海州湾岩芯沉积物重金属污染评价和来源分析

运用富集系数等多种评价方法和多变量分析方法对海州湾潮滩HZ02岩芯沉积物的7种重金属（Cr、Mn、Ni、Cu、Zn、As、Pb）进行了污染生态风险评估和金属来源识别。结果表明，海州湾潮滩岩芯沉积物重金属平均浓度分别为Cr（92.56×10-6）、Mn（1492.02×10-6）、Ni（48.01×10-6）、Cu（40.24×10-6）、Zn（116.23×10-6）、As（17.98×10-6）和Pb（44.98×10-6），其平均浓度由大到小的顺序为:Mn > Zn > Cr > Ni > Cu > Pb > As。7种重金属浓度在1980年后开始逐渐上升，1985~1990年为低峰值，1990年后呈快速上升趋势。海州湾潮滩沉积物7种重金属在5种评价方法评估中均表现为轻度至中度污染。多变量分析结果表明重金属分三类:第一类为重金属Cr、Ni、Cu和Zn，可能来自工业和城市污染的排放，第二类为重金属Mn和As，可能来自农业污染，第三类为Pb，可能来源于海港交通。

Pollution evaluation and source identification of heavy metals in sediments from core in Haizhou bay

The ecological pollution risk assessment and metal source identification of 7 heavy metals (Cr、Mn、Ni、Cu、Zn、As、Pb) from HZ02 core sediments in Haizhou bay have been respectively carried out by using multiple evaluation methods and multivariate analysis method.The result shows that the average concentration values of heavy metals are Cr (92.56×10-6), Mn (1492.02×10-6), Ni (48.01×10-6), Cu (40.24×10-6), Zn (116.23×10-6), As (17.98×10-6) and Pb (44.98×10-6).In descending order, the relative average concentrations of these heavy metals is Mn > Zn > Cr > Ni > Cu > Pb > As.The sediment of the core HZ02 recorded the environmental change in the last 100 years.The concentrations of 7 heavy metals increased gradually since 1980, while reached their low peak of values around 1985 to 1990, and increased rapidly after 1990.The assessment results of these 7 heavy metals from core sediments in Haizhou bay show that there are mild to moderate pollution existed by using 5 different assessment methods.The multivariate analysis results show that the heavy metals can be divided into three groups:the first group, such as Cr, Ni, Cu and Zn, is derived from industrial and urban pollution emissions; the second group is Mn and As, which may come from agricultural pollution; and the last group is Pb, which probably comes from harbor traffic.