At the 2024th ZAIKEN Festa held on October 10, 3,Seiya KatoIsExcellence AwardThe Environmental Chemical Engineering Laboratory (Fuchida Laboratory), Department of Marine Resources and Energy, Graduate School of Science, is conducting joint research with Waseda University's Kagami Memorial Research Institute for Materials Science (hereinafter referred to as ZAIK), one of the leading research facilities in Tokyo equipped with numerous processing and surface analysis instruments (SEM, TEM, XPS, EPMA, etc.), and this time they introduced the results of their research. The poster used in the presentation will be exhibited at the main entrance of ZAIK for one year.

【Winner】
Seiya Kato (Master's degree student, Department of Marine Resources and Environmental Studies, Graduate School of Marine Science and Technology)1Years）

[Title of award-winning research]
Geochemical modelling of carbonate-containing mine wastewatersMnStudy of precipitation mechanism

[Details of award-winning research]
Mine wastewater containing high concentrations of heavy metals is still being generated in abandoned mines in Japan, and huge costs are being incurred for its treatment. In order to improve the treatment technology for manganese, which is a particularly difficult element to treat, we are conducting chemical reaction rate analysis using geochemical codes and the interaction between manganese precipitation and carbonate ions in the mine wastewater treatment system.XLinear absorption fine structure analysis (XAFS)The results were based on the analysis of the precipitates.Mn-HCO3By the generation of ionic speciesMn(II)The oxidation reaction mechanism of was clarified.

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Waseda University Kagami Memorial Institute for Materials Science and Technology