Química Nova | |
Evaluation of chemical precipitation and encapsulation techniques in the treatment and joint disposal of liquid wastes containing chromium and laboratory glassware | |
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
【 预 览 】
Files | Size | Format | View |
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RO201912050594128ZK.pdf | 106KB | download |