大量研究表明,在外源输入得到有效控制后，对湖泊内源磷进行持久控制才是解决湖泊富营养化问题的根本。基于铝、钙及镧改性粘土的原位钝化技术被认为是控制湖泊内源磷释放的有效措施之一，在国际上得到了越来越多的应用。然而，对该项技术在风浪扰动强以及有机质输入大的浅水湖泊中的应用却未系统开展。本项目以课题组前期选择的廉价热处理富钙凹土为钝化材料，开展室内模拟与现场原位钝化实验，应用风浪扰动模拟系统、磷同步辐射、高精度DGT磷测定等技术，基于磷形态提取与磷微观表征，阐明富钙粘土对底泥磷形态转化的分子机制；通过磷释放与界面特征测定，探讨风浪扰动、溶氧波动、有机质输入等因素对底泥磷钝化层的稳定性及磷钝化效力的影响；基于现场原位钝化和室内研究结果，揭示风浪扰动与有机质输入等因素对底泥磷钝化的影响机制，提出粘土基磷钝化剂在浅水湖中的应用条件，为我国浅水富营养湖泊的治理提供科学依据。

The results of lot of studies indicated that it is the key issue to permanently control the sediment P loading and thus to solve the problem of lake eutrophication when exogenous pollution was effectively inhibited. The in situ inactivation technology using Al/Ca or La modified clay minerals was regarded as one of the effective measure to control P release from sediment internal loading. However, whether this technology can be used in shallow eutrophic lakes with strong wind turbulence and high input of organic matter has not been carried out. In this research, we use the low-cost thermally modified calcium-rich attapulgite as inactivation material to carried out laboratory and field experiments and relied on the simulated hydrodynamic force system, phosphorus synchrotron radiation, high resolution DGT measurement of P. We want to elucidating the molecule mechanism of P transformation using P chemical extraction and P microcosmic characterization and investigate the influence of wind turbulent motion, oxygen fluctuation and organic matter inputting on the stability of inactivation layer and their influence on the sediment P inactivation capability. At last, the compound mechanism with the influence of wind turbulent motion and organic matter was revealed through the laboratory and field results. The main influence factor and the method to use the modified clay mineral in shallow eutrophic lake for controlling the sediment internal P loading were given. The results of this study will be a guild to the remediation of shallow eutrophic lakes.