Title of article :
Reevaluation of Minamata Bay, 25 years after the dredging of mercury-polluted sediments
Author/Authors :
Akito، نويسنده , , Matsuyama and Shinichiro، نويسنده , , Yano and Akihiro، نويسنده , , Hisano and Michiaki، نويسنده , , Kindaichi and Ikuko، نويسنده , , Sonoda and Akihide، نويسنده , , Tada and Hirokatsu، نويسنده , , Akagi، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
9
From page :
112
To page :
120
Abstract :
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.
Keywords :
Outflow , Spatial distribution , Total-Hg , sediment , Minamata Bay
Journal title :
Marine Pollution Bulletin
Serial Year :
2014
Journal title :
Marine Pollution Bulletin
Record number :
1989087
Link To Document :
بازگشت