JpGU-AGU Joint Meeting 2020

Presentation information

[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-HW Hydrology & Water Environment

[A-HW30] Hydrology & Water Environment

convener:Ayumi Kotani(Graduate School of Bioagricultural Sciences, Nagoya University), Takeshi Hayashi(Faculty of Education and Human Studies, Akita University), Keisuke Fukushi(Institute of Nature & Environmental Technology, Kanazawa University), Masahiro Tanoue(School of Engineering, The University of Tokyo)

[AHW30-10] Source Identification of Molybdenum in Natural Water Around Erdenet City, Mongolia

*Solongo Tsetsgee1,3, Fukushi Keisuke1, Altansukh Ochir3, Takahashi Yoshio2, Munemoto Takashi4, Akitoshi Akehi1, Ariuntungalag Yunden3, Enkhjin Odgerel3, Taivanbat Batbold3, Noriko Hasebe1 (1.Kanazawa University, 2.The University of Tokyo, 3.National University of Mongolia, 4.Industrial Research Institute of Ishikawa)

Keywords:Erdenet city, Surface water, Source identification

Erdenet city is second biggest city and located northern part of Mongolia. Increase of population, the environmental pollution is becoming serious concern. Erdenet mine is one of the largest copper – molybdenum mine in the world and mainly produced Cu – Mo. Surface water contaminated with high concentrations of molybdenum (Mo), but amount of Cu concentration is lowest with neutral pH. This study was systematically determining the source identification of Mo from rivers in Erdenet city. The water samples were collected from three rivers. Govil river flows from north west of the study area and merge to the Erdenet river. That two rivers are become a Khangal river.

Based on the spatial and temporal distribution of Mo concentration indicated the contaminated area and source of Mo was derived in August 2019. Govil river and Erdenet city centers are less than 30 µg/L. On the other hand, Erdenet and Khangal rivers are exceeds the WHO guideline 70 microgram per liter (µg/L) and higher than the world average. The tailing pond and ash pond seepage water was continuously drain to the downstream of the Erdenet and Khangal rivers. Due to sources of Mo is coming from mine tailing pond and ash pond of the power plant ranging 280 - 1700 µg/L. Groundwater was containing high concentration of Mo about 600 µg/L. Results suggest that the pond seepage water and groundwater are may main source of Mo contamination in the surface environment.


I would like to express my honest thanks to the financial supported agencies of the Higher Engineering Education Development Project, Functional material based on Mongolian Natural Minerals for Environmental Engineering, Cementitious and Float Process (No. J11A15), Biological Active Compounds and Useful Genes from Mongolian Plants, Microorganisms and their Application (No. J12A15), the Japan Society Promotion of Science (No. 17H06458) and the Environmental Research Project (No. 163288) from the Sumitomo Foundation. The study was performed as a cooperative research program of the Institute of Nature and Environmental Technology, Kanazawa University (No. 17039).