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基于三角模糊数的清河沉积物重金属评价

赵艳民 张 雷 秦延文 马迎群 刘志超 王洪盼

赵艳民, 张 雷, 秦延文, 马迎群, 刘志超, 王洪盼. 基于三角模糊数的清河沉积物重金属评价[J]. 环境科学研究, 2015, 28(10): 1538-1544.
引用本文: 赵艳民, 张 雷, 秦延文, 马迎群, 刘志超, 王洪盼. 基于三角模糊数的清河沉积物重金属评价[J]. 环境科学研究, 2015, 28(10): 1538-1544.
ZHAO Yanmin, ZHANG Lei, QIN Yanwen, MA Yingqun, LIU Zhichao, WANG Hongpan. Assessment of Heavy Metals in Sediments of Qinghe River Based on Triangular Fuzzy Numbers[J]. Research of Environmental Sciences, 2015, 28(10): 1538-1544.
Citation: ZHAO Yanmin, ZHANG Lei, QIN Yanwen, MA Yingqun, LIU Zhichao, WANG Hongpan. Assessment of Heavy Metals in Sediments of Qinghe River Based on Triangular Fuzzy Numbers[J]. Research of Environmental Sciences, 2015, 28(10): 1538-1544.

基于三角模糊数的清河沉积物重金属评价

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07503-002)

Assessment of Heavy Metals in Sediments of Qinghe River Based on Triangular Fuzzy Numbers

  • 摘要: 为全面了解北京清河沉积物重金属的空间分布及污染水平,在清河采集8个沉积物样品,测定w(As)、w(Cd)、w(Cr)、w(Cu)、w(Pb)、w(Zn),并利用基于三角模糊数的地累积指数模糊评价模型对北京清河沉积物的重金属污染进行评价. 结果表明:北京清河沉积物中w(As)、w(Cd)、w(Cr)、w(Cu)、w(Pb)、w(Zn)的平均值分别为43.18、1.20、70.70、49.62、38.59和297.36 mg/kg,不同重金属在各采样点间的分布差异较大,6种重金属的污染程度表现为As>Cd>Zn>Cu>Pb>Cr. 对于大部分采样点,基于三角模糊数的不确定性评价结果与常规评价结果保持一致,均显示清河沉积物重金属污染程度较低. 然而,QH6采样点(立水桥)As常规评价结果为偏中度污染,不确定性评价结果为中度污染;QH5采样点(清河大桥)Cd和Zn在常规评价结果为轻度污染,而不确定性评价结果为偏中度污染;QH8采样点(入温榆河口)Cd和Zn常规评价结果分别为轻度污染和偏中度污染,不确定性评价的结果则显示为偏中度和中度污染. 不确定性评价方法采用重金属质量分数区间值,而常规评价则采用重金属质量分数的单一值;不确定性评价通过计算隶属度确定污染等级,在接近分级界限时,不确定性评价和常规评价结果之间出现差异.

     

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  • 收稿日期:  2014-12-22
  • 修回日期:  2015-07-11
  • 刊出日期:  2015-10-25

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