Abstract：The forms, contents and distribution patterns of 5 heavy metals (Cr, Cu, Ni, Pb, Zn) were surveyed at a lake shore of Meiliang Bay, Taihu Lake, China. This area was characterized by algal enrichment and no allochthonous pollutant input. Cu, Ni and Zn were enriched in sediment samples at both eulittoral and infralittoral subzones, while Cr and Pb were only enriched in the infralittoral subzone (enrichment factor > 1). The residual form fractions of all 5 heavy metals in sediments of the littoral subzones were lower than those of the profundal subzone. The residual Ni fraction in the littoral subzone sediments was 30.68%±0.56% and was 34.67%±2.72% in that of the profundal subzone. The residual Pb fraction was 25.45%±3.82% in the littoral subzone sediments and was 34.17%±0.85% in that of profundal subzone. Less residual form fractions in the littoral subzone than those of the profundal subzone means that the more part of heavy metals in the littoral subzone was in the labile form and easy to release to the above water. In the littoral zone with algae accumulation, the sediments generally serve as a sink despite the fact that only a small part of heavy metals could release to the water layer.
刘红磊, 尹澄清, 唐运平. 太湖梅梁湾岸边带底泥中重金属的形态与分布[J]. 中国环境科学, 2010, 30(3): 389-394.
LIU Hong-Lei, YIN Cheng-Qing, TANG Yun-Ping. Distribution and speciation of heavy metals in sediments at a littoral zone of Meiliang Bay of Taihu Lake. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(3): 389-394.
