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

Química Nova

Bendassolli, José Albertino¹  Giovannini, Juliana Graciela¹  Universidade de São Paulo, Piracicaba, Brasil¹  Tavares, Glauco Arnold¹ 

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 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】

Unknown