| 巢湖沉积物磷的形态及其与间隙水磷的关系 |
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| 引用本文： | 汤宝靖,;陈雷,;姜霞,;金相灿.巢湖沉积物磷的形态及其与间隙水磷的关系[J].农业环境保护,2009(9):1867-1873. |
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| 作者姓名： | 汤宝靖 ;陈雷 ;姜霞 ;金相灿 |
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| 作者单位： | [1]吉林建筑工程学院市政与环境工程学院,吉林长春130021; [2]中国环境科学研究院,北京100012 |
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| 基金项目： | 国家水专项（2008ZX07101-010）;国家自然科学基金（20507017） |
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| 摘 要： | 采用磷形态的连续提取法，研究了巢湖沉积物中磷的地球化学形态及间隙水中总溶解性磷（DTP）、可溶性磷酸盐（DIP）、可溶性有机磷（DOP）含量的垂向分布特征。结果表明，西湖区的沉积物总磷含量明显高于东湖区。表层沉积物中活性磷含量占总磷的44％-81％，金属氧化物结合态磷（NaOH—P）作为活性磷的主要存在形式，在西湖区含量比例达到47％-60％，对磷释放起重要贡献；磷形态剖面表明，西湖区的金属氧化物结合态磷、可还原态磷（BD—P）含量高于东湖区。金属氧化物结合态磷、可还原态磷、钙结合态磷（HCl-P）受人类活动影响较大，有机磷（Org—P）受外源磷污染影响很小；BD—P、NaOH—P随深度增加而减小，说明巢湖近期磷负荷有增加的趋势；DTP、DIP、DOP在水-沉积物界面的浓度梯度反映它们有自间隙水向上覆水扩散的趋势；巢湖间隙水不同形态磷与BD—P、NaOH—P显著相关（α=0．01）。这项研究可为巢湖内源污染和富营养化的控制与治理提供理论参考。
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| 关 键 词： | 巢湖 沉积物 磷 形态分布 间隙水 |
Phosphorus Speciations in Sediments and Their Relationships with Soluble Phosphorus Concentrations in Porewater in Lake Chaohu |
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| Institution: | TANG Bao-jing, CHEN Lei, JIANG Xia, JIN Xiang-can (1.School of Municipal and Environmental Engineering, Jilin Architectural and Civil Engineering Institute, Changchun 130021,China; 2. Chinese Research Academy of Environmental Sciences, Beijing 100012, China) |
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| Abstract: | The vertical distribution of phosphorus （P） speciations in the sediments and the porewater from Lake Chaohu were investigated using the sequential extraction methods. The concentrations of the total P（TP） in the surface sediment from western lake were obviously higher than eastern lake. The proportion of active P was accounted for 44%-81% of TP. NaOH-P acted as an active P speciation from the sediment in the western lake accounted for 47%-60% of TP, which plays an important role in phosphorus release. The concentrations of NaOH-P and BD-P from the surface sediment in their vertical distributions were much higher in western lake than in eastern lake. NaOH-P, BD-P and HCl-P were easily influenced by human activities, while Org-P was less influenced by extraneous sources. The concentrations of BD-P and NaOH-P decreased with the increase of sediment depth, which indicated an increasing trend for P burden in surface sediment in Chaohu Lake. The possibility of P released from sediment to overlying water could be proved by the concentration difference of DTP, DIP and DOP between the porewater and overlying water. Regression analyses showed that different P speciations in the interstitial water were significantly correlated with BD-P and NaOH-P in the sediment. This study results are important for the eutrophication control and ecological restoration in Lake Chaohu. |
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| Keywords: | Lake Chaohu sediment phosphorus species distribution porewater |
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