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Geochemical Modeling of the Uranium Behavior in Groundwater near the Sludge Storages during Bioremediation
Geochemistry International ( IF 0.8 ) Pub Date : 2021-02-08 , DOI: 10.1134/s0016702921010080
A. V. Safonov , A. E. Boguslavsky , K. A. Boldyrev , O. L. Gaskova , O. S. Naimushina , N. M. Popova

The paper presents experimental and numerical simulation of the bioremediation in nitrate-, -sulfate-ions and uranium polluted aquifers near the Novosibirsk Chemical Concentrates Plant (NCPP) sludge storage facility. We used two HCh 4.4 (MSU) and PHREEQC 2.18 (USGS) software packages for geochemical modeling and found that the microbial consumption of oxidizers (oxygen and nitrate ions) led to a decrease in the redox potential to –400 mV. The latter plays a key role in the reduction of uranyl ions and stabilization (immobilization) of uranium in low soluble biogenic sediments containing calcium phosphates, sulfides of iron and associated heavy metals. Results of experimental and numerical simulation turned out to be consistent with the composition of mineral phase collected in situ in a discharge area of polluted aquifer.



中文翻译:

生物修复过程中污泥存储附近地下水中铀行为的地球化学模拟

本文介绍了新西伯利亚化学浓缩物厂(NCPP)污泥存储设施附近硝酸根,硫酸根离子和铀污染的含水层中生物修复的实验和数值模拟。我们使用两个HCh 4.4(MSU)和PHREEQC 2.18(USGS)软件包进行地球化学建模,发现氧化剂(氧和硝酸根离子)的微生物消耗导致氧化还原电位降低至-400 mV。后者在减少可溶性磷酸根,铁的硫化物和相关重金属的生物可溶性沉积物中的铀酰离子还原和铀的稳定(固定化)中起关键作用。实验和数值模拟的结果证明与在被污染含水层的排放区域中就地收集的矿物相的组成一致。

更新日期:2021-02-09
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