The contents of Cu, Pb, Zn, Cd in the 40 surface sediments samplesfrom Tajiaozhou wetland of Minjiang estuary were determined. The results indicated that the contents of Cu, Pb, Zn, Cd ranged from 4.13 -42.62, 40.31 - 104.63, 50.36- 516.39, 0.14 - 1.39 mg . kg-1 , respectively. The order of average content was: Zn ＞ Pb ＞ Cu ＞ Cd. Compared with other estuary wetland of home and abroad, the average contents of Cu, Cd in Tajiaozhou wetland were relatively lower, but PB, Zn was higher.According to the index of geoaccumulation, the pollution of Tajiaozhou wetland mainly came from Cd and Zn. The order of polluting degree was Cd ＞ Zn ＞ PB ＞ Cu. The assessment result of the potential ecological risk showed that average Hakanson′s potential ecological risk index (RI) of this area was 315.7 ±156.4, which belongs to strong risk level. Analyzed from the samples, the potential ecological risk was mainly resulted from Cd and PB, Cu, Zn belongs to light potential ecological risk.%对闽江口塔礁洲湿地40个采样点的表层沉积物中的重金属含量进行测定.结果表明:Cu、Pb、Zn、Cd的含量分别为4.13-42.62、40.31-104.63、50.36-516.39、0.14-1.39mg·kg-1;各元素平均含量从大到小排序为Zn、Pb、Cu、Cd;对比国内外典型河口,塔礁洲湿地的Cu、Cd含量处于较低水平,但Pb、Zn的污染则较为严重;地累积指数法评价结果显示,塔礁洲主要受Cd和Zn的污染,不同重金属污染程度从大到小排序为Cd、Zn、Pb、Cu;潜在生态危害指数法评价结果显示,塔礁洲湿地的潜在生态危害指数(RI)均值为315.7±156.4,属于强的生态危害;塔礁洲湿地主要潜在生态危害重金属为Cd、Pb、Cu、Zn,均属于轻微的生态危害.
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