| 前郭灌区水稻籽粒重金属含量特征及风险评价 |
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| 引用本文： | 朱立禄,阎百兴,王莉霞.前郭灌区水稻籽粒重金属含量特征及风险评价[J].中国环境科学,2011,31(1):144-149. |
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| 作者姓名： | 朱立禄 阎百兴 王莉霞 |
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| 作者单位： | 1. 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室,吉林长春,130012;中国科学院研究生院,北京,100049
2. 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室,吉林长春,130012 |
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| 基金项目： | 国家自然科学基金资助项目，中国科学院知识创新工程重要方向资助项目 |
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| 摘 要： | 于2008年秋季,在第二松花江(二松)下游的前郭灌区内,采集具有不同灌溉史水田的水稻籽粒样品23个,测定稻米和稻壳中Hg、Cd、Cu、Zn、Ni和Cr的含量,讨论了重金属累积特征,并分别采用单项污染指数法和内梅罗综合污染指数法对稻米重金属含量水平进行了风险评价.结果表明,灌溉史越长的水田稻米中Hg含量越高,而稻米中Cd、Cu、Zn、Ni和Cr的含量与水田灌溉史的关系不明显.稻米与稻壳中重金属含量顺序基本一致.Zn在稻米中的含量高于稻壳,其余重金属在稻壳中的含量高于稻米.单项污染指数法评价结果显示仅有1例稻米样品Ni含量超过国家标准含量限值.稻米样品重金属内梅罗综合污染指数为0.33~0.91,平均值为0.51,总体处于安全级水平.通过对稻米重金属的研究发现,长期提取二松江水灌溉导致水田稻米中Hg出现累积,但其累积水平很低,未构成生态风险.以二松为主要水源的哈达山水库建成后,通过灌溉对当地粮食安全造成的影响也较低.
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| 关 键 词： | 第二松花江 前郭灌区 水稻籽粒 重金属 风险评价 |
| 收稿时间： | 2010-05-09; |
Heavy metal content characteristics and assessment of rice grain from Qianguo Irrigation Area, Jilin Province |
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| ZHU Li-lu,YAN Bai-xing,WANG Li-xia.Heavy metal content characteristics and assessment of rice grain from Qianguo Irrigation Area, Jilin Province[J].China Environmental Science,2011,31(1):144-149. |
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| Authors: | ZHU Li-lu YAN Bai-xing WANG Li-xia |
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| Institution: | ZHU Li-lu1,2,YAN Bai-xing1,WANG Li-xia1(1.Key Laboratory of Wetland Ecology and Environment,Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China). |
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| Abstract: | A total of 23 rice grain samples were collected from paddy fields with different irrigation histories in Qianguo Irrigation Area,which is located in the downstream of the Second Songhua River basin,in the fall of 2008.Concentrations of Hg,Cd,Cu,Zn,Ni and Cr in rice flesh and hulls were determined and risks were assessed based on relative national standards of China.The concentrations of Hg in rice flesh increased with irrigation histories of the paddy fields while no significant relationships were found bet... |
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| Keywords: | the Second Songhua River Qianguo Irrigation Area rice grain heavy metal risk assessment |
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