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太湖和辽河沉积物重金属质量基准及生态风险评估

邓保乐 祝凌燕 刘 慢 刘楠楠 杨丽萍 杜 样

邓保乐, 祝凌燕, 刘 慢, 刘楠楠, 杨丽萍, 杜 样. 太湖和辽河沉积物重金属质量基准及生态风险评估[J]. 环境科学研究, 2011, 24(1): 33-42.
引用本文: 邓保乐, 祝凌燕, 刘 慢, 刘楠楠, 杨丽萍, 杜 样. 太湖和辽河沉积物重金属质量基准及生态风险评估[J]. 环境科学研究, 2011, 24(1): 33-42.
DENG Bao-le, ZHU Ling yan, LIU Man, LIU Nan nan, YANG Li ping, DU Yang. Sediment Quality Criteria and Ecological Risk Assessment for Heavy Metals in Taihu Lake and Liao River[J]. Research of Environmental Sciences, 2011, 24(1): 33-42.
Citation: DENG Bao-le, ZHU Ling yan, LIU Man, LIU Nan nan, YANG Li ping, DU Yang. Sediment Quality Criteria and Ecological Risk Assessment for Heavy Metals in Taihu Lake and Liao River[J]. Research of Environmental Sciences, 2011, 24(1): 33-42.

太湖和辽河沉积物重金属质量基准及生态风险评估

基金项目: 国家水体污染与治理科技重大专项(2008ZX07526-003);国际合作项目(2009DFA91910);天津市科学技术委员会科技支撑项目(08ZCGHHZ01000).

Sediment Quality Criteria and Ecological Risk Assessment for Heavy Metals in Taihu Lake and Liao River

  • 摘要: 以太湖、辽河的表层沉积物为研究对象,运用相平衡分配法(EqP)初步探讨了两流域沉积物中4种重金属(Cd,Cu,Pb,Zn)的沉积物质量基准(CSQC)推荐值,并对两流域沉积物中的重金属进行了生态风险评估. 根据美国国家环境保护局(US EPA)基于水生生物对重金属的最终慢性毒理水平的淡水水质基准,制定了太湖及辽河4种重金属(Cd,Cu,Pb和Zn)的沉积物质量基准推荐值分别为6.42,55.3,20.6和201.5 mg/kg及5.42,52.8,18.9和177.7 mg/kg. 通过与不同国家及地区制定的CSQC值进行比较,推算出4种重金属的CSQC值大都接近所有数据的中间值. 从沉积物固相和间隙水相2个不同的角度对沉积物中重金属进行的生态风险评估表明,两流域的大部分区域同步可提取重金属(SEM)与酸可挥发性硫化物(AVS)含量的差值大于0,而i[CTi]/[CSQC,i]值与i[CIW,i]/[CCCi]值均大于1,说明在整体上两流域沉积物中的重金属存一定的生态风险. 由于未考虑各金属元素之间的拮抗或协同等作用以及底栖生物敏感性的问题,所使用的生态风险方法在评价生态风险方面可能会相对有所偏差.

     

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出版历程
  • 收稿日期:  2010-06-06
  • 修回日期:  2010-09-01
  • 刊出日期:  2011-01-25

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