| 东山湾表层沉积物5种重金属元素含量分布及其与主要环境因子的关系 |
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| 引用本文： | 郑盛华,杨妙峰,席英玉,陈宇锋,蔡建堤,陈财珍,钟硕良.东山湾表层沉积物5种重金属元素含量分布及其与主要环境因子的关系[J].台湾海峡,2014(2):251-257. |
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| 作者姓名： | 郑盛华 杨妙峰 席英玉 陈宇锋 蔡建堤 陈财珍 钟硕良 |
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| 作者单位： | 福建省水产研究所,福建厦门361013 |
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| 基金项目： | 国家海洋局海洋公益性行业科研专项资助项目（201005012,201305043） |
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| 摘 要： | 根据2011年8月福建东山湾12个站位表层沉积物中5种重金属含量调查,探讨了它们的分布趋势、相互关系、影响因素,并运用潜在生态风险指数法对重金属污染进行风险评价.结果表明,该海域表层沉积物中重金属Cu含量变化范围在5.53～22.40 mg/kg之间,平均值为15.10 mg/kg；Pb含量变化范围在28.9～42.6 mg/kg之间,平均值为35.0 mg/kg；Zn含量变化范围在34.8～133.9 mg/kg之间,平均值为95.9 mg/kg；Cd含量变化范围在0.031～0.078 mg/kg之间,平均值为0.059 mg/kg；Cr含量变化范围在19.2～91.8 mg/kg之间,平均值为62.5 mg/kg.重金属含量的分布呈现湾顶（3、11号站）高、湾外（7号站）低的格局；沉积物中有机质对重金属含量的分布起着重要作用；重金属Cu、Zn和Cr的含量随着沉积物粗颗粒组分（63～2 000μm）含量的增大而降低,成负相关关系（p〈0.05）；Cr的含量随着粘土组分（〈1μm）含量的增大而增大,成正相关关系（p〈0.05）.除了湾顶3号站Cr（含量为91.8 mg/kg）以外,其他重金属元素含量均符合《海洋沉积物质量》一类标准；各元素潜在生态危害系数Ei r大小顺序为Cd〉Pb〉Cu〉Cr〉Zn,所有站位重金属潜在生态危害指数RI均远小于90,属低度生态风险,表明东山湾沉积环境基本良好.
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| 关 键 词： | 海洋化学 重金属 沉积物 环境因子 风险评价 东山湾 |
Distribution of 5 heavy metals with relations to environmental factors in surface sediments of Dongshan Bay |
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| ZHENG Sheng-hua,YANG Miao-feng,XI Ying-yu,CHEN Yu-feng,CAI Jian-di,CHEN Cai-zhen,ZHONG Shuo-liang.Distribution of 5 heavy metals with relations to environmental factors in surface sediments of Dongshan Bay[J].Journal of Oceanography In Taiwan Strait,2014(2):251-257. |
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| Authors: | ZHENG Sheng-hua YANG Miao-feng XI Ying-yu CHEN Yu-feng CAI Jian-di CHEN Cai-zhen ZHONG Shuo-liang |
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| Institution: | ( Fisheries Research Institute of Fujian, Xiamen 361013, China) |
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| Abstract: | Based on the investigation on 5 heavy metals at 12 sites in Dongshan Bay in August 2011,the distribution and the influencing factors of heavy metals with relations of environment in the surface sediments were discussed and the risk by heavy metal pollution was evaluated with the standard of ecological risk coefficient（Ei r）. The results showed that copper（Cu）content were measured between 5. 53 and 22. 40 mg / kg with average 15. 10 mg / kg,lead（Pb）content between 28. 9 and 42. 6 mg/kg with average 35. 0 mg/kg,zinc（Zn）content between 34. 8 and 133. 9 mg / kg with average 95. 9 mg / kg,cadmium（Cd）content between 0. 031 and 0. 078 mg / kg with average 0. 059 mg / kg, chromium（Cr）content between 19. 2 and 91. 8 mg / kg with average 62. 5 mg / kg. Higher concentrations were found in the top of Dongshan Bay,and lower values were found outside the bay. Organic matters in the sediments played an important role in the distribution of heavy metals. Heavy metals（Cu,Zn,Cr）presented negative correlation with the sand（%）of big size（63 ～ 2 000 μm）,while Cr showed positive correlation with clay（%）of fine particle（ 1 μm）. Except for Cr（91. 8 mg/kg）at the site of bay top,all heavy metals were fit in class I of the national marine sediment standard. Ecological risk coefficient（Ei r）of heavy metals were in sequences of Cd Pb Cu Cr Zn andthe Risk Index（RI）was lower than 90 at all sites sampled. It suggested that the sediments environment of Dongshan bay was in a good quality of low ecological risk. |
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| Keywords: | marine chemistry heavy metal sediment environmental factor risk evaluation Dongshan Bay |
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