摘要
对武汉东湖3个样点沉积物及间隙水不同形态磷的浓度进行了测定,结果表明:(1)位于排污区附近的1号点沉积物TP浓度最大,位于湖心位置的2号点TP浓度最小;(2)3个样点沉积物中不同形态磷含量均为Fe-P(铁结合态磷)所占比例最大(38.85%～59.14%),LP(不稳定态磷)所占比例最小(0.27%～1.49%);(3)东湖沉积物中活性磷含量较高,有较大的磷释放潜力;(4)东湖表层沉积物间隙水中正磷酸盐和上覆水中正磷酸盐存在较大浓度梯度,浓度梯度可能不是间隙水和上覆水之间磷交换的决定性因素。
In the present study, the vertical variation of different phosphorus forms were investigated in both sediment and interstitial water samples from three typical sites in Lake Donghu. The results showed that： （1） the highest concentration of TP was found at the most polluted site near the outfall of domestic sewer- age （site I） ,and the lowest concentration of TP was detected at the center of Lake Donghu （site Ⅱ ） % （2） the major and the minimal forms of TP were iron bounded phosphorus （Fe-P, accounted for 38. 85%- 59.14%） and liable phosphorus （LP,accounted for 0.27%-1.49%） ,respectively; （3） the high concentra- tion of mobile phosphorus was detected, and the result indicated that the sediment in Lake Donghu could become a potential sourse for phosphorus release; （4） high concentration gradient of PO4^3-- between intersti- tial water and overlying water was detectived,but it is not the determinant factor of the exchange of phos- phorus between interstitial water and overlying water of Lake Donghu.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2013年第1期104-109,共6页
Resources and Environment in the Yangtze Basin
基金
开放实验室资助项目"疏浚工程对东湖沉积物-水界面磷迁移转换的影响研究"(2009FB20)
973课题项目"集约化养殖水体理化环境状况研究"(2009CB118705)
水专项"三峡水库支流水华成因及控藻关键技术研究与工程示范"(2009ZX07104-005-03)
关键词
沉积物
间隙水
磷
垂直分布
东湖
sediment
interstitial water
phosphorus
vertical distribution
Lake Donghu
