环渤海湾诸河口潜在生态风险评价

Evaluation on the Potential Ecological Risk for the River Mouths around Bohai Bay

摘要: 简要介绍了Hak■nson的生态风险指数法,并用该法对环渤海湾诸河口采集的19处底泥样品分析了汞、砷、铜、锌和铅对水域的污染程度及其对水域造成的潜在生态风险影响.结果表明,除海河口污染程度和潜在生态风险略高外,环渤海湾其他河口重金属及砷污染程度及其对水域造成的潜在生态风险较低.从环渤海湾诸河口总的污染程度看,各污染物对生态风险影响程度从大到小的顺序为:Hg＞As＞Cu＞Pb＞Zn.

Abstract: The Hak■nson’s Ecological Risk Index Method is briefly introduced and applied to assess the potential ecological risk of the river mouths around Bohai Bay.The concentrations of mercury,copper,zinc,lead and arsenic in 19 sediment samples collected from river mouths are analyzed.It is concluded that the degree of contamination and the potential ecological risk of the river mouths are low except that those of Haihe River mouth are moderate.The pollutants in the order of impacting extent of ecological risk are:Hg>As>Cu>Pb>Zn.