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茅尾海沉积物重金属空间分布特征与生态风险

吴文成 任露陆 蔡信德 汪 涛

吴文成, 任露陆, 蔡信德, 汪 涛. 茅尾海沉积物重金属空间分布特征与生态风险[J]. 环境科学研究, 2014, 27(2): 147-156.
引用本文: 吴文成, 任露陆, 蔡信德, 汪 涛. 茅尾海沉积物重金属空间分布特征与生态风险[J]. 环境科学研究, 2014, 27(2): 147-156.
WU Wen-cheng, REN Lu-lu, CAI Xin-de, WANG Tao. Spatial Pattern and Ecological Risk of Heavy Metals in Sediments from Maowei Sea, Southern China[J]. Research of Environmental Sciences, 2014, 27(2): 147-156.
Citation: WU Wen-cheng, REN Lu-lu, CAI Xin-de, WANG Tao. Spatial Pattern and Ecological Risk of Heavy Metals in Sediments from Maowei Sea, Southern China[J]. Research of Environmental Sciences, 2014, 27(2): 147-156.

茅尾海沉积物重金属空间分布特征与生态风险

基金项目: 中央级公益性科研院所基本科研业务费专项(zx_200809_17);国家环境保护公益性科研专项(201109020)

Spatial Pattern and Ecological Risk of Heavy Metals in Sediments from Maowei Sea, Southern China

  • 摘要: 于2010年1月在茅尾海采集了7个沉积物样品,分析了不同深度沉积物的基本理化性质及w(As)、w(Cd)、w(Cu)、w(Fe)、w(Hg)、w(Mn)、w(Ni)、w(Pb)和w(Zn),并采用潜在生态危害指数法进行了潜在生态风险分析. 结果表明:这些元素的质量分数空间分布差异显著,总体上呈湾内大于湾外,其中w(Cd)和w(Hg)平均值分别为1.1、0.3mg/kg,污染最为严重并有加重的趋势;Cd污染可能与周边农田磷肥使用及磷矿开采有关,而Hg污染可能主要是大量使用化石燃料所致. 重金属(除As外)质量分数与w(OM)、w(Fe)和w(TN)密切相关,其中w(Cd)与w(TP)密切相关,说明生物和化学过程都显著影响这些元素的空间分布. w(Cu)、w(Hg)、w(Ni)、w(Pb)和w(Zn)之间呈极显著正相关(P<0.01),说明这几种重金属可能具有同源性;而沉积物中w(Cd)与w(Zn)、w(Pb)、w(Ni)和w(Cu)均呈显著负相关(P<0.05),暗示Cd的来源及生物地球化学过程与其他元素不同. 该海域重金属潜在生态危害指数依次为Cd>Hg>Pb>Zn>Cu>As,其中Cd与Hg属于中等生态危害;靠近茅岭江汇入区的采样点重金属潜在生态危害指数较高,属于中等生态危害,其余采样点的综合污染也已接近中等生态危害水平.

     

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出版历程
  • 收稿日期:  2013-08-07
  • 修回日期:  2013-10-12
  • 刊出日期:  2014-02-25

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