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研究了腐殖酸浓度、溶液pH、温度以及无机离子等对Pu(Ⅵ)还原的影响,测定了Pu(Ⅵ)在模拟地下水中的还原速率。实验结果表明,随着腐殖酸浓度的增加、溶液pH的增大和温度的升高,Pu(Ⅵ)的还原速率明显加快。Fe~(2+)、F~-和SO_4~(2-)等离子对Pu(Ⅵ)还原速率也有很大影响。
The effects of humic acid concentration, solution pH, temperature and inorganic ions on the reduction of Pu (Ⅵ) were studied. The reduction rate of Pu (Ⅵ) in simulated groundwater was determined. The experimental results show that with the increase of humic acid concentration, the increase of solution pH and the increase of temperature, the reduction rate of Pu (Ⅵ) is obviously accelerated. The Fe (2 +), F ~ - and SO_4 ~ (2-) ions also have a great effect on the reduction rate of Pu (Ⅵ).