长江三角洲潮滩重金属污染研究现状与趋势

近些年由于工业与生活废水不合理排放,导致了长江三角洲潮滩面临严重的重金属污染问题,对长江口生态环境造成威胁。为此,本文在广泛收集前人研究结果的基础上,从重金属在潮滩沉积物的沿岸分布和垂岸分布、重金属的粒度效应、长江泥沙重金属吸附、以及潮滩动植物重金属含量和生态效应等方面总结了其分布规律和富集特征,并从三峡建坝和长江口水文地貌等角度,对今后长江口潮滩重金属污染研究方向提出了一些建议。

Progress in Research on Heavy Metal Contamination in the Tidal Flats of the Yangtze Delta

Research on heavy metal contamination in the tidal flats of the Yangtze Delta had been documented in the past two decades, most of which can track back to the unregulated input of industrial and municipal effluents. Summarized in this paper are the results of many previous studies on this subject, which are thoroughly elaborated in the following aspects:heavy metal concentrations and spatial distributions in the sediments of tidal flats, the relationship between heavy metals and sediment grain size, absorption of heavy metals on suspended matter in the Yangtze River, the concentrations in the benthic fauna living in the tidal flats and their ecological response. Furthermore, the author has also proposed some suggestions on the future development tendency of heavy metal contamination in the tidal flats of the Yangtze Delta.