremediación

Biotecnología Ambiental

Ciencias del suelo

Influence of novel lignocellulosic residues in a biobed biopurification system on the degradation of pesticides applied in repeatedly high doses

ELECTRONIC JOURNAL OF BIOTECHNOLOGY

dorada

verde

acceso abierto

acceso abierto

en

Artículo original

versión publicada

ANID CONICYT FONDEF D09R1006

ANID CONICYT FONDEF D09R1006

UNIV CATOLICA DE VALPARAISO

0717-3458

17

Biotecnología y Microbiología Aplicada

Biotechnology & Applied Microbiology

pdf

WOS:000328340400006