Effects of the organic matter from swine wastewater on the adsorption and desorption of alachlor in soil |
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| Authors: | Tatiane C Dal Bosco Silvio C Sampaio Silvia R M Coelho Natássia J Cosmann Adriana Smanhotto |
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| Institution: | 1. Universidade Estadual do Oeste do Paraná (UNIOESTE), Cascavel, Paraná, Brazil. Programa de Pós Gradua??o em Engenharia Agrícola (PGEAGRI). Universidade Tecnológica Federal do Paraná (UTFPR) , Londrina , Paraná , Brazil;2. Programa de Pós Gradua??o em Engenharia Agrícola (PGEAGRI), Universidade Estadual do Oeste do Paraná (UNIOESTE) , Cascavel , Paraná , Brazil;3. Programa de Pós Gradua??o em Engenharia Agrícola (PGEAGRI), Universidade Estadual do Oeste do Paraná (UNIOESTE) , Cascavel , Paraná , Brazil |
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| Abstract: | The application of swine wastewater to the soil for agricultural purposes results in the addition of total and dissolved organic matter to the soil, which may interfere with the dynamics of pesticides in the soil. The objective of this study was to evaluate the effects of the application of total and dissolved organic matter from a biodigester and a treatment lagoon of swine wastewater in the adsorption and desorption of alachlor 2-chloro-2,6-diethyl-N(methoxymethyl acetamide)]. The assay was performed by the batch equilibrium method, and the results were fitted to the Freundlich model. The curve comparison test revealed a greater adsorption of alachlor in the soil treated with swine wastewater from the biodigester. The adsorption and desorption of alachlor increased in the soils where swine wastewater was added, and hysteresis was observed in all of the treatments. |
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| Keywords: | Freundlich isotherms biodigester treatment lagoon dissolved organic matter total organic matter |
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