Influences of Iron and Cerium on Photoreduction Separation of Europium

Abstract

Abstract: In this paper, the influences of iron and cerium on the yield and induction time of photore-duction of europium are investigated with a low pressure mercury lamp(20 W) as the light source, the mixture of formic acid and sodium formate as the scavenger for OHradical and sodium sulfate as the precipitating agent for europium ( Ⅱ). The results show that the iron (Ⅱ) and cerium ( Ⅲ ) can be oxidized to iron (Ⅲ ) and cerium (Ⅳ ) in the photochemical process, and the europium ( Ⅱ ) is oxidized by iron ( Ⅲ ) and cerium (Ⅳ ) formed in this system, so that the yield of photoreduction of europium is decreased and the induction time of photochemical process is increased respectively with increasing of concentrations of iron and cerium in the solution to be photolyzed.

Key words: Photoreduction, Photooxidation, Iron, Cerium, Europium

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Li Ruixiang, Yang Rudong. Influences of Iron and Cerium on Photoreduction Separation of Europium[J]. Chem. J. Chinese Universities, 1990, 11(2): 212.

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Influences of Iron and Cerium on Photoreduction Separation of Europium

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