Migration and transformation of manganese during the artificial recharging of a deep confined aquifer |
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| Authors: | Xiancang Wu Wenjing Zhang Shanghai Du XuFei Shi Xipeng Yu Ying Huan Hanmei Wang Xun Jiao |
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| Institution: | 1.Key Laboratory of Groundwater Resources and Environment, Ministry of Education,Jilin University,Changchun,China;2.College of Environment and Resources,Jilin University,Changchun,China;3.Shanghai Institute of Geological Survey,Shanghai,China;4.Shanghai Engineering Research Center of Land Subsidence,Shanghai,China;5.Key Laboratory of Land Subsidence Monitoring and Prevention,Shanghai,China |
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| Abstract: | Field tests and laboratory experiments were performed, using an artificial groundwater recharging site in Southeast China as an example, to investigate the migration and transformation of manganese during the artificial recharging of a deep confined aquifer. The migration and transformation of total manganese and divalent manganese (Mn(II)) were influenced by mixing, oxidation reactions, and the dissolution of minerals containing manganese, and increasing the dissolved oxygen (DO) concentration was found to promote the dissolution of minerals containing manganese. The laboratory experiments showed that the retardation factors were higher upstream than downstream of the recharging hole. The amount of dissolution that occurred decreased, and the amount of mixing that occurred increased as the distance from the recharging hole increased. The DO concentration decreased as the amount of dissolution of minerals containing manganese that occurred decreased. A high temperature, a high DO concentration, and the presence of microorganisms were found to promote the dissolution of minerals containing manganese, which caused the total manganese and Mn(II) concentrations to increase. |
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