长春南湖底泥磷、氮和重金属元素环境地球化学行为研究

利用３个剖面对长春南湖底泥中营养元素及其重金属研究表明，底泥中的氮、磷、铜、铅、锌、锰、铁在平面上和剖面上都有规律变化。在平面上浓度变化与水生植物、水深及与排污口距离有关。在有水生植物的水区磷、氮和重金属元素浓度低于其他区。从剖面上看上层底泥浓度高于下层底泥浓度，表明湖水体近几年污染程度加重。不同图解表明，湖体内污染元素主要与排污口污水有关。为了防止“水变”的出现，挖底泥和放湖水是需要的 

Environmental and Geochemical Characteristics of Nitrogen,Phosphorus and Heavy Metal Elements in Sediments of South Lake of Changchun

Nitrogen,phosphorus and heavy metal elements in the sediments of South Lake of Changchun,Jilin Province,varied regularly in their sectronal concentrations.Three sections were studied. I-Section had lower N,P and heavy metal elements than -and -sections.It was believed that lower results were related to the aquatic plants,such as vaterhyacinth and lotus.P,N and heavy metal elements were higher in upper parts of sediments than those in lower parts in every section,which indicated that the water body had been polluted seriously in recent years.To prevent the pollution disaster to appear again,the government should take actions such as digging up the sediments or discharging the lake water thoroughly.