Avaliação das técnicas de precipitação química e encapsulamento no tratamento e destinação conjunta de resíduos líquidos contendo cromo e vidrarias de laboratório

Química Nova

Juliana Graciela Giovannini¹  Glauco Arnold Tavares¹  José Albertino Bendassolli¹ 

[1] ,Universidade de São Paulo Centro de Energia Nuclear na Agricultura Piracicaba SP ,Brasil

关键词: wastes;    chromium;    encapsulation;   

DOI  :  10.1590/S0100-40422008000300035

来源: SciELO

【 摘 要 】

In this paper, we present procedures for the treatment and final disposal of residual solutions containing chromium, in order to evaluate the effectiveness of chemical precipitation of the metal and the potential of the glass encapsulation technique, using broken laboratory glassware. The results demonstrated that pH-values convenient for chemical precipitation are between 10 - 11. With regard to Cr(OH)3 encapsulation, the leaching and solubilization tests allowed to classify the waste as non-dangerous and non-inert. Finally, it is pointed out that the adoption of waste management practices in universities should be encouraged, helping to train professionals skilled in good laboratory practices.

【 授权许可】

CC BY-NC   
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