CAJ | 학술논문

自制模拟河道,取含磷的河道底泥进行试验,考察了温度、扰动、溶解氧等因素对河道底泥释磷的影响.结果表明,加大换水频率、缩短停留时间可以维持较好的水质,但并不能从根本上降低释磷量;溶解氧水平对底泥释磷的影响较大,低溶解氧水平(0.8 mg/L)下的释磷量是高溶解氧水平(7.2 mg/L)下的3.7倍;扰动(风)是影响底泥释磷的主要因素,有扰动时上覆水的TP浓度是无扰动时的4倍多;释磷强度会随温度的升高而明显增大,在静态条件下,水温为22℃时的T1P浓度是8℃时的1.5倍.
자제모의하도,취함린적하도저니진행시험,고찰료온도、우동、용해양등인소대하도저니석린적영향.결과표명,가대환수빈솔、축단정류시간가이유지교호적수질,단병불능종근본상강저석린량;용해양수평대저니석린적영향교대,저용해양수평(0.8 mg/L)하적석린량시고용해양수평(7.2 mg/L)하적3.7배;우동(풍)시영향저니석린적주요인소,유우동시상복수적TP농도시무우동시적4배다;석린강도회수온도적승고이명현증대,재정태조건하,수온위22℃시적T1P농도시8℃시적1.5배.
The sediment from simulated riverway containing phosphorus was studied to investigate the influence of temperature, disturbance and dissolved oxygen (DO) on the phosphorus release from the sediment.The results show that increasing the frequency of changing water and shortening the residence time can maintain good water quality environment, but it does not fundamentally reduce the amount of phosphorus released.The DO levels impact the phosphorus release from the sediment significantly, the a-mount of phosphorus released with low DO of 0.8 mg/L is 3.7 times of that with high DO of 7.2 mg/L.The disturbance is a main factor impacting the phosphorus release from the sediment, the TP concentra-tion with disturbance is more than 4 times of that without disturbance.The intensity of the phosphorus re-lease is increased with the temperature increased, and under static conditions, the TP concentration with temperature of 22℃ is 1.5 times of that with temperature of 8℃.