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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。
The ecological risk assessment of seven heavy metals (Cr, Mn, Ni, Cu, Zn, As, Pb) in core sediments of HZ02 in the tidal flat of the Haizhou Bay was carried out by using multiple evaluation methods such as enrichment coefficient and multivariate analysis And metal source identification. The results showed that the average concentrations of heavy metals in the sediments of the tidal flat in the Haizhou Bay were Cr (92.56 × 10-6), Mn (1492.02 × 10-6), Ni (48.01 × 10-6) and Cu (40.24 × 10-6) 6>, Zn (116.23 × 10-6), As (17.98 × 10-6) and Pb (44.98 × 10-6), the order of decreasing average concentration is Mn> Zn> Cr> Ni> Cu > Pb> As. Seven heavy metal concentrations began to rise gradually after 1980, with a low peak value from 1985 to 1990 and a rapid upward trend after 1990. The seven heavy metals in the sediments of Haizhou Bay show slight to moderate pollution in the five assessment methods. Multivariate analysis showed that there are three types of heavy metals: the first is heavy metals Cr, Ni, Cu and Zn, which may come from industrial and urban pollution, the second is heavy metals Mn and As, probably from agricultural pollution, the third is Pb, probably from harbor traffic.