Recovery of iodine compounds from laboratory chemicals and solutions

Química Nova

Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Afonso, Júlio Carlos¹  Santos, Vanessa da Matta dos¹ 

关键词: iodine;    waste treatment;    element recovery.;   

DOI  :  10.1590/S0100-40422012000200029

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work presents simple routes to recover iodine compounds from oxidized laboratory chemicals and aqueous solutions (HI and KI) used in laboratory chemistry classes. These routes are based on the oxidation of iodide ions (I-) to iodine (I2) by an oxidant (H2O2) or reduction of oxidized iodine by red phosphorus or hydrazine. Both routes presented high yields. The oxidative route is of general use whereas the reductive one is appropriate for restoring original iodine reagents. Final wastes were generated in low amounts. This work is appropriate for teaching many laboratory techniques (e.g., distillation, titration and filtration) in the chemical laboratory.

【 授权许可】

Unknown