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Performance and Mechanism Study of STPP-nZVI for Remediation of Uranium-contaminated Groundwater
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Guicheng HE, Jiaxin CUI, Hui ZHANG, Shenping ZHANG
Uranium Mining and Metallurgy | 2024, 43(3) : 74 - 85
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Uranium Mining and Metallurgy | 2024, 43(3): 74-85
• SAFETY AND ENVIRONMENT PROTECTION •
Performance and Mechanism Study of STPP-nZVI for Remediation of Uranium-contaminated Groundwater
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Guicheng HE, Jiaxin CUI, Hui ZHANG, Shenping ZHANG
Affiliations
  • School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
Published: 2024-08-20 doi: 10.13426/j.cnki.yky.2024.04.03
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Uranium is an important strategic resource as well as a heavy metal element with chemical and radioactive toxicity. Currently, the efficient remediation of uranium in groundwater from uranium mines remains a huge challenge for environmental protection and ecological security. In this study, sodium tripolyphosphate was used to modify nano zero-valent iron (nZVI), successfully preparing STPP-nZVI. The effects of solution pH, STPP-nZVI dosage, temperature, time, U(VI) concentration, and interfering ions on the STPP-nZVI-mediated remediation of U(VI) in groundwater were investigated. FTIR, SEM-Mapping, and XPS were employed to explore the mechanism underlying STPP-nZVI’s remediation of uranium-contaminated groundwater. The results indicate that STPP-nZVI is suitable for treating weakly acidic and alkaline uranium-contaminated groundwater. At a pH of 5.0, the maximum adsorption capacity of STPP-nZVI for U(VI) reached 102.72 mg/g, with U(VI) adsorption occurring as a spontaneous endothermic process. The removal of uranium by STPP-nZVI is primarily attributed to adsorption and reduction. STPP-nZVI materials demonstrate promising application prospects for treating weakly acidic and alkaline uranium-contaminated groundwater.

nano zero-valent iron  /  sodium tripolyphosphate  /  uranium  /  groundwater  /  groundwater remediation
Guicheng HE, Jiaxin CUI, Hui ZHANG, Shenping ZHANG. Performance and Mechanism Study of STPP-nZVI for Remediation of Uranium-contaminated Groundwater[J]. Uranium Mining and Metallurgy, 2024 , 43 (3) : 74 -85 . DOI: 10.13426/j.cnki.yky.2024.04.03
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Year 2024 volume 43 Issue 3
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doi: 10.13426/j.cnki.yky.2024.04.03
  • Receive Date：2024-04-02
  • Online Date：2025-07-04
  • Published：2024-08-20
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  • Received：2024-04-02
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    School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
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https://castjournals.cast.org.cn/joweb/yky/EN/10.13426/j.cnki.yky.2024.04.03
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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