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基于统计分析的太湖流域某市农业活动区重金属污染特征及来源

杨彦 李良忠 于云江 李定龙 杨洁

杨彦, 李良忠, 于云江, 李定龙, 杨洁. 基于统计分析的太湖流域某市农业活动区重金属污染特征及来源[J]. 环境科学研究, 2012, 25(12): 1319-1327.
引用本文: 杨彦, 李良忠, 于云江, 李定龙, 杨洁. 基于统计分析的太湖流域某市农业活动区重金属污染特征及来源[J]. 环境科学研究, 2012, 25(12): 1319-1327.
YANG Yan, LI Liang-zhong, YU Yun-jiang, LI Ding-long, YANG Jie. Analysis of Heavy Metals Distribution Characteristics and Sources Based on Agricultural Region Statistics of Taihu Lake Basin[J]. Research of Environmental Sciences, 2012, 25(12): 1319-1327.
Citation: YANG Yan, LI Liang-zhong, YU Yun-jiang, LI Ding-long, YANG Jie. Analysis of Heavy Metals Distribution Characteristics and Sources Based on Agricultural Region Statistics of Taihu Lake Basin[J]. Research of Environmental Sciences, 2012, 25(12): 1319-1327.

基于统计分析的太湖流域某市农业活动区重金属污染特征及来源

基金项目: 国家环境保护公益性行业科研专项(201109009);国家重点基础研究发展(973)计划项目(2008CB418205)

Analysis of Heavy Metals Distribution Characteristics and Sources Based on Agricultural Region Statistics of Taihu Lake Basin

  • 摘要: 对太湖流域某市农业活动区具代表性的14个监测点的土壤(0~10、20~30和50~60 cm)进行采样分析,利用多元统计和地统计学方法,研究了该地区Cd、Pb、Cr和Mn等重金属的空间分布特征及其主要来源. 结果表明,各采样点和各层土壤之间重金属的含量变化较大,变异系数为39.05%~243.52%. 各层土壤中w(Cd)和w(Pb)以及底层土壤中w(Cr)均超过土壤背景值,尤其是w(Cd),表层、中层和底层分别为19.92、17.41和19.97 mg/kg,远高于背景值. 地统计学分析表明,各层土壤中w(Cd)、w(Pb)以及表层土壤中w(Cr)的高值区主要分布在研究区北部,而中层和底层土壤中w(Cr)的高值区主要分布在研究区南部. w(Mn)受自然因素的影响较大,分布较为均匀. 表层、中层和底层土壤中w(Cr)和w(Mn)的相关系数分别为0.715(P<0.01)、0.632(P<0.05)和0.602(P<0.05),w(Pb)与w(Cd)的相关系数分别为0.842(P<0.01)、0.590(P<0.05)和0.874(P<0.01). 主成分分析表明,研究区耕地土壤中w(Mn)主要受地球化学的影响,Cd、Pb和Cr的污染主要来源于工厂所排放的废气、废水,机动车尾气,以及农业活动施入的化肥、农药.

     

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  • 修回日期:  2012-09-17
  • 刊出日期:  2012-12-25

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