张颖1周军,张宝杰,高凤杰,马彪.松花江表层沉积物有毒重金属污染评价[J].湖南大学学报:自然科学版,2015,42(6):113~118
松花江表层沉积物有毒重金属污染评价
Pollution Evaluation of Toxic Heavy Metals in the Sediments of Songhua River
  
DOI:
中文关键词:  有毒重金属  Pearson相关系数  主成分分析  潜在生态风险指数  松花江
英文关键词:toxic heavy metal  Pearson correlation coefficient  principal component analysis (PCA)  potential ecological risk index  Songhua River
基金项目:
作者单位
张颖1周军,张宝杰,高凤杰,马彪 (1.东北农业大学 资源与环境学院黑龙江 哈尔滨150030 2.黑龙江省环境科学研究院黑龙江 哈尔滨150056) 
摘要点击次数: 483
全文下载次数: 0
中文摘要:
      为反映中俄界河黑龙江第一大支流松花江的重金属污染状况,采用潜在生态风险指数及主成分分析对松花江全江段表层沉积物Hg,Pb,Cd,Cr和As 5种有毒重金属的污染特征、来源解析及潜在生态风险危害进行深入探讨.研究表明:松花江表层沉积物中,重金属含量平均值由大到小顺序为wCr>wPb>wAs> wCd>wHg;变异系数CV表明Hg和As的空间分布离散性较大,而Cd和Pb则相对较均匀;采用主成分分析法(PCA)对重金属污染物的来源进行了推断;Hg和Cd的单一重金属潜在生态风险因子Eri值较高,RI指数表明整体上松花江重金属污染处于低度风险水平,只有1#,2#,7#和10# 4个断面处于中度风险水平.
英文摘要:
      This paper discussed the pollution characteristics and their sources of Hg, Cd, Cr, As and Pb in the bottom sediments of Songhua River in the Hakanson's Potential Ecological Risk Index Method (RI) and Principal Component Analysis (PCA) to reveal the metal pollution status of the whole Songhua River, which is the biggest tributary of the Heilongjiang River at the China-Russian border. The results showed that: the concentration order from high to low by average was wCr>wPb>wAs>wCd>wHg; the coefficient of variation (CV) revealed that the spatial distribution of Hg and As was discrete and Cd and Pb were homogeneous. In the method of PCA, the main sources of heavy metal pollutants were inferred. The Eri of Hg and Cd was higher,and the RI analysis uncovered that the potential ecological risk declined compared with the past, and just the 4 sections of 1#,2#, 7# and 10# were in moderate level only.
查看全文  查看/发表评论  下载PDF阅读器
关闭