Title | Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment |
Publication Type | Journal Article |
Year of Publication | 2019 |
Authors | Young, EO, Ross, DS, Sherman, J |
Journal | Journal of Visualized Experiments |
Issue | 149 |
Date Published | 2019/07 |
Abstract | Phosphorus (P) is a critical limiting nutrient in agroecosystems requiring careful management to reduce transport risk to aquatic environments. Routine laboratory measures of P bioavailability are based on chemical extractions performed on dried samples under oxidizing conditions. While useful, these tests are limited with respect to characterizing P release under prolonged water saturation. Labile orthophosphate bound to oxidized iron and other metals can rapidly desorb to solution in reducing environments, increasing P mobilization risk to surface runoff and groundwater. To better quantify P desorption potential and mobility during extended saturation, a laboratory microcosm method was developed based on repeated sampling of porewater and overlying floodwater over time. The method is useful for quantifying P release potential from soils and sediments varying in physicochemical properties and can improve site-specific P mitigation efforts by better characterizing P release risk in hydrologically active areas. Advantages of the method include its ability to simulate in situ dynamics, simplicity, low cost, and flexibility. |
URL | https://www.jove.com/video/60072/measuring-phosphorus-release-laboratory-microcosms-for-water-quality |
DOI | 10.3791/60072 |
Short Title | JoVE |
Refereed Designation | Refereed |
Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
Status:
Published
Attributable Grant:
BREE
Grant Year:
Year4
Acknowledged VT EPSCoR:
Ack-No