Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity

Biobed system is a simple method to minimize point source contamination during manipulation of pesticides and is based on the adsorption and degradation potential of a biomix composed by top soil, peat, and straw and covered with a grass layer. In our study, the biomix was prepared with Andisol, pea...

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Autores principales:	Fernández-Alberti,S, Rubilar,O, Tortella,G.R, Diez,M.C
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2012
Materias:	Biomix Andisol pre-incubation time water holding capacity chlorpyrifos
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000400012
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spelling	oai:scielo:S0718-951620120004000122013-04-02Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacityFernández-Alberti,SRubilar,OTortella,G.RDiez,M.C Biomix Andisol pre-incubation time water holding capacity chlorpyrifos Biobed system is a simple method to minimize point source contamination during manipulation of pesticides and is based on the adsorption and degradation potential of a biomix composed by top soil, peat, and straw and covered with a grass layer. In our study, the biomix was prepared with Andisol, peat and straw in a volumetric proportion of 1:1:2, and adsorption and degradation studies were done. Degradation of chlorpyrifos (160 mg a.i. kg-1) and formation of TCP (3, 5, 6-trichloro-2-pyrinidol) at different pre-incubation times (0, 15 and 30 days) and with different moisture contents (40, 60 and 80 % of water holding capacity) were evaluated, ligninolytic enzyme activity and microbial respiration in the biomix were periodically analyzed. Adsorption isotherms were fitted using Freundlich and linear models for Andisol and the biomix. The adsorption assays demonstrated that biomix has a higher capacity to retain chlorpyrifos than top soil. The pre-incubation period, WHC and the concentration of the chlorpyrifos of the biomix influenced the degradation of the contaminant and TCP formation as well as the biological activities in the biomix. The TCP was formed during the first steps of chlorpyrifos degradation and was later degraded in the biomix under all studied conditions. In conclusion, biomix with Andisol, peat and straw (1:1:2), pre-incubated by 15 days and incubated with 60% of WHC is capable to degrade chlorpyrifos efficiently.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.12 n.4 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000400012en10.4067/S0718-95162012005000032
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Biomix Andisol pre-incubation time water holding capacity chlorpyrifos
spellingShingle	Biomix Andisol pre-incubation time water holding capacity chlorpyrifos Fernández-Alberti,S Rubilar,O Tortella,G.R Diez,M.C Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity
description	Biobed system is a simple method to minimize point source contamination during manipulation of pesticides and is based on the adsorption and degradation potential of a biomix composed by top soil, peat, and straw and covered with a grass layer. In our study, the biomix was prepared with Andisol, peat and straw in a volumetric proportion of 1:1:2, and adsorption and degradation studies were done. Degradation of chlorpyrifos (160 mg a.i. kg-1) and formation of TCP (3, 5, 6-trichloro-2-pyrinidol) at different pre-incubation times (0, 15 and 30 days) and with different moisture contents (40, 60 and 80 % of water holding capacity) were evaluated, ligninolytic enzyme activity and microbial respiration in the biomix were periodically analyzed. Adsorption isotherms were fitted using Freundlich and linear models for Andisol and the biomix. The adsorption assays demonstrated that biomix has a higher capacity to retain chlorpyrifos than top soil. The pre-incubation period, WHC and the concentration of the chlorpyrifos of the biomix influenced the degradation of the contaminant and TCP formation as well as the biological activities in the biomix. The TCP was formed during the first steps of chlorpyrifos degradation and was later degraded in the biomix under all studied conditions. In conclusion, biomix with Andisol, peat and straw (1:1:2), pre-incubated by 15 days and incubated with 60% of WHC is capable to degrade chlorpyrifos efficiently.
author	Fernández-Alberti,S Rubilar,O Tortella,G.R Diez,M.C
author_facet	Fernández-Alberti,S Rubilar,O Tortella,G.R Diez,M.C
author_sort	Fernández-Alberti,S
title	Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity
title_short	Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity
title_full	Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity
title_fullStr	Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity
title_full_unstemmed	Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity
title_sort	chlorpyrifos degradation in a biomix: effect of pre-incubation and water holding capacity
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000400012
work_keys_str_mv	AT fernandezalbertis chlorpyrifosdegradationinabiomixeffectofpreincubationandwaterholdingcapacity AT rubilaro chlorpyrifosdegradationinabiomixeffectofpreincubationandwaterholdingcapacity AT tortellagr chlorpyrifosdegradationinabiomixeffectofpreincubationandwaterholdingcapacity AT diezmc chlorpyrifosdegradationinabiomixeffectofpreincubationandwaterholdingcapacity
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Chlorpyrifos degradation in a Biomix: Effect of pre-incubation and water holding capacity

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