文献类型：期刊文献

中文题名：博贺湾表层沉积物重金属来源及风险评价

英文题名：Sources and Risk Assessment of Heavy Metals in Sediment in Bohe Bay

作者：曾珍[1];陈春亮[1];柯盛[1];冯妍[1];赵子科[1];谢群[1,2,3]

机构：[1]广东海洋大学分析测试中心,广东湛江524088;[2]中国科学院大学,北京100049;[3]中国科学院南海海洋研究所中国科学院热带海洋生物资源与生态重点实验室,广东广州510301

年份：2018

卷号：38

期号：2

起止页码：47

中文期刊名：广东海洋大学学报

外文期刊名：Journal of Guangdong Ocean University

收录：CSTPCD

基金：国家海洋局海洋公益性行业科研专项资助项目(201305038-6;201505027-1);广东海洋大学创新强校工程科研项目(GDOU2016050212)

语种：中文

中文关键词：重金属;沉积物;污染来源;生态风险评估;博贺湾

外文关键词：heavy metals; sediments; pollution sources; ecological risk assessment; Bohe Bay

中文摘要：【目的】探究博贺湾海域表层沉积物重金属的污染特征和来源。【方法】基于2016年和2014年博贺湾海域表层沉积物Cu、Pb、Zn、Cd、Cr、Hg、As重金属调查结果,应用单因子污染指数法和Hakanson潜在生态风险指数法评估其生态风险,同时结合同步调查得到的总有机碳(TOC)参数,应用相关性分析和主成分分析方法,分析调查海域重金属的污染特征及来源。【结果】博贺湾海域表层沉积物重金属Zn、Cd、Pb、As、Hg含量均满足国家第一类海洋沉积物质量标准,95%站位的Cu、Cr满足国家第一类海洋沉积物质量标准,重金属污染程度由高到低依次为Cr>Pb>Hg>Cu>As>Zn>Cd,重金属元素潜在生态危害影响程度依次为Hg>Cd>As>Pb>Cu>Cr>Zn,TOC与重金属Hg含量成显著正相关,而与Cu、Zn、Cr无相关性。【结论】该海域Hg主要来源于有机质的降解,Cu、Zn、Cr具有相近来源,主要为人类工业生产与生活污染;Cd、Pb、As来源为人类工业生产与生活污染以及有机质的降解。调查海域综合潜在生态风险整体处于较低水平,重金属Hg为主要生态风险贡献因子。

外文摘要：【Objective】To explore the status of heavy metals pollution in surface sediment of the Bohe Bay of Guangdong province.【Methods】According to data of heavy metals （Cu,Pb,Zn,Cd,Cr,Hg,As） in surface sediment samples from the Bohe Bay of Guangdong province in 2014 and 2016, the ecological risk were assessed with the Hakanson＇s potential ecological risk index and Single factor pollution index, respectively. Together with the results of total organic carbon （TOC） in the same samples the distribution characteristics and sources of the selected heavy metals were discussed with an approach of multivariate statistical analysis. 【Results】The results showed that the contents of Pb,Zn,Cd,Hg and As in surface sediments were less than China＇s national first-class benchmark （CFCB） in marine sediment quality. The contents of Cu and Cr from 95% stations were less than CFCB. The contamination in the investigated areas was at a low level on the whole, with an order of the degree of contamination：Cr〉Pb〉Hg〉Cu〉As〉Zn〉Cd. The potential ecological risks were also at low levels for these metals with a descending order Hg〉Cd〉As〉Pb〉Cu〉Cr〉Zn. The contents of the TOC were significantly positively correlated with that of Hg, but not positively correlated with Cu,Zn,Cr. 【Conclusion】Anthropogenic sewage effluent from industry and residents were the primary agents for Cu,Zn,Cr in the sediments, but organic degradation should have contributed to the most of Hg, and anthropogenic sewage effluent from industry and residents and organic degradation accounted for the most of Cd,Pb,As. The potential ecological risks in the investigated areas were at low levels, but Hg should be of some concern as it was the major contaminant among the metals.