Reevaluation of Minamata Bay, 25 years after the dredging of mercury-polluted sediments
Reevaluation of Minamata Bay, 25 years after the dredging of mercury-polluted sediments
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DOI：
10.1016/j.marpolbul.2014.10.019
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发表时间：
2014-12-15
影响因子：
5.8
通讯作者：
Hirokatsu, Akagi
中科院分区：
文献类型：
--
作者：
Akito, Matsuyama;Shinichiro, Yano;Hirokatsu, Akagi
2012年5月对水俣湾底质中的汞浓度进行了详细调查。在海湾的107个采样点共获得691个沉积物样品。水俣湾底部沉积物中汞的加权平均总浓度和总质量分别估计为2.3 mg/kg干重和3.4吨。沉积物表层中总汞的平均浓度为3.0 mg/kg干重，与25年前报告的结果相比，表层中总汞浓度的分布模式变化不大。此外，根据2010年至2012年对水俣湾海水的监测结果，从沉积物中移动的总汞和溶解在水柱中的甲基汞的量分别为0.7和0.1千克/年。(C)2014爱思唯尔有限公司版权所有。
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. (C) 2014 Elsevier Ltd. All rights reserved.