密云水库沉积物-水界面磷的地球化学作用  

The Study on Phosphorus Geochemical Effects of Sediment -Water Interface in Miyun Reservoir

作　　者：刘晓端[1] 徐清[1] 刘浏[2] 武佃卫 

机构地区：[1]国家地质实验测试中心,北京100037 [2]吉林大学化学系,吉林长春130026 [3]北京市水文总站,北京100039

出　　处：《岩矿测试》2004年第4期246-250,共5页Rock and Mineral Analysis

基　　金：国家重点基础研究发展规划项目(G1999045705)

摘　　要：以密云水库为例,研究了水库沉积物中有机质的含量与有机磷的关系,表明表层沉积物中的总有机碳和有机磷的含量都明显高于底层,是由于一些以磷为营养素的富营养化指示藻类在水体中逐年增加,它们死亡后的残骸经分解-矿化后在底积物中累积的结果。沉积物和孔隙水中磷的剖面特征研究表明,表层沉积物和孔隙水中的磷都有明显上升的趋势,是由于沉积物的表层微生物和活性有机碎屑层比较丰富,有机质降解和含磷的有机化合物分解,使溶解性磷酸盐进入孔隙水。对沉积物磷形态、总有机碳及孔隙水中总磷对磷释放的影响进行了线性相关分析,结果表明上覆水中的磷主要来自沉积物的铁结合态磷、铝结合态磷、溶解态磷三种形态,孔隙水中总磷以及总有机碳含量对上覆水中总溶解磷浓度存在较大的影响,这些为研究水库沉积物作为水库内污染源对水质的影响提供了基础资料。A study on the relationship between organic matter content and organic phosphorus content in sediments of Miyun Reservoir is reported in this paper. The results show that the contents of total organic carbon (TOC) and organic phosphorus in the surficial sediments are obviously higher than that in the bottom sediments. This is supposed to be the result of the increasing eutrophical indicator algae in the water with phosphorus as nutriment, when they died and whose debris accumulated in the surficial sediments by the decomposed and mineralized effects. The results from the study on characters of phosphorus section distribution show that there are obviously ascending of phosphorus content in the surficial sediments and pore water. This phenomenon is supposed to be due to the abundant animalcule and active organic oddment in the surficial sediments and decomposition of organic matter and phosphorus compounds, leading to the dissoluble phosphorus (DP) into the pore water. Based on the linear correlativity analysis with the statistical software of SPSS to the influences of forms of sedimentary phosphorus in the sediments, TOC and total phosphorus (TP) in interstitial water on phosphorus releasing, it is concluded that phosphorus in upper water of surficial sediment comes from three kinds of species of phosphorus—Fe-P, Al-P, DP in sediments and the contents of TP and TOC in interstitial water have strong influence on the concentration of total dissoluble phosphorus (TDP) in upper water of surficial sediment.The results from the study provide some basic information for further research on the effect of sediments,as an inner contaminant, on water quality of reservoir.

关 键 词：沉积物-水界面 总有机碳 上覆水 总磷 密云水库 磷释放 富营养化 结合态 孔隙水 地球化学 

分 类 号：P736[天文地球—海洋地质] X524[天文地球—海洋科学]