日本福岛核事故后四川省部分生态系统和食物链的γ核素放射性水平调查

本文调查和掌握了四川省部分生态系统中放射性水平,分析了日本福岛核泄漏事故中放射性核素对四川省主要环境介质的影响和放射性核素的迁移和富集情况,了解此次事故对部分食物链和生态系统的影响程度。对气溶胶、沉降物、土壤、植物、动物、人类食物这一链条样品中的238U、232Th、226Ra、40K、137Cs、131I 6种放射性核素进行检测,结果表明,天然放射性核素238U、232Th、226Ra、40K的检测结果均属于环境正常水平,人工放射性核素137Cs、131I低于仪器检出限。所有样品的检测结果均符合相关国家标准,与环境背景值相当,日本福岛核事故在短时间内,未对四川省生态环境和食物链造成放射性影响。

Survey on the Radioactivity Level of γ Nuclides in Partial Ecosystem and Food Chain in Sichuan Province after Japan＇s Fukushima Nuclear Accident

This article investigated the radioactivity level in partial ecosystem and analyzed the influence of radionuclides from Japan＇s Fukushima nuclear accident on main environmental medium and the migration and concentration situation of radionuclides in Sichuan Province, and also analyzed the impact of Japan＇s Fukushima nuclear accident in partial food chain and ecosystem. This study had detected six radionuclides （^238U,^232Th ^226 Ra、^40K, ^137Cs ,^131I） from the samples in the chain of aerosol, sediment, soil, plants, animals and human food . The results showed that the natural radionuclides （^238U、^232Th、^ 226 Ra,^40K） were at normal environmental levels, and the artificial radionuelides （^137 Cs ^131I） were below the detection limit of the instrument. The results from all samples were up to national standards and were equivalent to the environmental background values. Thus, the Japan＇s Fukushima nuclear accident has caused no radiological impact on the environment and food chain of Sichuan in a short time.