Efeito da temperatura no transporte dos íons potássio e nitrato no solo / Effect of temperature on the transport of the potassium and nitrate ions in a soil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

In the study of solute dynamics in porous media, it is of extreme importance the knowledge of the medium and transporting liquid properties as well as of external factors as temperature. In this sense, the objective of this work was the determination of parameters for potassium and nitrate ions under different temperatures in miscible displacement experiments, in a sandy loam Oxisol. The evaluated parameters were retardation factor (R) difusion/dispersion coefficient (D) and dispersivity (λ), whereas the used temperatures were the prevailing temperature (25°C to 28°C), 40°C and 50°C. The used salts were potassium nitrate and potassium chloride, prepared in a composed solution of 50 ppm of nitrate and 2000 ppm of potassium. From the results, it could be concluded that the temperature showed high influence on soil solution velocity and dispersion coefficient

ASSUNTO(S)

soil chemistry soluto nitrato química do solo transporte de íons potássio potassium temperature miscible displacement wastewater efluentes temperatura nitrate solutes

ACESSO AO ARTIGO

Documentos Relacionados