Laboratory waste management: recovery of elements and final disposal

Química Nova

Freidinger, Nicolas¹  Afonso, Júlio Carlos¹  Noronha, Leandro Anido¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro¹  Felipe, Renata Pinheiro¹ 

关键词: residue;    metals recovery;    waste treatment.;   

DOI  :  10.1590/S0100-40422003000400027

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work shows some laboratory waste management developed in order to recover some elements or to prepare the waste for a correct final disposal. The 25 elements chosen cover basically all chemical behaviors found for the metals in the Periodic Table. The treatments adopted were based on the classical behavior in aqueous solution (wet chemistry) but an important condition for a full success was the previous knowledge of the qualitative composition of the wastes treated. Some general trends were found: the final liquid waste was always saline and normally presented a higher volume than the original waste; most original wastes were acid in nature; steps such as solid-liquid separation, washing, evaporating and calcining were currently performed. This work was also a very good experience in chemistry in solution for students and showed them the need of treating wastes for a better environment.

【 授权许可】

Unknown