摘要
对海南省陵水黎族自治县新村港内表层沉积物中重金属的含量进行测定,探讨其分布特征及相关性,并利用潜在生态危害指数法对重金属的生态危害程度进行评价。结果表明,新村港表层沉积物中的重金属Zn含量为（0.23-144.73）mg/kg,Cu含量为（1.44-103.12）mg/kg,Pb的含量为（6.51-29.74）mg/kg,Cr的含量为（0.15-35.04）mg/kg,Cd的含量为（0.001-0.296）mg/kg,As的含量为（0.17-0.99）mg/kg,Hg的含量为（0.01-0.32）mg/kg;相关性分析显示,Cu、Cr、Pb及Zn具有相同污染源,Cd、Hg、As及Zn具有相同污染源;重金属污染程度为轻微生态危害,占总站位的16.32%;重金属中等生态危害污染程度,占总站位的38.78%,强生态危害,占总站位的42.86%;很强生态危害,占总站位的2.04%,RI较高的站位基本位于新村港口门附近;7种重金属的潜在生态风险大小依次为：Hg〉Cd〉Cu〉Pb〉Zn〉As〉Cr。
For determined of the contents, the distribution and the correlation of the heavy metals in the surface sediments of Xincun lagoon in Lingshui Li autonomous County, Hainan Province were investigated, and were evaluated the ecological risks of heavy metals by the potential ecological risk index method. The results showed that, the heavy metals in surface sediments of Xincun lagoon, the contents of Zn was （0. 23 - 144.73） rag/ kg, Cu was （1.44 - 103.12） mg/kg, Pb was （6.51 - 29.74） mg/kg, Cr was （0.15 - 35.04） mg/kg, Cd was （0. 001 - 0. 296） mg/kg, As was （0. 17 - 0.99）mg/kg, Hg was （0.01 - 0.32） mg/kg; Correlation a- nalysis of the heavy metals, Cu, Cr, Pb, and Zn , have the same sources of pollutions, Cd, Hg, As, and Zn have the same sources of pollutions; the slight ecological risk in the heavy metals pollution, account for 16.32% in the total station, the medium ecological risk, account for 38. 78%, strong ecological risk, account for 42.86%, very strong ecological risk, account for 2.04%. And the Stations who with high RI basic in the entrances of Xin, Cun longe. A descending order of the the potential ecological risk about the 7 kinds of the heavy metals was Hg〉Cd〉Cu〉Pb〉Zn〉As〉Cr.
出处
《海洋湖沼通报》
CSCD
北大核心
2014年第4期144-152,共9页
Transactions of Oceanology and Limnology
基金
国家海洋公益性行业科研专项(No.201005012)
东南沿海半封闭海湾生态系统对人类活动干扰的响应评价
生态重构技术和示范项目资助
关键词
新村港
相关性
重金属
沉积物
生态危害评价
Xincun lagoon
correlation of
heavy metals
sediments
Ecological risk assessment
