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温榆河昌平段沉积物重金属影响因素分析及污染评价

王志英 刘 云 王建立 赵建庄

王志英, 刘 云, 王建立, 赵建庄. 温榆河昌平段沉积物重金属影响因素分析及污染评价[J]. 环境科学研究, 2013, 26(8): 838-843.
引用本文: 王志英, 刘 云, 王建立, 赵建庄. 温榆河昌平段沉积物重金属影响因素分析及污染评价[J]. 环境科学研究, 2013, 26(8): 838-843.
WANG Zhi-ying, LIU Yun, WANG Jian-li, ZHAO Jian-zhuang. Factor Analysis of Heavy Metals in the Sediment in Changping Section of the Wenyu River and Their Pollution Assessment[J]. Research of Environmental Sciences, 2013, 26(8): 838-843.
Citation: WANG Zhi-ying, LIU Yun, WANG Jian-li, ZHAO Jian-zhuang. Factor Analysis of Heavy Metals in the Sediment in Changping Section of the Wenyu River and Their Pollution Assessment[J]. Research of Environmental Sciences, 2013, 26(8): 838-843.

温榆河昌平段沉积物重金属影响因素分析及污染评价

基金项目: 国家自然科学基金项目(40871232,40501029);2011年度北京市属高等教育学校人才强教深化计划“青年骨干教师项目”(PHR201108286)

Factor Analysis of Heavy Metals in the Sediment in Changping Section of the Wenyu River and Their Pollution Assessment

  • 摘要: 温榆河是北京市重要的防洪排涝、拦污河道,每年接纳大量污水,面临严重的水环境问题. 为了解温榆河昌平段表层沉积物重金属含量、影响因素及污染状况,在温榆河昌平段采集沉积物样品28个,测定pH、w(OM)(OM有机质)、w(TN)、w(TP)、w(TK)等沉积物理化性状及w(Cu)、w(Zn)、w(Pb)和w(Cr). 通过相关性分析和因子分析,研究沉积物中pH、w(OM)、w(TN)、w(TP)、w(TK)与4种重金属质量分数的相关关系,并运用地累积指数法和潜在生态危害指数法对重金属污染状况进行评价. 结果表明:沉积物中w(Cu)、w(Zn)、w(Pb)和w(Cr)平均值分别为19.35、89.90、25.80、53.74mg/kg,变异系数分别为29.76%、43.39%、37.54%、20.90%,其中w(Zn)的空间变异程度最大. 沉积物中w(OM)与w(Cu)和w(Zn)的R(相关系数)分别为0.515(P<0.01)、0.599(P<0.01),w(TN)与w(Cu)、w(Zn)、w(Pb)的R分别为0.463(P<0.05)、0.713(P<0.01)和0.654(P<0.01).因子分析也显示,w(OM)、w(TN)、w(Cu)、w(Zn)和w(Pb)在第1因子上具有较高的载荷系数. 地累积指数评价结果表明,表层沉积物重金属污染程度顺序为Cr>Zn>Pb>Cu,Cr为轻度污染,Zn、Pb、Cu未达到污染. 潜在生态风险程度分析表明,各重金属潜在生态风险程度及综合生态风险程度均为轻微.

     

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出版历程
  • 收稿日期:  2013-01-16
  • 修回日期:  2013-05-08
  • 刊出日期:  2013-08-25

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