南中国海表层海水重金属含量及其潜在生态风险分析

发布时间：2018-06-04 01:48

本文选题：南中国海 + 表层海水　；参考：《中国环境科学》2017年10期

【摘要】：为了解南中国海重金属含量现状及其潜在风险,采集南中国海16个采样点站位的表层海水样,分析重金属元素Cu、Pb、Zn、Cd含量及相关环境参数,并用Hakanson潜在生态危害指数法评价其生态风险.结果表明,Cu含量范围为0.012~0.127mg/L,Pb含量范围为0.051~1.113mg/L,Zn含量范围为0.045~0.186mg/L,Cd含量范围为0.047~0.324mg/L,重金属平均含量均超过我国海水水质三类标准.4种重金属间呈显著相关性,重金属与不同环境参数间也存在显著相关性,这可能与它们的污染来源相同有关.经重金属潜在生态风险指数分析,平均RI值为873.87,已具极强生态危害,其中Cd对生态危害贡献最大,海洋生态风险影响程度依次为CdPbCuZn.提示应重点加强海洋环境生态危害较大重金属的监测.
[Abstract]:In order to understand the present situation and potential risk of heavy metal content in the South China Sea, the surface seawater samples from 16 sampling sites in the South China Sea were collected, and the contents of heavy metal element, CuPbPbZN, CD and related environmental parameters were analyzed. The potential ecological hazard index of Hakanson was used to evaluate its ecological risk. The results showed that the range of Cu content was 0.012 ~ 0.127 mg 路L ~ (-1) mg / L ~ (-1) Pb content was 0.051 ~ 1.113 mg / L ~ (-1) Zn content was 0.045 ~ 0.186 mg / L ~ (-1) CD content range was 0.047 ~ 0.324 mg / L ~ (-1), and the average heavy metal content was higher than that of three kinds of water quality standards in China. There is also a significant correlation between heavy metals and different environmental parameters, which may be related to the same source of pollution. According to the analysis of potential ecological risk index of heavy metals, the average RI value is 873.87, which has already had extremely strong ecological harm, among which CD has the most contribution to ecological hazard, and the degree of marine ecological risk influence is CdPbCuZn. It is suggested that the monitoring of heavy metals in the marine environment should be strengthened.
【作者单位】：广州军区环境监测站;清华大学环境学院;
【基金】：国家自然科学基金资助项目(51290284)
【分类号】：X55;X826

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