6Sate of Georgia Department of Natural Resources Envi ronmental Protection Division, Water Protection Branch.Guidelines for constructed wetlands for municipal wastewater facilities[R].Revised 2002.
7Maia S Firming-Singer, et al. Enhanced Nitrate Removal Efficiency in Wetland Microcosms Using an EPisediment Layer for Denitrification [J].Enviromental Science Technology, 2002,36.
8ZHU T,JENSSEN P D,MACHLUM T,et al.Phosphorous sorption and chemical characteristics of lightweight aggregates (LWA):potential filter media in treatment wetlands[J].Water Sci Tech,1997,35:103-108.
9DRIZO A,FROST C A,GRACE J,et al.Physicochemical screening of phosphate removing substrates for use in constrocted wetland systems[J].Water Res,1999,33:3595-3602.