厦门西港重点排污口区水体中重金属的分布

DISTRIBUTION OF HEAVY METALS IN MARINE WATERBODIES NEAR THE MAJOR DRAINAGE OUTFALL IN XIAMEN WESTERN HARBOUR

根据1995年8月在厦门西港重点排污口区的调查资料,分析了调查海区水体中重金属的分布。调查结果表明Cu、Pb、Zn、Cd平均含量和标准偏差分别为Cu 6.56±11.5μg/dm^3;Pb-1.87±0.24μg/dm^3;Zn-3.43±1.76μg/dm^3;Cd 0.082±0.064μg/dm^3。分布特点以排污口附近4号站最高值为中心,向海方向单调快速降低。相关分析表明Cu、Cd主要来自筼筜湖污水,Pb、Zn部分来自污水;重金属对西海域水质影响集中在排污口附近的局部区域。Cu、Pb、Zn、Cd含量与1982年测值相比,Cu有大幅度增加,Pb、Zn、Cd均减少。

The studies and monitoring of the contents of Cu, Pb, Zn and Cd in marine wa lerbodies near the major drainage outfall in Xiamen Western Harbour were carried out. The re suits show that the average content and standard deviation of Cu, Pb, Zn and Cd are 6. 5 ±11.5μg/dm3,1.89±0.29μg/dm3, 3.43±1. 76μg/dm3 and 0. 082±0. 064μg/dm3 respectively. The characteristics of distribution is that the levels of heavy metals at Station 4 are maximum and then decrease rapidly outward, The correlation analysis indicate that Cu and Cd mainly come from the waste in Yundang Lake while Ph and Zn partly come from it. However,the effect of heavy metals on water quality of the Western Harbour waters is concentrated on the partial area near the outfall. Comparing with the figures measured in 1982, the content of Cu increases by a wide margin, whereas those of Pb. Zn and Cd decrease.