5th UF Water Institute Symposium Abstract

Submitter's Name Siti Jariani Mohd Jani
Session Name Poster Session - Watershed & Wetland Management
Poster Number 61
Author(s) Siti Jariani Mohd Jani,  University of Florida (Presenting Author)
  Gurpal Toor,  University of Florida
  Bioavailability Of Organic Nitrogen in Residential Stormwater Runoff
  Organic nitrogen (ON) is the main fraction of total nitrogen in urban water bodies. Yet our knowledge about contribution of ON to nutrient enrichment and eutrophication in water bodies is poorly understood. Research on bioavailability of ON in residential stormwater runoff from urban catchments is lacking. The objectives of this study were to determine and quantify the spatial and temporal evolution of bioavailable ON in urban stormwater runoff. Our methods including sampling stormwater runoff from residential catchments using autosamplers and grab samples. Bioassay experiments were conducted using samples collected from stormwater ponds inlets and outlets. Samples were incubated for 5 days under 12:12 light:dark cycle at the ambient temperature of 26°C. Samples were then analyzed for ammonium (NH4-N), nitrate (NOx-N), total nitrogen (TN), total organic carbon (TOC) and dissolved organic carbon (DOC). Selected samples were analyzed for stable isotopes of N and O of NOx-N. Data are being interpreted and will be used to prepare a poster presentation.