Recuperação de compostos de iodo de reagentes e soluções laboratoriais

Vanessa da Matta dos Santos, Júlio Carlos Afonso
2012 Química Nova  
Recebido em 18/3/11; aceito em 1/7/11; publicado na web em 16/8/11 RECOVERY OF IODINE COMPOUNDS FROM LABORATORY CHEMICALS AND SOLUTIONS. 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 (I 2 ) by an oxidant (H 2 O 2 ) or reduction of oxidized iodine by red phosphorus or hydrazine. Both routes presented high
more » ... tes 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.
doi:10.1590/s0100-40422012000200029 fatcat:rhvqjuu4xze6da2dd4awb6wxka