Japan Geoscience Union Meeting 2015

Presentation information


Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS26] Biogeochemistry

Thu. May 28, 2015 11:00 AM - 12:45 PM 104 (1F)

Convener:*Muneoki Yoh(Tokyo University of Agriculture and Technology), Shibata, Hideaki(Field Science Center fot Northern Biosphere, Hokkaido University), Naohiko Ohkouchi(Japan Agency for Marine-Earth Science and Technology), Youhei Yamashita(Faculty of Environmental Earth Science, Hokkaido University), Chair:Yoshinori Takano(Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Seiya Nagao(Institute of Nature and Environmental Technology, Kanazawa University), Izumi Watanabe(Graduate School of Agriculture, Tokyo University of Agriculture and Technology), Yoriko Yokoo(同志社大学理工学部)

12:15 PM - 12:30 PM

[MIS26-13] Contamination by arsenic, manganese and barium in groundwater and human health risk in Vietnam

*Tetsuro AGUSA1, Takashi KUNITO2, Suguru INOUE1, Tu Binh Minh3, Nguyen Minh Tue1, Nguyen Ngoc Ha4, Nguyen Phuc Cam Tu4, Pham Thi Kim Trang3, Shin TAKAHASHI5, Bui Cach Tuyen6, Pham Hung Viet3, Hisato IWATA1, Shinsuke TANABE1 (1.Center for Marine Environmental Studies (CMES), Ehime University, Japan, 2.Faculty of Science, Shinshu University, Japan, 3.Hanoi University of Science, Vietnam National University, Vietnam, 4.Faculty of Fisheries, Nong Lam University, Vietnam, 5.Faculty of Agriculture, Ehime University, Japan, 6.Research Institute for Biotechnology and Environment (RIBE), Nong Lam University, Vietnam)

In this study, we investigated contamination by arsenic and other trace elements in groundwater and in the Red River and the Mekong River Deltas, Vietnam. In addition, we evaluated human health risk from consumption of the contaminated groundwater. Concentrations of arsenic in groundwater were in the range of <0.1 - 502 μg/l, with about 39% of these water samples exceeding WHO drinking water guideline of 10 μg/l. Interestingly, 31% and 5% of groundwater samples had higher concentrations of manganese (400 μg/l) and barium (700 μg/l) than WHO guidelines for drinking water, respectively. Concentrations of arsenic, manganese and barium in hair of local residents were positively correlated with those in groundwater. Estimation using hazard quotient showed that about 43 % of groundwater samples have potential human health risks associated with intakes of these elements. These results suggest that people in these regions are exposed to arsenic, manganese and barium through the consumption of groundwater and hence potential health risks of these elements are of great concern for these local people.