福清湾表层沉积物重金属分布及生态风险评价

福建水产 ›› 2012, Vol. 34 ›› Issue (3): 214-219.

福清湾表层沉积物重金属分布及生态风险评价

林祥

福建省水产设计院

收稿日期:2012-03-19 修回日期:2012-04-05 出版日期:2012-06-25 发布日期:2012-06-21
通讯作者: 林祥

Distribution and ecological risk assessment of heavy metals in surface sediments of Fuqing Bay

Xiang LIN

Received:2012-03-19 Revised:2012-04-05 Online:2012-06-25 Published:2012-06-21
Contact: Xiang LIN

摘要/Abstract

摘要： 为了解福清湾表层沉积物重金属的污染现状及其潜在生态危害程度，以及重金属和有机质含量的相关性，于2009年6月和8月对福清湾表层沉积物重金属和有机质含量展开调查，并利用单因子指数法和Hakanson潜在生态风险指数法对其进行综合评价。结果表明，福清湾表层沉积物Cu、Pb、Cd、Hg、As和有机质平均含量分别为17.4×10-6、31.7×10-6、0.058×10-6、0.079×10-6、8.90×10-6和1.31%，均符合一类海洋沉积物质量标准，质量状况良好。各重金属元素之间呈正相关，与有机质呈正相关关系尤为明显。沉积物重金属单因子指数依次为Pb(1.27)＞As(0.59)＞Cu(0.58)＞Hg(0.40)＞Cd(0.12)，重金属综合污染指数为2.96，为低污染水平；单项重金属潜在生态风险参数依次为Hg(15.8) ＞Pb(6.35)＞As(5.94)＞Cd(3.48)＞Cu(2.91)，潜在生态风险指数（RI）为34.5，属于低潜在生态风险。

关键词: 福清湾, 重金属, 有机质, 潜在风险评价, 表层沉积物, Fuqing Bay, heavy metals, organic matter, potential ecological risk, surface sediments

Abstract: In order to understand the Fuqing Bay surface sediments, heavy metals pollution status and its potential ecological hazards, as well as heavy metals and organic matter content in the correlation, from June to August in 2009 we investigated Fuqing Bay surface sediments, heavy metals and organic matter content, and used single factor index method, and Hakanson potential ecological risk index to evaluate it comprehensively. The results show that, Fuqing Bay surface sediments of Cu, Pb, ,Cd, Hg, As and organic matters, the average content are 17.4 × 10-6,31.7 × 10-6,0.058 × 10-6,0.079 × 10-6,8.90 × 10 -6 and 1.31%, which are consistent with a type of marine sediment quality standards that means it has good quality. Apositive correlation of heavy metals, especially a positive correlation with organic matter is obvious. Heavymetal single factor index in decreasing order is: Pb (1.27) > As (0.59)> Cu (0.58)> Hg (0.40)> Cd (0.12), heavy metal pollution index was 2.96 for the low-pollution level; individual potential ecological risk of heavy metals parameters were Hg (15.8)> Pb (6.35)> As (5.94)> Cd (3.48)> Cu (2.91), the potential ecological risk index (RI) was 34.5. which indicated that Fuqing Bay existed a low potential ecological risk.

中图分类号:

X821

林祥. 福清湾表层沉积物重金属分布及生态风险评价[J]. 福建水产, 2012, 34(3): 214-219.

Xiang LIN. Distribution and ecological risk assessment of heavy metals in surface sediments of Fuqing Bay[J]. JOURNAL OF FUJIAN FISHERIES, 2012, 34(3): 214-219.

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