A mercury concentration in the Kagoshima Bay - A biological concentration form volcanic ashes and gases, sea water, plankton, and shellfish to human -

对鹿儿岛湾的海水和贝类、火山灰、雨水、河流沉积物和鹿儿岛市垃圾焚烧炉周围地区表层土壤的汞含量进行了测量，以寻找鹿儿岛湾汞的来源。结果如下：1鹿儿岛湾26个监测站海水样品汞含量在6.3 ~ 19.7 ng/l之间。将26个监测站划分为海湾入口处、中部、内部和樱岛周围水域4个区域，结果表明，樱岛周围水域的汞含量明显高于海湾入口处和海湾内部。樱岛沿岸的海水样品甲基汞含量低于水俣至百根港，但高于水俣至游野古海岸位于湾区最内层的亮岸站鱼类的汞含量明显高于其他收集站。此外，还发现了鱼类种类与采样站之间的显著相互作用从每条河口1公里处获得的河流沉积物中汞含量为4至96马克/公斤。来自宽河的河流沉积物中的汞含量高于其他五条被检查的河流。以垃圾焚烧炉为中心点，在8个方向上每0.5公里从表层土壤中获得的汞含量为6 ~ 128马克/公斤；然而，距离和方向均无显著差异。鹿儿岛湾汞的可能来源主要是樱岛火山喷发产物和部分人为产物，如含汞农药。湾内汞含量保持不变，樱岛火山活动增加所产生的喷发产物与行政管制所减少的人为产物之间的汞平衡状态。应监测鹿儿岛湾环境中的汞，以预防因食用受汞污染的鱼类而引起的人类疾病。少

Mercury contents of samples of sea water and shellfish from Kagoshima Bay, volcanic ashes, rain water, sediments in rivers, and the surface soil from the area surrounding a waste incinerator in the city of Kagoshima were measured to search for the source of mercury in Magoshima Bay. The results obtained were as follows :I Mercury contents of sea water samples at 26 stations in Kagoshima Bay ranged from 6.3 to 19.7 ng/l. When the 26 stations were classified into four areas, the entrance, the middle and the interior of the Bay, and the water around the Sakurajima area, mercury contents of the samples from the last area were significantly higher than either at the entrance or in the interior of the Bay. Methylmercury contents of sea water samples at the coast around Sakurajima were lower than those at the Minamata-Hyakken port, but higher than those at the coast of Minamata-Yunoko.2 Mercury contents of fish from the shine coast station, the innermost part of the Bay, were significantly hi … More gher than those from the other collecting stations. Moreover, significant interactions between the species of fish and the sampling stations were detected.3 River sediments obtained 1 km from the mouth of each river contained from 4 to 96mug/kg of mercury. Mercury contents of the river sediments from the Wide river were higher than those from the other five rivers examined. Mercury contents obtained from the surface soils every 0.5 km in eight directions, with the waste incinerator as the central point, ranged from 6 to 128 mug/kg ; however, neither distance nor direction showed significant differences.Possible sources of mercury in Kagoshima Bay were mainly eruptive products of Mt. Sakurajima and partly man-made products such as mercury-containing pesticides. Mercury levels in the bay remain unchanged with a state of mercury balance between the eruptive products from the increasing activity of Mt. Sakurajima and the reduction of man-made ones by administrative control. Mercury in the environment of Kagoshima Bay should be monitored for the prevention of human disease caused by consuming mercury contaminated fish. Less