RESÍDUOS DA LAVRA E DO BENEFICIAMENTO DE ROCHAS ORNAMENTAIS COMO POTENCIAL REMINERALIZADOR DO SOLO

• Ano de defesa: 2022
• Autor(a) principal: Santos, Elton Souza dos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Agroquímica; Centro de Ciências Exatas, Naturais e da Saúde; UFES; Programa de Pós-Graduação em Agroquímica
• Palavras-chave em Português: Agrominerais; Estoque Remanescente; Fertilização; Multifio; subject.br-rjbn; Agronomia
• Link de acesso: http://repositorio.ufes.br/handle/10/16266

In agriculture, the use of residues from mining and processing of dimension stones as an alternative source of nutrients has been growing, due to the advantages in the economic, environmental, and productive sectors. This work aimed to evaluate the suitability of using mining residues and processing dimension stones as a potential remineralizer of soils. Seven samples of coarse waste generated in quarries were selected, called remaining stocks (identified by the acronyms ARD, CBE, CIE, MGE, OIE, PSBE and PSGE) and for three of them, waste generated by sawing on a multiwire loom, called multi-wire waste (identified by the abbreviations OIM, PSBM and PSGM). Waste pH and particle size, chemical composition via x-ray fluorescence, mineralogical composition from petrographic analysis and x-ray diffraction, quantification of free SiO2 via Rietveld method and pH, electrical conductivity and metal contents in the solubilized extract prescribed by Annex G of NBR 10004:2004. The results obtained were compared with the Normative Instruction nº 5 of 2016 (IN) of the Ministry of Agriculture, Livestock and Supply. Finally, the effect of the use of residues on the physical and chemical characteristics of the soil submitted to the incubation process in accordance with the IN was evaluated. Except for the ARD residue, all residues from the remaining stock, after comminution, are classified as powder, as they have a 100% granulometry that passes through a 2.00 mm sieve. Multi-wire waste, together with ARD, is classified as filler, as it is 100% passing through a 0.03 mm sieve. All have alkaline pH, K2O content greater than 1% and base sum greater than 9%, except for the OIM residue, whose value was 5.36%. All had free SiO2 content lower than the threshold value of IN, which is 30%, and had levels of micronutrients Si and Fe above the limits to be declared on the label, in case they were registered. None of the residues have concentrations of As, Cd, Hg and Pb that make them potentially toxic. All are classified as class II, according to NBR 10004:2004. However, ARD, PSBM and PSGM residues were classified as class II - inert, while the others were classified as class II - non-inert, due to the parameters Al, Ba and Fe, which were with values ​​above the maximum limit allowed by the standard. The ARD, PSBM and PSGM residues showed a moderate degree of restriction regarding RAS, while the others showed a severe degree of restriction. However, all showed no restrictions on use for salinity. Thus, all waste analysed in this study meets the minimum and maximum requirements set out in IN No. 05 of MAPA (BRASIL, 2016) regarding physical and chemical nature. Furthermore, the results obtained during the incubation stage, inherent to the Agronomic Protocol, showed their potential for use as soil remineralizers.