Evaluation of chemical precipitation and encapsulation techniques in the treatment and joint disposal of liquid wastes containing chromium and laboratory glassware

Quimica nova

Bendassolli, José Albertino¹  Giovannini, Juliana Graciela¹  Tavares, Glauco Arnold¹ 

[1] Universidade de São Paulo, Piracicaba, Brasil

关键词: wastes;    chromium;    encapsulation.;   

DOI  :  10.1590/S0100-40422008000300035

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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

【 授权许可】

CC BY