NITTA Yumiko    Department   Hiroshima shudo University  The Faculty of Health Sciences    Position   Professor
Language	English
Publication Date	2019/09
Type	Articles
Title	Oyster (Crassostrea Gigas) in the Hiroshima wide-area urban districts concentrate cadmium (Cd) in their shells.
Contribution Type	Single-Authored Publication
Journal	Studies in the Health Sciences
Journal Type	Japan
Publisher	Hiroshima Shodo University
Volume, Issue, Pages	3(1),pp.1-8
Author and coauthor	Yumiko Nitta
Details	To investigate the status of Cd in the oysters available in the Hiroshima wide area urban districts, cultured or wild oysters have been collected from the 7 prefectures in recent 5 years. Concentrations of the two heavy metals, Cd and Zn, were measured by the sediment detemining methods with the instrument for atomic absorption spectrometry in their shells. Oysters were found to accumulate a certain amount of Cd from sea into shells. The concentration was 0.16±0.07 mg/kg in average with the range of 0.15 ~ 0.25 mg/kg. Since the average Cd was high in the wildlife kidney, present data of Cd concentrated in oyster shells would support the specultion that the accumulation of Cd in wildlife could be caused by the agricultural land, where the fertilizers blended with oyster shells were spred. The human activity to reuse oyster shells as one of the fertilizer components adds burden of Cd on our sanitary environment.