Li Da-Peng, Huang Yong, Li Yong, Pan Yang
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China.
Huan Jing Ke Xue. 2012 Feb;33(2):379-84.
To examine the impact of sediment disturbance time (disturbance 10 min and 9h, respectively) on the transformation of phosphorus forms in suspended solids, the microcosm experiment was carried out with sediment and lake water from Yueliang estuary in Taihu Lake. The transformation of phosphorus forms in suspended solids was analyzed. The longer disturbance time, the greater of dissolved total phosphorus (DTP) in the overlying water was observed. However, in the control experiment, the concentration of DTP was higher than that in the disturbance experiment. Sequential fractionations indicted that mass fraction of Fe/Al-P to Tot-P in the suspended solids decreased gradually under disturbance conditions (10 min, 9 h) with increasing the experiment time, and then, the values decreased to 42.5% (10 min) and 38.1% (9 h) at 10 d, respectively. At the end, they increased slightly, compared with the values at 10d. However, mass fraction of HCl-P to Tot-P in the suspended solids increased gradually with time, and then went up to the highest (48.9%, 10 min and 53.7%, 9 h) value at 10 d. It suggested that sediment disturbance promoted the transformation of phosphorus forms in the suspended solids, especially from mobile phosphorus forms to refractory forms.
为研究沉积物扰动时间（分别为10分钟和9小时）对悬浮固体中磷形态转化的影响，利用太湖月亮湾河口的沉积物和湖水进行了微观实验。分析了悬浮固体中磷形态的转化情况。结果表明，扰动时间越长，上覆水中溶解态总磷（DTP）含量越高。然而，在对照实验中，DTP浓度高于扰动实验。连续分级分析表明，在扰动条件下（10分钟、9小时），随着实验时间延长，悬浮固体中Fe/Al-P占总磷（Tot-P）的质量分数逐渐降低，至第10天时分别降至42.5%（10分钟）和38.1%（9小时）。最后，与第10天时相比略有增加。而悬浮固体中HCl-P占Tot-P的质量分数随时间逐渐增加，至第10天时达到最高值（10分钟时为48.9%，9小时时为53.7%）。这表明沉积物扰动促进了悬浮固体中磷形态的转化，尤其是从活性磷形态向难溶性磷形态的转化。
