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Effects of solid olive-mill waste addition to soil on sorption, degradation and leaching of the herbicide simazine

AuthorsAlbarrán, A.; Celis, R. ; Hermosín, M.C. ; López-Piñeiro, A.; Ortega Calvo, J. J. ; Cornejo, J.
Issue Date2003
PublisherBritish Society of Soil Science
CitationSoil Use and Management 19(2): 150- 156 (2003)
AbstractA laboratory study was conducted to investigate the effects of adding an intermediary byproduct of olive oil extraction (alpenyo or solid olive-mill waste, SOMW) on the sorption, degradation and leaching of the herbicide simazine in a sandy loam soil. The effect of SOMW addition on soil porosity was also assessed. The soil was amended in the laboratory with SOMW at two different rates (5% and 10% w/w). Simazine sorption isotherms showed a great increase in herbicide sorption after SOMW addition to soil; sorption increased with the amount of SOMW added. Incubation studies showed extended persistence by reduced biodegradation of simazine in the soil amended with SOMW compared with the unamended soil. Although the addition of SOMW to soil increased the total porosity, breakthrough curves of simazine in handpacked soil columns showed that SOMW addition retarded the vertical movement of the herbicide through the soil and reduced the total amount of herbicide leached. It appeared that the longer residence time of simazine in the amended soil columns (>20 days) compared with that in the unamended soil column (<20 days) allowed enhanced degradation and/or irreversible sorption under column leaching conditions. The results revealed important changes in herbicide behaviour upon SOMW addition, confirming the need to assess these changes in order to optimize the combined use of organic wastes and soil-applied pesticides.
Identifiersdoi: 10.1079/SUM2002185
issn: 0266-0032
e-issn: 1475-2743
Appears in Collections:(IRNAS) Artículos
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