Host: The Japan Society of Waste Management Experts
In this study, potassium iodide (KI) was found capable of reducing selenium(VI) to selenium(IV). When KI was added to Se(VI) solution, the Se(VI) concentration dropped rapidly, as the KI/Se(VI) molar ratio increased. Using the potential-pH equilibrium diagram for the selenium/water system, we confirmed that the Se(VI) was reduced to Se(IV) because the potential of the solution shifted to the stable Se(IV) region on the addition of KI. This reduction accompanies the oxidation of I– to I3–. The reduction of Se(VI) by KI was found to be effective for concentrated Se(VI) solutions.
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management
