Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent Percolation
The sand columns inoculated with the indigenous microorganism (Aspergillus niger) were used to investigate the effect of bioclogging during the radioactive effluent percolation. The hydraulic gradient, volumetric flow rate, and uranyl ions concentration were monitored over time. The sand columns wer...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/9671371 |
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| author | Rong Gui Yu-xiang Pan De-xin Ding Yong Liu Zhi-jun Zhang |
| author_facet | Rong Gui Yu-xiang Pan De-xin Ding Yong Liu Zhi-jun Zhang |
| author_sort | Rong Gui |
| collection | DOAJ |
| description | The sand columns inoculated with the indigenous microorganism (Aspergillus niger) were used to investigate the effect of bioclogging during the radioactive effluent percolation. The hydraulic gradient, volumetric flow rate, and uranyl ions concentration were monitored over time. The sand columns were operated with continuous radioactive effluent of uranium tailings reservoir. After 68 days, the hydraulic conductivity of the sand columns decreased more than 72%, and the adsorption rate of uranyl ions by Aspergillus niger reached more than 90%. Environmental scanning electron microscope imaging confirmed the biofilm covering the surface of sand particles and connecting sand particles together, which resulted in a reduction of hydraulic conductivity. The results indicated that the propagation of Aspergillus niger can clog the seepage channel and effectively adsorb the uranyl ions of radioactive effluent in the porous media, which provides a suitable measure for controlling the migration of radioactive effluent of uranium tailings reservoir into the subsurface environment. |
| format | Article |
| id | doaj-art-b983305f5a5a45479ab4a2a0d4f4ee32 |
| institution | DOAJ |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-b983305f5a5a45479ab4a2a0d4f4ee322025-08-20T03:23:14ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/96713719671371Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent PercolationRong Gui0Yu-xiang Pan1De-xin Ding2Yong Liu3Zhi-jun Zhang4School of Resources and Safety Engineering, Central South University, Changsha, Hunan 420083, ChinaKey Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 420083, ChinaKey Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, ChinaKey Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, ChinaThe sand columns inoculated with the indigenous microorganism (Aspergillus niger) were used to investigate the effect of bioclogging during the radioactive effluent percolation. The hydraulic gradient, volumetric flow rate, and uranyl ions concentration were monitored over time. The sand columns were operated with continuous radioactive effluent of uranium tailings reservoir. After 68 days, the hydraulic conductivity of the sand columns decreased more than 72%, and the adsorption rate of uranyl ions by Aspergillus niger reached more than 90%. Environmental scanning electron microscope imaging confirmed the biofilm covering the surface of sand particles and connecting sand particles together, which resulted in a reduction of hydraulic conductivity. The results indicated that the propagation of Aspergillus niger can clog the seepage channel and effectively adsorb the uranyl ions of radioactive effluent in the porous media, which provides a suitable measure for controlling the migration of radioactive effluent of uranium tailings reservoir into the subsurface environment.http://dx.doi.org/10.1155/2018/9671371 |
| spellingShingle | Rong Gui Yu-xiang Pan De-xin Ding Yong Liu Zhi-jun Zhang Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent Percolation Advances in Civil Engineering |
| title | Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent Percolation |
| title_full | Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent Percolation |
| title_fullStr | Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent Percolation |
| title_full_unstemmed | Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent Percolation |
| title_short | Experimental Study on Bioclogging in Porous Media during the Radioactive Effluent Percolation |
| title_sort | experimental study on bioclogging in porous media during the radioactive effluent percolation |
| url | http://dx.doi.org/10.1155/2018/9671371 |
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