USE OF SOLID WASTE FROM THE MEAT INDUSTRY IN THE SYNTHESIS OF ADSORBENT MATERIALS FOR APPLICATION IN THE REMOVAL OF AMMONIACAL NITROGEN FROM CONTAMINATED WATERS

Abstract

The produced solid waste, mainly, do not have a reusable alternative, being thrown away in the environment, without generating environmental and economic benefits. In another context, there is the problematic removal of ammoniacal nitrogen (N-NH₄⁺) in wastewater, which has stability in water, making its removal difficult through conventional methods. This essay has as objective to evaluate the use of synthesized materials from the solid waste, as adsorbents in the removal of N-NH₄⁺. The adsorbent material, which is aimed in this study, was aluminosilicate, a kind of zeolite that presents cation removal characteristics. The waste used were iodine and the ashes from the boiler burning because they present aluminum and silicon available content. To the synthesis, it was used hydrothermal and drygel methods. The synthesized material we tested in synthetic effluent prepared with ammonium sulfate, at the concentration of 158,06 mgL^-1 N-NH₄⁺ and in the real effluent, at the concentration of 127,82 mgL^-1 N-NH₄⁺. In synthetic, obtained values of q_e in the syntheses I, II and III, were 5,39, 4,86 and 4,23 mgg^-1, and the removal percentage obtained were 42,65, 38,40, 33,44 (%). Now, in the real, the syntheses I, II and III had their q_e 1,46, 2,23 and 2,01 mgg^-1 and the removal percentage obtained were 14,29, 21,80 and 19,66 (%). Obtained results were satisfactory, indicating an applicability of the waste used as N-NH₄⁺ adsorbent material.