著者

張 瑞軍 鹿島 勇治 松井 三明 岡部 とし子 土井 陸雄

出版者

日本衛生学会

雑誌

日本衛生学雑誌 (ISSN:00215082)

巻号頁・発行日

vol.56, no.2, pp.492-499, 2001-07-15 (Released:2009-02-17)

参考文献数

26

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Total mercury in the muscles of three fish species was analyzed in fish caught in Tokyo Bay and the surrounding sea areas, Sagami Bay and Choshi. Tokyo Bay is a semi-closed sea area surrounded by Tokyo, Kanagawa and Chiba prefectures. Sagami Bay and Choshi are open to the Pacific Ocean. A total of 412 fish consisting of northern whiting (Sillago japonica), flatfish (Limanda yokohamae) and sardine (Sardinops melanosticta) were caught in these areas over a 6 months period from November 1998 to April 1999.Total mercury concentration ranged from 0.008-0.092μg/g (wet wt.) in northern whiting, 0.006-0.065μg/g in flatfish and 0.001-0.045μg/g in sardine. All concentrations were below the restriction limit of fish mercury in Japan, 0.4μg/g of total mercury concentration. A significant correlation was found between mercury concentrations and body length or body weight in northern whiting and flatfish, irrespective of the sea area. A correlation was also found between mercury concentration in fish and their feeding habits: among the 3 species caught in the same area, crustacean feeding northern whiting had the highest, polychaete feeding flatfish moderate, and plankton feeding sardine had the lowest mercury concentration.In a comparison of mercury concentration in the same species caught in different sea areas, a higher concentration was noted in fish caught in the semi-closed sea area of Tokyo Bay, than in fish caught in the open sea areas of Sagami Bay and Choshi. This difference was most marked in fish caught at the bottom of Tokyo Bay and we considered that the mercury concentration of seawater and sediment in these areas was the cause of mercury accumulation in fish. These findings suggest that improved water quality control and environmental monitoring is necessary in semi-closed sea areas such as Tokyo Bay.

著者

山本 貴士 長谷川 亮 鹿島 勇治 鈴木 幹夫 横田 大樹 吉田 幸弘 上東 浩 前原 裕治 木名瀬 敦 貴田 晶子

出版者

一般社団法人 廃棄物資源循環学会

雑誌

廃棄物資源循環学会研究発表会講演集 第25回廃棄物資源循環学会研究発表会

巻号頁・発行日

pp.547, 2014 (Released:2014-12-16)

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2011年3月の原発事故により,下水汚泥や焼却灰から放射性物質が高い濃度で検出される事例が東日本各地で多数報告され,原発事故由来の放射性物質に汚染された廃棄物の処理基準が定められたが,これまで廃棄物分野に特化した放射能濃度等の調査・測定法は存在しなかった。よって同年末に廃棄物等の放射能調査・測定法研究会から「廃棄物等の放射能調査・測定法暫定マニュアル」が発行された。その後,廃棄物関連分野での放射線・放射能の調査・測定に関しても事例や知見の集約が進んだことから,廃棄物資源循環学会内に設置された「廃棄物関連試料の放射能分析検討会」において改訂を行い、マニュアル(第2版)として公開した。今回は,この改訂されたマニュアルについて,改訂の経過と主な改訂点について紹介する。