摘要
采集了滇池湖滨带的表层和柱状沉积物,研究分析了湖滨带沉积物中总磷、钙磷和铁铝结合态磷的空间分布和垂向分布特征。结果表明,滇池湖滨带表层沉积物总磷含量高,个别点位高达10604.64mg/kg,总磷含量均值为2452mg/kg,沉积物受磷污染严重;不同区域沉积物磷的含量差别较大;表层和柱状沉积物中的钙磷含量都高于铁铝结合态磷,这是滇池湖滨带不同于其他湖泊的地方;柱状沉积物各种磷形态含量在垂向分布上的波动较大,但钙磷和铁铝结合态磷含量水平与总磷具有一致性;13个采样点有12个点的沉积物铁铝结合态磷含量都低于钙磷,两者比值<0.5,钙磷是总磷的主要组成部分,应该考虑环境酸化引起的磷释放风险。
The surface and column sediments collected from lakeshore area of Dianchi,Yunnan Province were used to study the distribution and vertical changes of TP,Ca-P and Fe/Al-P.Results showed that the sediments of the lakeshore area had high TP contents,with the maximum up to 10604.64mg/kg and average TP content of 2452mg/kg.The phosphorus pollution of sediments was serious,and variation of sediments in different regions of phosphorus content was large.Ca-P contents were higher than Fe/Al-P in Dianchi lakeshore area,which are different from other lakes.The contents of various phosphorus forms in column sediments fluctuated largely in the vertical distribution,but the contents level of Ca-P and Fe/Al-P were consistent with TP.In total 13 sampling sites,Fe/Al-P contents at 12 sampling sites were lower than Ca-P, with ratio of Fe/Al-P content to Ca-P content less than 0.5.Ca-P is the majority of TP,and the risk of phosphorus release resulting from ambient acidification should be considered.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第8期1-5,共5页
Environmental Science & Technology
基金
国家高技术研究发展计划项目(2005AA60101005)
国家重点基础研究发展计划项目(2008CB418200)
关键词
湖滨带
沉积物
磷
空间分布
滇池
lakeshore
sediment
phosphorus
distribution
Dianchi
