TY - JOUR
T1 - Reevaluation of Minamata Bay, 25 years after the dredging of mercury-polluted sediments
AU - Akito, Matsuyama
AU - Shinichiro, Yano
AU - Akihiro, Hisano
AU - Michiaki, Kindaichi
AU - Ikuko, Sonoda
AU - Akihide, Tada
AU - Hirokatsu, Akagi
N1 - Funding Information:
We acknowledge the financial support received in the form of a Grant-in-Aid for Scientific Research (B) (No. 24350080) from the Japan Society for the Promotion of Science.
Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2014/12/15
Y1 - 2014/12/15
N2 - A detailed investigation of mercury concentrations in the bottom sediments of Minamata Bay was performed in May, 2012. A total of 691 sediment samples were obtained from 107 sampling points in the bay. The weighted average total mercury concentration and the total mass of mercury in the bottom sediments of Minamata Bay were estimated to be 2.3. mg/kg dry weight basis and 3.4. tons, respectively. The average concentration of total mercury in the surface layer of the sediments was 3.0. mg/kg dry weight basis, and the distribution pattern of total mercury concentrations in the surface layer was found to have changed little in comparison to results reported 25. years ago. In addition, based on the results of seawater monitoring in Minamata Bay from 2010 to 2012, the amounts of total mercury and methylmercury mobilized from sediments and dissolved in the water column were 0.7 and 0.1. kg/yr, respectively.
AB - A detailed investigation of mercury concentrations in the bottom sediments of Minamata Bay was performed in May, 2012. A total of 691 sediment samples were obtained from 107 sampling points in the bay. The weighted average total mercury concentration and the total mass of mercury in the bottom sediments of Minamata Bay were estimated to be 2.3. mg/kg dry weight basis and 3.4. tons, respectively. The average concentration of total mercury in the surface layer of the sediments was 3.0. mg/kg dry weight basis, and the distribution pattern of total mercury concentrations in the surface layer was found to have changed little in comparison to results reported 25. years ago. In addition, based on the results of seawater monitoring in Minamata Bay from 2010 to 2012, the amounts of total mercury and methylmercury mobilized from sediments and dissolved in the water column were 0.7 and 0.1. kg/yr, respectively.
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U2 - 10.1016/j.marpolbul.2014.10.019
DO - 10.1016/j.marpolbul.2014.10.019
M3 - Article
C2 - 25455817
AN - SCOPUS:84913600300
VL - 89
SP - 112
EP - 120
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
SN - 0025-326X
IS - 1-2
ER -