广西近岸海域海水表层重金属的含量分布特征及污染评价

Distribution and Pollution Evaluation of Heavy Metals in the Surface Seawaters in Guangxi Coastal Area

根据2015年8月广西近岸海域环境调查资料,分析讨论了该海域表层海水中7种重金属的含量分布特征及污染评价。结果表明:广西近岸海域海水表层重金属Cu、Zn、Pb、Cd、Cr、Hg、As的平均浓度分别为5.06、12.5、0.70、0.12、2.38、0.048、0.61μg·L-1。Zn、Pb、Cd、Cr、Hg、As符合一类海水水质标准,Cu符合二类海水水质标准。各站位重金属综合污染指数在0.37~0.64范围区间,重金属综合污染程度低,总体属清洁水平。

Based on the environmental data of August of 2015 in Guangxi inshore, distribution characteristics and Pollution Evaluation of 7 heavy metals were investigated. The results showed that the average concentration of Cu、Zn、Pb、Cd、Cr、Hg、As in the Surface Seawaters in Guangxi inshore was5. 06、12. 5、0. 70、0. 12、2. 38、0. 048 and 0. 61 μg·L-1. Zn、Pb、Cd、Cr、Hg and as were up to the first class of marine water quality standards,Cu met the second class standard of water quality. The heavy metal pollution index was in the0. 37-0. 64 spectrum and integrated pollution assessment of heavy metals were in line with clean level.