Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil

Liquid sewage sludge (LSS) addition to soil incorporates both insoluble suspended organic material and large amounts of dissolved organic matter (LSSDOM) which can influence the sorption-desorption behaviour of pestieides by soil constituents. Batch sorption isotherm techniques were used to determine the relative effect of the insoluble and dissolved organic matter from a LSS on the sorption and desorption of the herbicide atrazine by soil. Atrazine sorption and desorption isotherms were obtained on soil, LSS, LSS-amended soil, and LSSDOM-pretreated soil and described by the Frenndlich equation. The overall effect of LSS addition to soil (insoluble and dissolved organic matter) was to increase atrazine sorption, due to the high sorption capacity of the added insoluble organic matter. In contrast, LSSDOM, which was mainly constituted by low molecular weight molecules, decreased atrazine sorption by the soil. No evidences for stable interactions in solution between LSSDOM and atrazine were found, thus suggesting processes taking place at the soil/solution interface, such as competition for sorption sites on the soil surface, are the main responsible for the observed decrease in atrazine sorption by LSSDOM. Desorption of atrazine from soil was also enhanced by LSSDOM, but this effect was highly reduced when the soil had been pretreated with LSS (insoluble and soluble organic matter) or with LSSDOM alone. In these cases, interactions of LSSDOM with the soil surface have already taken place before the desorption experiment and the LSSDOM effects during desorption are less evident. The results of this work suggest that LSSDOM appfied to soils may enhance the risk of groundwater contamination by promoting atrazine desorption from soil, especially when the soil surfaces are free ofLSSDOM.

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Main Authors: Celis, R., Barriuso, E., Houot, S.
Other Authors: Ministerio de Educación y Ciencia (España)
Format: artículo biblioteca
Language:English
Published: Pergamon Press 1998
Online Access:http://hdl.handle.net/10261/60993
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spelling dig-irnas-es-10261-609932018-09-10T10:27:00Z Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil Celis, R. Barriuso, E. Houot, S. Ministerio de Educación y Ciencia (España) Liquid sewage sludge (LSS) addition to soil incorporates both insoluble suspended organic material and large amounts of dissolved organic matter (LSSDOM) which can influence the sorption-desorption behaviour of pestieides by soil constituents. Batch sorption isotherm techniques were used to determine the relative effect of the insoluble and dissolved organic matter from a LSS on the sorption and desorption of the herbicide atrazine by soil. Atrazine sorption and desorption isotherms were obtained on soil, LSS, LSS-amended soil, and LSSDOM-pretreated soil and described by the Frenndlich equation. The overall effect of LSS addition to soil (insoluble and dissolved organic matter) was to increase atrazine sorption, due to the high sorption capacity of the added insoluble organic matter. In contrast, LSSDOM, which was mainly constituted by low molecular weight molecules, decreased atrazine sorption by the soil. No evidences for stable interactions in solution between LSSDOM and atrazine were found, thus suggesting processes taking place at the soil/solution interface, such as competition for sorption sites on the soil surface, are the main responsible for the observed decrease in atrazine sorption by LSSDOM. Desorption of atrazine from soil was also enhanced by LSSDOM, but this effect was highly reduced when the soil had been pretreated with LSS (insoluble and soluble organic matter) or with LSSDOM alone. In these cases, interactions of LSSDOM with the soil surface have already taken place before the desorption experiment and the LSSDOM effects during desorption are less evident. The results of this work suggest that LSSDOM appfied to soils may enhance the risk of groundwater contamination by promoting atrazine desorption from soil, especially when the soil surfaces are free ofLSSDOM. This work has been partially supported by Association Franco-Israelienne pour la Recherche Scientifique et Tectmologique (AFIRST). R. Celis thanks the Spanish Ministry of Education and Science for his PFPI fellowship. Peer Reviewed 2012-11-23T11:58:49Z 2012-11-23T11:58:49Z 1998 2012-11-23T11:58:49Z artículo http://purl.org/coar/resource_type/c_6501 issn: 0045-6535 e-issn: 1879-1298 Chemosphere 37(6): 1091- 1107 (1998) http://hdl.handle.net/10261/60993 en open Pergamon Press
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language English
description Liquid sewage sludge (LSS) addition to soil incorporates both insoluble suspended organic material and large amounts of dissolved organic matter (LSSDOM) which can influence the sorption-desorption behaviour of pestieides by soil constituents. Batch sorption isotherm techniques were used to determine the relative effect of the insoluble and dissolved organic matter from a LSS on the sorption and desorption of the herbicide atrazine by soil. Atrazine sorption and desorption isotherms were obtained on soil, LSS, LSS-amended soil, and LSSDOM-pretreated soil and described by the Frenndlich equation. The overall effect of LSS addition to soil (insoluble and dissolved organic matter) was to increase atrazine sorption, due to the high sorption capacity of the added insoluble organic matter. In contrast, LSSDOM, which was mainly constituted by low molecular weight molecules, decreased atrazine sorption by the soil. No evidences for stable interactions in solution between LSSDOM and atrazine were found, thus suggesting processes taking place at the soil/solution interface, such as competition for sorption sites on the soil surface, are the main responsible for the observed decrease in atrazine sorption by LSSDOM. Desorption of atrazine from soil was also enhanced by LSSDOM, but this effect was highly reduced when the soil had been pretreated with LSS (insoluble and soluble organic matter) or with LSSDOM alone. In these cases, interactions of LSSDOM with the soil surface have already taken place before the desorption experiment and the LSSDOM effects during desorption are less evident. The results of this work suggest that LSSDOM appfied to soils may enhance the risk of groundwater contamination by promoting atrazine desorption from soil, especially when the soil surfaces are free ofLSSDOM.
author2 Ministerio de Educación y Ciencia (España)
author_facet Ministerio de Educación y Ciencia (España)
Celis, R.
Barriuso, E.
Houot, S.
format artículo
author Celis, R.
Barriuso, E.
Houot, S.
spellingShingle Celis, R.
Barriuso, E.
Houot, S.
Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil
author_sort Celis, R.
title Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil
title_short Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil
title_full Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil
title_fullStr Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil
title_full_unstemmed Effect of liquid sewage sludge addition on atrazine sorption and desorption by soil
title_sort effect of liquid sewage sludge addition on atrazine sorption and desorption by soil
publisher Pergamon Press
publishDate 1998
url http://hdl.handle.net/10261/60993
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AT barriusoe effectofliquidsewagesludgeadditiononatrazinesorptionanddesorptionbysoil
AT houots effectofliquidsewagesludgeadditiononatrazinesorptionanddesorptionbysoil
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