Evaluation of Effective Saturation of Air-NLAPL on the Basis of Air-Water Tests in Soils with Multimodal Pore-Size Distribution

• Autor(a) principal: Alfaro Soto, Miguel A. [UNESP]
• Data de Publicação: 2018
• Outros Autores: Kiang, Chang H. [UNESP], Dos Santos, Eduardo P. [UNESP]
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1061/9780784481684.002; http://hdl.handle.net/11449/171199

This paper was designed to verify if effective saturation distribution for air-LNAPL systems obtained indirectly as suggested by the American Petroleum Institute (2007) are adequate for soils of lateritic nature found in various territories of Brazil. The effective saturation of air-water systems were determined using hanging column tests for typical samples of the state of Satild;o Paulo (Brazil). These results were then compared to the effective saturations obtained in similar tests for air-LNAPL systems. In both cases, the capillary pressure curves were typical of soils with multimodal pore-size distribution. Moreover, indirect models for effective saturation curves of air-LNAPL were coherent, as long as a tri-modal model was used. Further studies for the prediction of the specific volumes of contaminants in tropical soils are recommended due to the differential retention characteristics.