摘要
2007年6月(夏季)和2008年1月(冬季)分别对广东红海湾的汕尾港周边海域35个站位进行了表层海水的采样,在实验室内使用XGY-1011A型原子荧光光度计和HY-1F型多功能极谱仪获得了海水中重金属Hg、Cu、Pb、Zn、Cd的含量,研究了其时空变化特征,并采用综合指数法(WQI)评价其污染程度.结果显示:Hg、Cu、Pb、Zn、Cd的含量范围分别为0.009～0.050、0.9～4.3、0.4～1.4、1.6～19.0、0.1～0.7μg/dm3,平均含量分别为0.025、2.4、0.8、9.4、0.2μg/dm3.该海域表层海水各重金属含量的平面分布总体上呈现以品清湖向汕尾港递减的变化趋势.各站位重金属元素的单项污染指数和综合污染指数(WQI)均小于1,海水受重金属的污染程度较轻微,符合国家二类海水水质标准值的要求.2008年1月(冬季)重金属综合污染指数的平均值(0.17)略大于2007年6月(夏季)的平均值(0.14),海水中重金属污染程度略有加重的趋势.采用多元线性回归方法分析重金属元素含量与环境要素测值的相关程度,相关系数按从大到小的排列顺序大致为:Zn>Cd>Cu>Hg>Pb.
Abstract：The surface seawater samples from 35 monitoring dong Province had been collected continuously in June 2007 stations around Shanwei Port in Honghai Bay of Guang and January 2008. Using atomic fluorescence photometer （ XGY1011 A） and multifunctional polarograph （ HY1 F）, the contents and distribution of heavy metals （ Hg, Cu, Pb ,Zn and Cd） in surface seawater were studied. The pollution level was evaluated with water quality index（WQI） model. The result showed that the contents of Hg, Cu, Pb, Zn and Cd in surface seawater ranged 0. 009 - 0.050, 0.9 - 4.3,0.4 - 1.4,1.6 - 19.0,0.1- 0.7 II,g/dm3, and averaged 0.025 ,2.4 ,0. 8 ,9.4, 0.2 μg/dm^3, respectively. The contents diminished from Pinqinghu Bay towards Shanwei Port. Both the single pollution index of heavy metals（C）） and the comprehensive pollution index（WQI） at all stations were less than 1. The pollution level of heavy metal in surface seawater was low and under the secondclass seawater quality standard. The WQ1 value （ averaged 0.17 ） was slightly higher in January 2008 than June 2007 （averaged 0. 14）, showing a trend of increment. Multivariate linear regression and multiple ments and environmental factors （ pH, S, CcoD ） was lined in orders of Cd 〉 Zn 〉 Cu 〉 Hg 〉 Pb.
出处
《台湾海峡》
CAS
CSCD
2012年第1期20-26,共7页
Journal of Oceanography In Taiwan Strait
关键词
海洋化学
重金属
污染评价
海水
环境要素
红海湾
marine chemistry
heavy metal
pollution evaluation
seawater
environmental factor
Honghai Bay
