摘要
本文报道了以低压汞灯做光源,HCO_2H-HCO_2Na做自由基清除剂,Na_2SO_4做光还原产物Eu(Ⅱ)的沉淀剂,在改变自由基清除剂、沉淀剂和稀土离子浓度、溶液的酸度和光强度的条件下,研究了从铕和其它镧系元素氯化物的二元混合物中光还原分离提取铕的问题,同时测定了沉淀的组成以及元素间的分离因数(β).
Europium (Ⅲ) chloride was effectively photoreduced and precipitated Eu(Ⅱ)
sulfate from aqueous solution by making use of HCO_2H-HCO_2Na (1:1) as radical
scavenger and under radiation of a low pressure mercury lamp (20 W). The formation
of reduction product EuSO_4 was confirmed through chemical analysis, measurement of
magnetic susceptibility, as well as X-ray diffraction. The separation factors between
europium and other rare earth elements were also determined. Furthermore, the factors
affecting the photoreduction process, such as the concentration of scavenger and that of
precipitating agent, the acidity of the solution, were carefully studied.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1989年第9期861-866,共6页
Acta Chimica Sinica
基金
国家自然科学基金资助的项目
