DISPOSAL OF ARSENIC FROM SULFUR DIOXIDE-CONTAINING SOLUTIONS

摘要

The process provides a method of removing arsenic from solutions containing sulfur dioxide in an environmentally acceptable manner. This process first oxidizes arsenic, iron and sulfur dioxide contained in an aqueous solution to pr epare the solution for precipitation and to improve process control. Recycled neutralized precipitate seeds the oxidized aqueous solution. A calcium-containing base preci pitates products of neutralization on the seeds. The final neutralized precipitate conta ins a stable ferric arsenate compounds.