| 摘要: |
| 2010 年6 月对连云港市对虾养殖区的沉积物环境状况进行调查, 分析了对虾池养殖区表层沉积物中重金属的含量及分布, 并采用海洋沉积物质量国家标准和地积累指数法对该养殖区沉积物重金属污染进行评价。结果表明: (1) Cu、Zn、Pb、Cd、Hg、Cr、As的平均浓度分别为22.31、283.9、64.86、0.58、0.0056、89.23、35.58mg/kg, 通过计算单项污染指数表明所有元素的污染指数均在0—1之间, 属于非污染, 表明虾池沉积物属于清洁土壤。(2) 利用地积累指数(Igeo)法对所得到的调查结果进行了评价, 发现各采样点沉积物呈现出轻洁至中等的污染程度, 参与评价的6种重金属的污染程度依次为As> Zn> Pb、Cd> Cr> Cu。进一步的生态风险评价结果表明, 所有站位沉积物Cu和Cd(除站位5)的含量皆低于效应浓度低值, 说明Cu和Cd很少产生不利的生态效应; 全部站位的Zn、Pb、As含量和8个站位的Cr含量均在效应浓度低值和效应浓度中值之间, 表明这四种金属偶尔产生不利的生态效应。 |
| 关键词: 对虾养殖区 沉积物 重金属 污染 |
| DOI：10.11693/hyhz20120910001 |
| 分类号: |
| 基金项目:江苏省高校自然科学研究面上项目, 11KJB170001 号; 江苏政府留学奖学金; 江苏高校优势学科建设工程资助项目; 国家自然科学基金项目, 41306114 号。 |
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| ASSESSMENT ON DISTRIBUTION AND POLLUTION OF HEAVY METALS IN SHRIMP CULTURE AREAS OF LIANYUNGANG |
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LI Yu, FENG Zhi-Hua
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Huaihai Institute of Technology, Jiangsu Province
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| Abstract: |
| Based on data obtained in an environmental survey from shrimp-culture sites in Lianyungang, Jiangsu, East China in June 2010. The content and distribution of heavy metals in surface sediments were analyzed. Against China's national standard of marine sediment quality, indices of geo-accumulation were used to assess the degree of heavy-metal pollution. Results show that the average metal concentrations in sediment for Cu, Zn, Pb, Cd, Hg, Cr, and As were 22.31, 283.9, 64.86, 0.58, 0.0056, 89.23, and 35.58mg/kg, respectively, satisfying the applicable national standard in terms of single-species heavy metal contamination. However, environmental quality assessment with geo-accumulation index showed that the pollution degree was from slight to medium in a descending order of As > Zn> Pb, Cd > Cr > Cu, indicating that they may occasionally cause adverse ecological effects. |
| Key words: shrimp culture areas sediments heavy metals pollution |
