Movimento de cátions básicos presentes em água residuária de manipueira em colunas de solo.

Abstract

This study evaluates the movement of ions of calcium, sodium, potassium and magnesium from cassava wastewater in columns of a Eutrophic Red-Yellow Argissol. It was used in the experiment two glass columns of 6 cm in diameter and 26 cm of height, filled with 20 cm of soil having aggregates up to 2 mm, properly homogenized and slightly compressed. With a water depth around 2/3 of the glass column, the column was left within the containers for 24 hours to achieve saturation. After that time, the columns were fixed vertically in proper structure. The columns were linked to the Mariotte bottle containing distilled water for a period sufficient for passage of two times the total volume of pores. After complete infiltration of distilled water, bottles of Mariotte containing cassava wastewater were connected to the columns for a sufficient time for the percolating volume corresponding to three volumes of pores. The effluent was continuously collected achieving a total of 20 samples in each column, with pore volume of 0.15 each, totaling 80 samples. After collecting the effluent, analyses were performed to quantify the contents of calcium, sodium, potassium and magnesium. The calcium ion was the one with highest dispersive-diffusive coefficient, which may be indicative of retention capability of Eutrophic Red-Yellow Argissol.