%0 Journal Article
%T Deslocamento misc¨ªvel de um efluente de ind¨²stria de explosivo em colunas de solo
%A Garcia
%A William Vilar
%A Alcantara
%A Marco Aur¨¦lio Kondracki de
%A Camargo
%A Ot¨¢vio Antonio de
%A Iz¨¢rio Filho
%A H¨¦lcio Jos¨¦
%A Andreote
%A Fernando Dini
%J Bragantia
%D 2012
%I Instituto Agron?mico de Campinas
%R 10.1590/S0006-87052012000100015
%X this study evaluated some impacts due to the miscible displacement of an explosive industry effluent applied to a b horizon of an udox soil (la-b) under the following treatments: additions of carbonate (base), acid (acid), phosphate (fosf), carbonate and phosphate (base-fosf) and acid and phosphate (acid-fosf). nitrogen recovery compared with the total amount applied varies from 10.1% (acid) to 65.5% (base). there is correlation between experimental and fitted breakthrough curves for the most columns (p<0.001). the unique exception occurs to acid-fosf (p=0.202). there is no correlation between soil net electrostatic charge (nec) and the model adjusted variables: retardation factor (fr), dispersion-diffusion coefficient (d) and first-order decaying rate (¦Ì). phosphate adding (fosf) favors nitrogen movement, since reduces fr (2.35¡À0.05) and ¦Ì (0.498¡À0.050 h-1) and increases d (41.8¡À5.5 cm2 h-1), compared to la-b column (2.51¡À0.03; 1.697¡À0.084 h-1 and 2.85¡À1.26 cm2 h-1, respectively). adding carbonate and/or phosphate (base, base/fosf e fosf) results in the highest values for maximum chemical oxygen demand (codmax). the small dna amount extracted from soil bacterial cells suggests that the n adsorption and movement have non biological nature, or that the high leachate liquid cod is prejudicial to soil microorganisms.
%K miscible displacement
%K nitrogen
%K breaktrough curves
%K pcr-dgge.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0006-87052012000100015&lng=en&nrm=iso&tlng=en