9 Sep 2019
Floating treatment wetland aided nutrient removal from agricultural runoff using two wetland species
Jonathan T. Spangler, David J. Sample, Laurie J. Fox, James S. Owen Jr (Virginia Tech) and Sarah A. White (Clemson University)
Floating treatment wetlands (FTWs) consist of rafts upon which wetland plants are grown. While FTWs have been found to reduce nutrients in runoff, data on commercial nurseries application is limited. We simulated FTW application to ponds collecting nursery runoff using Pontederia cordata and Juncus effuses in a mesocosm experiment. Pontederia cordata was clearly superior, removing more than 90% of total P and 84% of total N at high and low nutrient concentrations, respectively. Plant uptake transitioned from a slow establishment phase to maximum treatment after four to five weeks. This research demonstrates FTWs may provide effective treatment of nursery runoff.
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19 Aug 2019
Water Quality Characterization of Storm and Irrigation Runoff from a Container Nursery
Mohammad Nayeb Yazdi, David J.Sample, Durelle Scott, James S.Owen, Mehdi Ketabchy, and Nasrin Alamdari (Virginia Tech)
Runoff from container nurseries contains nutrient and sediment from fertilizer and irrigation. We assessed runoff total suspended solids (TSS), N as total N (TN), and P as total P (TP) from a 5.2 ha production area of a mid-Atlantic nursery. TN and TP storm loads were approximately 900, 35 and 50 times greater than irrigation loads. While TN and TP were comparable to urban runoff, TSS was 2-4 times greater. The Storm Water Management Model (SWMM) was calibrated to the results and used to generate annual TSS, TN, and TP loading, providing a valuable planning tool for nurseries.
Read the article here: https://doi.org/10.1016/j.scitotenv.2019.02.326
15 Jul 2019
Phosphate Removal from Nursery Runoff Water Using an Iron-Based Remediation System
Francisca Ordonez Hinz, Joseph P. Albano, and P. Chris Wilson (University of Florida)
Phosphorous (P) losses from containerized plant production nurseries can be significant due to the low nutrient retention capacities of the soilless media components. Many states, including Florida, are developing or have developed more stringent rules for limiting nutrient discharges into public waterbodies to improve water quality. Effective methods are needed to reduce amounts of P in runoff and drainage water. This study investigated the use of a small scale flow-through ferrous iron (Fe(II))-based remediation system for chemically precipitating P.
Read this research article here: https://doi.org/10.3390/w11040795