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极端暴雨条件下广东北江重金属污染特征

易 雯 李 彤 付 青 李海啸 刘奕慧 吴志强 郑丙辉

易 雯, 李 彤, 付 青, 李海啸, 刘奕慧, 吴志强, 郑丙辉. 极端暴雨条件下广东北江重金属污染特征[J]. 环境科学研究, 2014, 27(12): 1458-1464.
引用本文: 易 雯, 李 彤, 付 青, 李海啸, 刘奕慧, 吴志强, 郑丙辉. 极端暴雨条件下广东北江重金属污染特征[J]. 环境科学研究, 2014, 27(12): 1458-1464.
YI Wen, LI Tong, FU Qin, LI Hai-xiao, LIU Yi-hui, WU Zhi-qiang, ZHENG Bing-hui. Characteristics of Heavy Metal Pollution in Beijiang River during Extreme Storm Runoff Event[J]. Research of Environmental Sciences, 2014, 27(12): 1458-1464.
Citation: YI Wen, LI Tong, FU Qin, LI Hai-xiao, LIU Yi-hui, WU Zhi-qiang, ZHENG Bing-hui. Characteristics of Heavy Metal Pollution in Beijiang River during Extreme Storm Runoff Event[J]. Research of Environmental Sciences, 2014, 27(12): 1458-1464.

极端暴雨条件下广东北江重金属污染特征

基金项目: 2011年中央财政重金属污染防治专项

Characteristics of Heavy Metal Pollution in Beijiang River during Extreme Storm Runoff Event

  • 摘要: 以2012年“6.25”暴雨径流过程为对象,研究广东省北江上游高桥断面在极端暴雨条件下水体理化性质与ρ(Pb)、ρ(Cu)、ρ(Zn)、ρ(Cd)(均为溶解态,下同)的变化过程;基于相关分析法,分析北江水质对水文过程的响应关系及各指标间的内联特点. 结果表明:暴雨径流期间,北江水质呈“大流量、高浓度”的特征. 暴雨径流发生前后4个典型阶段中,阶段Ⅰ(局部产流期)ρ(Cd)、ρ(Pb)仅为(0.48±0.09)和(1.91±0.29)μg/L,ρ(Cu)与ρ(Zn)基本未检出;阶段Ⅱ(以地表径流为主的全流域产流期)ρ(Cd)、ρ(Pb)、ρ(Cu)与ρ(Zn)均迅速上升,最高分别达1.80、12.34、6.18、52.57 μg/L;阶段Ⅲ(以浅层地下水径流为主的全流域产流期)重金属质量浓度整体较洪水期有所下降,但ρ(Pb)仍高于阶段Ⅰ正常水平,ρ(Zn)、ρ(Cu)和ρ(Cd)则低于阶段Ⅰ;阶段Ⅳ(深层地下水产流期)ρ(Cu)与ρ(Zn)已回落至未检出水平,ρ(Cd)持续下降,低于阶段Ⅲ和阶段Ⅰ,ρ(Pb)较阶段Ⅲ有所下降,但仍高于阶段Ⅰ. 暴雨径流期间,溶解态重金属质量浓度与流量及浊度间呈显著正相关(P<0.01),ρ(Zn)与ρ(Pb)、ρ(Cd)的相关系数均在0.85以上(P<0.01).

     

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  • 收稿日期:  2013-12-14
  • 修回日期:  2014-06-13
  • 刊出日期:  2014-12-25

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