摘要
本文对洱海沉积物磷的含量、空间分布以及沉积剖面上沉积磷的化学赋存形态进行了研究。结果发现,洱海表层(5cm)沉积物中总磷的含量范围为736.40～1602.50mg/kg,平均为964.60mg/kg;北部湖区高于南部,弥苴河是湖泊的主要磷来源;洱海沉积物中各形态磷的含量高低顺序为:钙结合态磷,碎屑态磷,有机态磷,铁结合态磷,吸附态磷,磷形态的剖面变化反映了埋藏作用对沉积磷的强烈改造作用。
In order to understand the chemical characteristics of phosphorus in the sediment of Erhai Lake, more than 18 sediment cores have been collected, and the content and chemical forms of sedimentary phosphorus have been analyzed. The results of this study showed that the content of sedimentary total phosphorus ranges from 736.40 to 1 602.50mg/kg in surface sediment samples, with an average value of 964.60mg/kg. By applying the sequential extraction method, study on the phosphorus chemical phases, mainly Ca-bound P and organic phosphorus forms, showed that the vertical distribution profile of sedimentary phosphorus is possibly related to early diagenesis processes of sediment in Erhai Lake.
出处
《中国水利水电科学研究院学报》
2005年第2期150-154,共5页
Journal of China Institute of Water Resources and Hydropower Research
基金
国家自然科学基金项目(40103008)
关键词
沉积物
磷
化学形态
洱海
sediment
phosphorus
chemical forms
Erhai Lake
