随着全球气候不断上升，湖泊富营养化状态不断加剧，污染物质在沉积物，间隙水以及水生生物三相之间进行着不间断的交换，重金属污染物在这三相之间的地球化学行为对水环境和生态安全都有着极为重要的影响。本文研究了蓝藻水华爆发时太湖沉积物中重金属Cd的形态变化。研究发现铜绿微囊藻的生长改变了不同深度沉积物中的氧化还原电位，提高了Cd从沉积物内部向水体系中扩散的速率，加大了沉积物中可还原态以及酸溶态Cd的释放。
With the rising global climate and the increasing eutrophication of lakes, pollutants are continu-ously exchanged among sediments, interstitial water and aquatic organisms. The geochemical be-havior of heavy metal pollutants between these three phases has a very important impact on water environment and ecological security. The morphological changes of heavy metal Cd in Taihu Lake sediments during cyanobacterial blooms were studied. It was found that the growth of Microcystis aeruginosa changed the redox potential environment in sediments of different depths, increased the diffusion rate of Cd from sediment to water system, and increased the release of reducible and acid-soluble Cd in sediments.