3Steven son F J.Cycle of Soil Carbon,Nitrogen,Phosphorus,Sulfur and Micronutrients[M].New York:Lew is Publishers,1985.
4Arias C A,Bubba M Del Brix H.Phosphorus removal by sands use as media in subsurface flow constructed reed beds[J].Water Sci Technol.2001,35(5):1159-1168.
1Clark T,Sttephenson T,Pearce P A.Phosphorus removal by chemical precipitation in a biological aerated filter[J].Water Research,1997,31 (10):2557 -2563.
2Rogalla F,Payraudeau M.Nitrification and phosphorus precipitation with biological aerated filters[ J ].Research Journal WPCF,1990,62 (2):169-176.
3Fytianos K,Voudrias E,Raikos N.Modelling of phosphorus removal from aqueous and wastewater samples using ferric iron[ J ].Environmental Pollution,1998,101:123 -130.
