The effects of sediment aluminum (Al), organic carbon (OC), and dissolved oxygen (DO) on phosphorus (P) transformation, at the water-sediment interface of a eutrophic constructed lake, were investigated via a series of simulative experiments. The above three factors had various influences on dissolved P concentration, water pH, water and surface sediment appearance, and P fractions. Additions of Al had the greatest effect on suppressing P release, and the water pH remained alkaline in the water-sediment system under various OC and DO conditions. No dissolution of the added Al was detected. ³¹P-NMR characterization suggested that OC addition did not promote biological P uptake to polyphosphates under oxic conditions. The simulation result on the added phytate indicated the absence of phytate in the original lake sediment. As compared to the reported natural lakes and wetland, the water-sediment system of the constructed lake responded differently to some simulative conditions. Since Al, OC, and DO can be controlled with engineering methods, the results of this study provide insights for the practical site restorations.

通过一系列模拟实验，研究了富营养化湖泊水-沉积物界面上的沉积物铝（Al），有机碳（OC）和溶解氧（DO）对磷（P）转化的影响。以上三个因素对溶解的P浓度，水的pH值，水和表面沉积物的外观以及P的分数有不同的影响。Al的添加对抑制P释放的影响最大，在各种OC和DO条件下，水沉淀系统中的水pH值保持碱性。没有检测到添加的Al的溶解。³¹P-NMR表征表明，在有氧条件下，OC的添加不会促进生物磷对多磷酸盐的吸收。添加植酸盐的模拟结果表明原始湖沉积物中不存在植酸盐。与报告的天然湖泊和湿地相比，人工湖的水沙系统对某些模拟条件的反应不同。由于可以使用工程方法控制Al，OC和DO，因此本研究的结果为实际的现场修复提供了见识。