著者

高岡 路枝 吉永 淳 田中 敦

出版者

一般社団法人 日本環境化学会

雑誌

環境化学 (ISSN:09172408)

巻号頁・発行日

vol.17, no.4, pp.629-634, 2007-12-18 (Released:2008-10-24)

参考文献数

12

被引用文献数

2 1

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The concentrations of heavy metals (V, Mn, Co, Cu, Zn, Cd, Ba, in addition to Pb which was reported elsewhere) in surface soil samples collected from 31 public playgrounds in a ward in Tokyo were determined by ICP mass spectrometry after HNO3/HF/HClO4 digestion. Mean concentrations of all metals but Ba exceeded the levels of uncontaminated soils in Japan reported in the previous literature indicating the presence of soil pollution. The exposure to V via direct soil ingestion was estimated to contribute more than that via dietary intake; however, it was not serious enough to warrant immediate attention. For other metals, dietary exposure accounted much more than soil ingestion. There were strong positive correlations between metal concentrations in the soil samples, particularly between V and Mn (r=0.97), V and Co (r=0.95), Pb and Cu (r=0.75), or Pb and Zn (r=0.84). These correlations suggested that the metals, to a certain extent, shared common pollution source.