长江流域资源与环境 >> 2010, Vol. 19 >> Issue (06): 724-.

• 湖泊资源与环境保护 • 上一篇    

东平湖表层沉积物中磷的形态分布特征研究

田忠志1, 邢友华2, 姜瑞雪2, 高雁2   

  1. (1.淮河水资源保护科学研究所| 安徽 蚌埠 233001|2.山东农业大学水利土木工程学院| 山东 泰安 271018)
  • 出版日期:2010-06-20

DISTRIBUTION OF PHOSPHORUS FRACTIONS IN THE SURFICIAL SEDIMENTS OF DONGPING LAKE

TIAN Zhongzhi1, XING Youhua2, JIANG Ruixue2, GAO Yan2   

  1. (1.Institute of Huai River Water Resource Protection, Bengbu |233001, China|2.Water Conservancy and Civil Engineering College,Shandong Agriculture University, Taian 271018, China)〖 
     
  • Online:2010-06-20

摘要:

以东平湖表层沉积物为研究对象,应用连续提取法测定了其中的总磷(TP)、弱吸附态磷(NH4ClP)、铝磷(AlP)、铁磷(FeP)、钙磷(CaP)、残渣磷(ResP)、有机磷(OP)等形态磷的含量,探讨了东平湖表层沉积物中磷的形态分布特征。研究结果表明:东平湖表层沉积物中总磷的平均含量为79538 mg/kg,与我国其他湖泊相比含量较高。表层沉积物中的磷主要以无机磷的形式存在,含量为3849~1158.3 mg/kg,约占沉积物中总磷的8076%。各形态无机磷的含量在〖JP+1〗沉积物中的含量大小顺序为:CaP>ResP>AlP+FeP>NH4ClP,分别占无机磷的448%、312%、231%和09%。老湖码头和湖心岛附近沉积物中有机磷含量略高于其他区域,这与两处附近均有大片网箱养殖区和接纳较多生活污水有关。生物可利用磷在东平湖沉积物中的含量较高,平均为2458 mg/kg,占总磷的309%,沉积物中磷向上覆水释放的潜在风险较大。

Abstract:

Total phosphorus(TP),weakly adsorbed phosphorus(NH4ClP),Albound phosphorus(AlP),Febound phosphorus(FeP),Cabound phosphorus (CaP),residual phosphorus(ResP) and organic phosphorus(OP) in surficial sediment of Dongping Lake were measured by the sequential extraction process.And the distribution of phosphorus fractions were analyzed.The results showed that the average contents of TP were 79538 mg/kg in the surficial sediments of Dongping Lake,which was a little higher than that of the other lakes in China.The phosphorus mainly distributed in inorganic fractions(IP),ranging from 3849 to 1158.3 mg/kg,which accounted for 8076% of TP in the surficial sediments of Dongping Lake.The decease order of different inorganic fractions was CaP>ResP>AlP+FeP> ExpP,accounting for 448%,312%,231% and 09% of IP,respectively.The OP is slightly higher in Laohu pier and midlake,which might be caused by the cage culture and the acceptance of more sewage.The average contents of bioavailable phosphorus was 2458 mg/kg,accounting for 309% of TP in the surficial sediments of Dongping Lake,which indicated that the surficial sediments might be a potential phosphorus source for the overlying water of Dongping Lake.

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