Geochemical Modeling of the Uranium Behavior in Groundwater near the Sludge Storages during Bioremediation
| Autor: | Anatoly E. Boguslavsky, Nadejda Popova, Alexey Safonov, Olga Gaskova, O. S. Naimushina, K. A. Boldyrev |
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| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category 020209 energy chemistry.chemical_element Aquifer 02 engineering and technology Uranium 010502 geochemistry & geophysics Uranyl 01 natural sciences Redox chemistry.chemical_compound Geophysics Bioremediation Nitrate chemistry Geochemistry and Petrology Environmental chemistry 0202 electrical engineering electronic engineering information engineering Environmental science Groundwater 0105 earth and related environmental sciences Geochemical modeling |
| Zdroj: | Geochemistry International. 59:56-65 |
| ISSN: | 1556-1968 0016-7029 |
| DOI: | 10.1134/s0016702921010080 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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