Systematic analysis of unidentified chemicals and wastes

Química Nova

Afonso, Júlio Carlos¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro¹  Instituto de Engenharia Nuclear, Rio de Janeiro¹  Silveira, Jaqueline Amorim da¹  Oliveira, Adriana de Sousa¹  Lima, Rosilda Maria Gomes¹ 

关键词: chemical waste;    unknown waste;    uranium and thorium recovery.;   

DOI  :  10.1590/S0100-40422005000100028

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work presents a detailed routine applied to the identification of unknown chemicals and wastes. 786 specimens were analyzed during 20 months. Unknown materials fell into three basic classes: (i) commercial chemicals without labels or illegible ones; (ii) laboratory synthesis products; (iii) used solvents (including mixtures). Uranium and thorium were recovered form their wastes. Unknown chemicals were mainly inorganic compounds, many of which had never been opened. Alkaline salts were dominant, but also precious metal compounds were identified. Laboratory synthesis products were organic compounds. The final destination depended on the nature of the chemical. Most organic compounds were sent to incineration; inorganic salts were distributed among several public organizations, including secondary and technical schools. The work described in this paper greatly reduced the amount of wastes that had to be sent to disposal.

【 授权许可】

Unknown