典型城市浅水湖泊沉积物磷形态的分布及与富营养化的关系  

Relation Between Distribution of Phosphorus Form in the Sediment of Typical Urban Shallow Lakes and Eutrophication

作　　者：王超[1] 邹丽敏[2] 王沛芳[1] 林志评[2] 

机构地区：[1]河海大学环境科学与工程学院浅水湖泊资源开发与综合治理教育部重点实验室,南京210098 [2]河海大学环境科学与工程学院,南京210098

出　　处：《环境科学》2008年第5期1303-1307,共5页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2002CB412303);教育部科技重点项目(106088);江苏省基础研究计划项目(BK2007526)

摘　　要：应用乙二胺四乙酸法对典型城市浅水湖泊：玄武湖、莫愁湖和大明湖的表层沉积物中磷的形态进行连续提取和测定.研究表明,表层沉积物中铁磷和钙磷是磷的主要存在形态,占总磷的80%左右,玄武湖和莫愁湖的铁磷明显高于大明湖,可达30%-40%.3个湖泊表层沉积物中有机磷形态以碱可提取有机磷为主,酸可提取有机磷含量较低,但其与总磷的比值可以较好地反映湖泊富营养化程度.The forms of phosphorus in the surface sediments were extracted and determined sequentially with ethylene dinitrilo tetracetic acid （EDTA） technique in three urban shallow lakes： Lake Xuanwu, Lake Mochou and Lake Daming. The results showed that the iron and calcium-bound phosphate, about accounting for 80%, were the main forms of total phosphorus. The contents of iron bound phosphate in Lake Xuanwu and Lake Mochou were higher than that of Lake Daming, reaching 30%-40%. The organic phosphorus existed mainly in the form of alkali extractable phosphorus, while the contents of acid extractable organic phosphorus were low. However, the proportion of acid extractable organic phosphorus to the total phosphorus can indicate the degree of lake eutrophication.

关 键 词：磷形态 城市浅水湖泊 沉积物 湖泊富营养化 乙二胺四乙酸(EDTA) 

分 类 号：X524[环境科学与工程—环境工程]