Phosphorus Forms and Its Distribution in Source Water Reservoir Sediment
Phosphorus Forms and Its Distribution in Source Water Reservoir Sediment
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源水库沉积物中磷的形态及其分布
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发表时间：
2011
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通讯作者：
Liu Hong
中科院分区：
文献类型：
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作者：
Liu Hong
采用淡水沉积物中磷形态的标准测定方法，分析了西安市潭峪水库表层沉积物中总磷的含量及形态分布。分析了表层沉积物中磷形态与部分孔隙水水质及其他沉积物地球化学特征的相关系数。该水库表层沉积物中总磷含量在1 215.03~1 592.83μg/g之间，Fe/Al结合态P平均含量为241.34μg/g。在其他形态磷中，Fe/Al-P的平均含量为100 mg/g。钙结合磷(Ca-P)含量为711.98μg/g，有机磷(OP)含量为301.54μg/g。相关分析表明，总有机碳与Fe/Al-P呈显著正相关。Fe/Al-P是水库富营养化的潜在威胁，当氧化还原电位降低时，由于Fe(Ⅱ)的溶解，曾经与铁结合的磷将被释放到上覆水和孔隙水中。
Total phosphorus(TP)and distribution of phosphorus speciation in surface sediments collected from Tan-gyu Reservoir in Xi’an were analyzed,using the standard measurement and test(SMT)procedure of phosphorus forms in the freshwater sediments.Correlation coefficients between phosphorus forms and some water qualities of pore water and some other sediment geochemical characteristics were analyzed.The TP content in surface sediment of this reservoir varied from 1 215.03～1 592.83,μg/g.The average content of Fe/Al-bound phosphorus(Fe/Al-P)was 241.34 μg/g.Among the other speciations of phosphorus,the content of Ca-bound phosphorus(Ca-P)was 711.98 μg/g and organic-phosphorus(OP)was 301.54 μg/g.From the correlation analysis,TOC was significantly and posi-tively correlated to Fe/Al-P.The Fe/Al-P,which can be released into the overlying water when environment changes,is the potential threat to the reservoir eutrophication.When the oxidation-reduction potential decreases,the phosphorus which was once bonded with ferrous will be released into the pore water and the overlying water because of the dissolution of Fe(Ⅱ).