Systematic analysis of unidentified chemicals and wastes

Quimica nova

Lima, Rosilda Maria Gomes¹  Afonso, Júlio Carlos²  Silveira, Jaqueline Amorim da²  Oliveira, Adriana de Sousa² 

[1] Instituto de Engenharia Nuclear, Rio de Janeiro;Universidade Federal do Rio de Janeiro, Rio de Janeiro

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

【 授权许可】

CC BY