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Gerenciamento de resíduos químicos e águas servidas no laboratório de isótopos estáveis do CENA/USP

2003; Brazilian Chemical Society; Volume: 26; Issue: 4 Linguagem: Inglês

10.1590/s0100-40422003000400028

1678-7064

José Albertino Bendassolli, Everaldo Máximo, Glauco Arnold Tavares, Raquel de Fátima Ignoto,

Chemical Synthesis and Characterization

THE CENA/USP.A system for disposal and recovery of the main effluents and chemical waist from isotope separation plants and enriched compounds-15 N and 34 S production has been carried out at the Stable Isotope Laboratory (LIE) of the CENA/USP.Around four hundred thousand liters of effluents has been recovered yearly.Among the recovered chemical wastes, the more relevant are: ammonia; brome; ammonium and sodium sulfate; sodium hydroxide; sulfur dioxide; and hydrochloric acid.Chemical wastes containg recoverable heavy metals (Ag, Cr and Cu) and solvents (methanol, ethanol and acetone) are processed and recovered.Gaseous emissions, mainly H 2 S are used for recovery of heavy metals solutions.The minimization of the residues waters, as well the reduction of electric energy consume was established using a water deionization system.A cost/effect balance of the process is reported.