%0 Journal Article
%T Deslocamento misc¨ªvel de c¨¢tions provenientes da vinha a em colunas de solo Miscible displacement of cations from vinasse in soil columns
%A Antonio T. de Matos
%A Helder A. de A. Gariglio
%A Paola A. V. Lo Monaco
%J Revista Brasileira de Engenharia Agr¨ªcola e Ambiental
%D 2013
%I Departamento de Engenharia Agr¨ªcola - UFCG
%X Com o objetivo de avaliar o fator de retardamento, o coeficiente de dispers o-difus o e as curvas de efluente dos ¨ªons c¨¢lcio, magn¨¦sio e pot¨¢ssio presentes na vinha a, realizou-se um experimento em laborat¨®rio com colunas dos solos Latossolo Vermelho Distr¨®fico (LVd), Latossolo Vermelho Eutrof¨¦rrico (LVef) e Latossolo Vermelho-Amarelo Distr¨®fico (LVAd). As colunas foram interligadas a frascos de Mariotte contendo ¨¢gua destilada e, em seguida, a frascos contendo ¨¢gua residu¨¢ria. As concentra  es relativas ¨¤s amostras do efluente, correspondentes aos respectivos volumes de poros, foram utilizadas a fim de se obter as curvas experimentais de efluente para o pot¨¢ssio, c¨¢lcio e magn¨¦sio. Utilizou-se o programa Disp 1.1 para, a partir dos dados das curvas de efluente, obter os valores dos fatores de retardamento (fR) e os coeficientes de dispers o-difus o (D) para os ¨ªons. Os maiores valores de fR foram obtidos para o pot¨¢ssio no LVd, seguido do c¨¢lcio no LVAd e por ¨²ltimo o pot¨¢ssio no LVAd. Os menores valores de fR e de D para todos os ¨ªons avaliados foram obtidos no LVef. O magn¨¦sio apresentou os menores valores de fR e D, nos tr¨ºs solos avaliados. In order to evaluate the retardation factor, dispersion coefficient and diffusion-effluent curves of calcium, magnesium and potassium present in the vinasse, a laboratory experiment was conducted in soil columns of typical Distrophic Red Latosol (LVd), typical Eutroferric Red Latosol (LVef) and typical Distrophic Yellow Red Latosol (LVAd). The columns were connected to the Mariotte bottle containing distilled water and then the vials containing wastewater. The relative concentrations of the samples of the effluent corresponding to the respective pore volumes were used to obtain the experimental curves of the effluent for potassium, calcium and magnesium. To obtain the retardation factors (fR) and dispersion-diffusion coefficients (D) for the ions, the data of the effluent curves and the Disp 1.1 program were used. The highest values of fR were obtained for potassium in LVd, followed by calcium in the LVAd and lastly, the potassium in the LVAd. The lowest fR and D values for all studied ions were obtained in LVef. Magnesium showed the lowest values of fR and D in the three evaluated soils.
%K ¨¢gua residu¨¢ria
%K fator de retardamento
%K coeficientes de dispers o-difus o
%K wastewater
%K retardation factor
%K dispersion-diffusion coefficients
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000700008