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应用生态学报 ›› 2016, Vol. 27 ›› Issue (9): 2884-2890.doi: 10.13287/j.1001-9332.201609.005

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鸭绿江口湿地滩涂表层沉积物重金属空间分布特征及生态风险评价

张春鹏, 李富祥*   

  1. 辽东学院城市建设学院, 辽宁丹东 118003
  • 收稿日期:2016-01-11 发布日期:2016-09-18
  • 通讯作者: * E-mail: ldxylfx@163.com
  • 作者简介:张春鹏,男,1977年生,硕士,讲师. 主要从事河口海岸生态系统与GIS应用研究. E-mail: zcp27@163.com
  • 基金资助:
    辽宁省科技厅博士科研启动项目(201501133)、辽东学院博士科研启动项目和辽东学院青年基金项目(2014Q01,2015QN001)资助

Spatial distribution and potential ecological risk assessment of heavy metals in sediments of Yalu River estuary wetland mudflat.

ZHANG Chun-peng, LI Fu-xiang*   

  1. Urban Construction College, Eastern Liaoning University, Dandong 118003, Liaoning, China
  • Received:2016-01-11 Published:2016-09-18
  • Contact: * E-mail: ldxylfx@163.com
  • Supported by:
    This work was supported by the Startup Project of Doctor Scientific Research of Science and Technology Department of Liaoning Province (201501133), the Startup Project of Doctor Scientific Research of Eastern Liaoning University and the Youth Fund of Eastern Liaoning University (2014Q01, 2015QN001)

摘要: 利用GIS软件空间内插值法分析鸭绿江河口近海湿地滩涂表层沉积物重金属的空间分布特征,并采用环境风险指数法和潜在生态危害指数法进行重金属元素的生态风险评价.结果表明: 研究区表层沉积物中的重金属含量与国内典型河口湿地相比处于较高水平.从空间分布上看,重金属含量东部高于西部,在人类活动密集区存在明显的累积性.环境风险指数法分析结果表明,Cu对该区域环境污染的影响最大,而Hakanson潜在生态危害指数法分析结果表明,Hg和Cd的潜在生态危害最大,重金属的综合潜在生态危害指数介于93.65~507.20,平均值为189.30,属于中等生态危害,并以东部潜在危害程度最大,应作为今后重金属污染防治的重点区域.

Abstract: Kriging interpolation analysis was conducted with ArcGIS to find out the distribution characteristics of heavy metals concentrations in the surface sediments of the coastal wetland mudflat on the Yalu River estuary, environmental risk index and Hakanson potential ecological risk index were used to assess their extents of pollution in this area.The concentrations of heavy metals in the surface sediments of the study area were at a relatively high level compared with the typical estuarine wetland. The concentration of heavy metals in the east was higher than that in the west, and in the human activity area, the concentration was higher. Cu was found to contribute the most to the pollution status based on environmental risk index method, while Hg and Cd produced the greatest potential ecological harm according to Hankanson Potential ecological risk index method. The average potential ecological risk index (RI) of the Yalu River estuary wetland was 189.30 (ranged from 93.65-507.20), suggesting a moderate ecological risk. However, the potential ecological risk was highest in the east and should be treated as the major heavy metal pollution prevention area in the future.