Recovery of iodine compounds from laboratory chemicals and solutions

Quimica nova

Afonso, Júlio Carlos¹  Santos, Vanessa da Matta dos¹ 

[1] Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil

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

【 授权许可】

CC BY