Alterações aos atributos químicos e mobilidade de íons em colunas de solo tratados com lodo de esgoto doméstico

• Autor(a) principal: Ferreira, Leonardo Batista Sanguinetti
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5445
• topic: Lixiviação de ions; Metais pesados; Lodo de esgoto; Leaching of ions; Heavy metals; Sewage sludge; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO

Waste management, especially the sewage sludge, is extremely important in association to enviromental. However the study of the dynamics of ions in the sewage sludge along to the soil profile is very important to provide the parameters permiting to establish the relation between dosage and environmental impact. The propouse of this experiment is determinate the chemical changes in the soil and the leachate after application of increasing dosages of sewage sludge submitted to five leaching with deionized water. The treatments consisted to a fatorial (2 x 6), two were soils, a Oxisol with a clayey texture from Viçosa-MG and a Inceptsoil with a sandy texture from Ouro Branco-MG, and six dosages of sludge sewer including the control. The lower dosage was calculated based on quantity of nitrogen in sewage sludge, according to resolution № 375 CONAMA. The experimental unit consisted of nine rings made by PVC (o chloride polivinil) tubes with diameter of 6.6 cm and 10 cm height, with the exception of the lower ring that had 8 cm height. Were performed leaching tests with five volumes of deionized water equivalent to 1.5 times the pore volume at intervals of five days. Dosages of sewage sludge were efficient correcting the pH of both soils and increased the K, Ca, Cu, Zn, Fe, Mn and Ni, and the concentration of metals with the highest dosages reached levels critics, which the Mn both soils and NO3 - in soil sandy texture were the elements that had a higher problem leaching surpassing the limits established.