Influences of Different Factors on Removal Effect of Phosphorus in Substrate of Constructed Wetlands
XUE Chong-hua et al(College of Environmental Science and Engineering,Tongji University,Shanghai 200092)
[Objective]The research aimed to study the influences of different factors on the removal effect of phosphorus in the substrate of constructed wetlands.[Method]Through the static-shaker experiment and dynamic-adsorption column experiment,the influences of types of substrate,temperature,particle diameter of substrate on phosphorus removal of the substrate were investigated.[Result]The phosphorus removal efficiency of various substrates differed dramatically,with the maximum adsorption amount of steel dregsshalezeolitegravel. Phosphorus absorption parameters obtained by different experimental methods were different.The adsorption capacity of phosphorus by substrate was enhanced gradually with the increasing of temperature.There was a negative relationship between particle diameter of substrate and phosphorus adsorption.[Conclusion]The research provided theoretical guide for the selection of substrate in constructed wetlands and wetland operation.
【CateGory Index】： X703