MANAGEMENT OF CHEMICAL ASSAY WASTES FROM SOIL AND PLANTS IN THE NATIONAL RESEARCH CENTER FOR RICE AND BEANS (CNPAF)

Abstract

Current research reports on the management of solid wastes produced in soil and plant analyses at the Laboratory of Agro-environmental Analysis (LAA) of the National Research Center for Rice and Beans (CNPAF) as a single experience in Brazilian bibliography. The latter comprises identification of toxological risks, description of chemical composition, classification, reduction of generation and treatment of wastes. Management of solid wastes complies with the Brazilian Policy for Solid wastes - PNRS (Law 12305 published in 2010). The origin, toxicity and treatment of LAA toxic wastes and measures adopted for the reduction of the environmental produce generated are detailed. Residues from the laboratory derive from chemical analyses of soil and vegetal tissues, with special toxic rates: cyanide treated with carbonic gas oxidation and chromium treated by precipitation with 90% reduction. LAA evaluated the possibility of recycling or reutilization such as the ceramic pigment of the waste with chromium. LAA is important because it applies PNRS efficiently even though results require automatization to make viable the recycling or reutilization of wastes.