Abstract
In order to solve the problem of more and more iodinated by-products in water, the advanced oxidation system of peroxymonosulfate (PMS) activated by ferrous (Fe2+) was used to study the transformation process and principle of iodine ion (I−) as the initial target under different influencing factors in this system. The results showed that when the pH value was 3, the molar concentration ratio of Fe2+ and PMS was 0.8:1, the conversion effect was the best. When the concentration of I− was 20 μmol/L, the conversion rate of I− was 94 %. Under the action of sulfate radical (SO4 −), the final conversion product of I− is only iodate (IO3 −). With the increase of pH value, the conversion effect will also decrease. The concentration of I− itself also affects the reaction.
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