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| Sulfate Reduction with Fruit Peel Fermented Solution and Effect of Desulfidation for Acidic Uranium-laden Sulphate Wastewater |
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Received:February 26, 2022
Revised:March 12, 2022
Accepted:March 14, 2022
Published Online:May 11, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.06.013 |
| KeyWord:sulfate-reducing bacteria；fruit peel fermented solution；decommissioned acid in-situ uranium mine；groundwater |
| Author | Institution |
| ZHANG lin-lin |
东华理工大学 |
| LIU Ya-jie |
东华理工大学 |
| CHEN Shi-yi |
东华理工大学 核资源与环境国家重点实验室;东华理工大学 水资源与环境工程学院 |
| SUN Zhan-xue |
东华理工大学 核资源与环境国家重点实验室;东华理工大学 水资源与环境工程学院 |
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| Abstract: |
| Potential contamination of low pH，high SO42- and uranium concentration exists in groundwater after acid in-situ uranium leaching mines decommissioned. For this type of contaminated groundwater, a mixture enrichment, A3m-21ZLL, with dominant of Sulfate-Reducing Bacteria (SRB) which enriched from tailing heap of a uranium mine in southern China, was used to investigate the sulfate reducing capability, main influenced factors and effect of desulfidation to a acidic uranium-laden sulphate groundwater with apple peel fermented products as carbon source. The results show that the mix enrichment A3m-21ZLL is of better utilization for the apple peel fermentation products, the best m(COD)/m(SO42-) value is 7, and the best inoculum amount is 10%. The original concentration of SO42-, Fe2+ and U6+ in decommissioned uranium groundwater is 960.737, 47.6, 1.095 mg/L respectively, and the removal rate reaches 91.8%, 97.2% and 88.6%, respectively, and pH value rises from 3.98 to 5.78 after desulfidation. Among them, concentration of SO42- and Fe2+, and pH value meet the Chinese Groundwater Quality Criteria GB/T 14848—2017, Grade Ⅳ. It is feasible to treat uranium-laden sulfate groundwater by sulfate reducing bacteria with peel fermented solution as carbon source, the treatment effect is good, and the application prospect is very promising. |
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