ニッタ　ユミコ   NITTA Yumiko   新田　由美子    所属   広島修道大学  健康科学部    職種   教授
言語種別	英語
発行・発表の年月	2019/09
形態種別	学術論文
標題	Oyster (Crassostrea Gigas) in the Hiroshima wide-area urban districts concentrate cadmium (Cd) in their shells.
執筆形態	単著
掲載誌名	Studies in the Health Sciences
掲載区分	国内
出版社・発行元	Hiroshima Shodo University
巻・号・頁	3(1),pp.1-8
著者・共著者	Yumiko Nitta
概要	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.