黎诗宏;梁斌;李忠惠;徐志强;

• 1:西南科技大学环境与资源学院
• 2:四川省地质调查院

摘要(Abstract)：

在成都平原选取了2个镉污染程度不同的区域,测定了污染区内稻米样本中的Cd、Zn质量分数,分析了这些元素含量随污染程度的变化,探讨了农民就地消费稻米的安全性。结果表明,中度(Ⅲ类土)、重度(超Ⅲ类土)Cd污染区稻米Cd质量分数超标严重,超标率分别达75%和100%,而且重度污染区稻米中的Cd含量是中度污染区的近5倍,但Zn含量差异很小,表明随着土壤Cd含量的增加,会加剧稻米Cd累积和Zn的相对缺乏,从而进一步降低食品的安全性;中度Cd污染区65%、重度Cd污染区92%的稻米样品Cd/Zn比值超过了食物Cd/Zn的健康临界值0.015。分别参照WHO和USEPA推荐的成人RFD(Cd)值和当地居民习惯食物消费结构,分析表明对于农民就地消费稻米来说均存在较大程度的潜在Cd暴露风险,特别是重度污染区。因此,对于成都平原Cd污染区,研究相应的控制Cd污染技术并采取适宜的膳食结构做调节,来确保每日饮食中Cd的安全含量显得尤为迫切。

关键词(KeyWords)： 稻米;重金属;暴露风险;成都平原

Abstract:

Keywords:

基金项目(Foundation): 中国地质调查局项目(1212010511202);; 四川省国土资源厅科技项目(KJ-2012-3);四川省国土资源厅地勘基金项目(201402);; 国家自然科学基金项目(41472310)

作者(Author): 黎诗宏;梁斌;李忠惠;徐志强;

Email:

DOI:

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