AVALIAÇÃO DO TRANSPORTE DO HERBICIDA PARAQUAT EM SOLOS DO CAMPO EXPERIMENTAL DE BOM JARDIM, RJ / EVALUATION OF TRANSPORT OF HERBICIDE PARAQUAT IN SOILS OF EXPERIMENTAL FIELD OF BOM JARDIM, RJ

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This paper presents results of a study, performed in the laboratory, on the mobility of the herbicide Paraquat, investigated from its percolation through soils samples withdrawn from the Experimental Field of Bom Jardim, RJ. It was determined the physical, chemical and mineralogical properties of samples collected in such manner to form a profile of ground local soil. For these soils, through testings, such as the ADS test (in a special column) and the batchadsorption test, it was possible to determine parameters of the transport of the contaminant. In the analysis for the quantification of Paraquat was adopted a method of staining by spectrophotometric determination. In the ADS test it was possible, for only one of the soil samples, the determination of the parameters of transport with the batch- adsorption test it was determined, for all soils, the isotherm of adsorption as well as the parameters related to the models of Freudlich and Langmuir. From the results the ADS test it was found a high retention of Paraquat to the soil, leading to the conclusion that potential problems of contamination of superficial water at the sitemay be associated with erosive processes.

ASSUNTO(S)

ensaios de laboratorio transporte de contaminantes sorcao contaminant transport geotechnical laboratory tests paraquat paraquat sorption

ACESSO AO ARTIGO

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