Next Article in Journal
Models, Simulations and Games for Water Management: A Comparative Q-Method Study in The Netherlands and China
Previous Article in Journal
Assessing Impacts of Land Use Changes on the Hydrology of a Lowland Rainforest Catchment in Ghana, West Africa
Previous Article in Special Issue
Adapting the Relaxed Tanks-in-Series Model for Stormwater Wetland Water Quality Performance
Open AccessFeature PaperArticle

Design and Season Influence Nitrogen Dynamics in Two Surface Flow Constructed Wetlands Treating Nursery Irrigation Runoff

Department of Plant and Environmental Sciences, Clemson University, Clemson, SC 29637-0310, USA
Water 2018, 10(1), 8; https://doi.org/10.3390/w10010008
Received: 1 November 2017 / Revised: 18 December 2017 / Accepted: 20 December 2017 / Published: 23 December 2017
(This article belongs to the Special Issue Treatment Wetlands for Nutrient Removal)
Constructed wetlands (CWs) are used to remediate runoff from a variety of agricultural, industrial, and urban sources. CW remediation performance is often evaluated at the laboratory scale over durations less than one year. The purpose of this study was to characterize the effect of CW design (cell depth) and residence time on nitrogen (N) speciation and fate across season and years in two free water surface wetlands receiving runoff from irrigated plant production areas at an ornamental plant nursery. Water quality (mg·L−1 of nitrate, nitrite, and ammonium, dissolved oxygen and oxidation reduction potential) was monitored at five sites within each of two CWs each month over four years. Nitrate-N was the dominant form of ionic N present in both CWs. Within CW1, a deep cell to shallow cell design, nitrate comprised 86% of ionic N in effluent. Within CW2, designed with three sequential deep cells, nitrate comprised only 66% of total N and ammonium comprised 27% of total N in CW2 effluent. Differences in ionic N removal efficacies and shifts in N speciation in CW1 and CW2 were controlled by constructed wetland design (depth and hydraulic retention time), the concentration of nutrients entering the CW, and plant species richness. View Full-Text
Keywords: nitrogen remediation; nitrite; nitrate; ammonium; deep zone; plant species richness nitrogen remediation; nitrite; nitrate; ammonium; deep zone; plant species richness
Show Figures

Figure 1

MDPI and ACS Style

White, S.A. Design and Season Influence Nitrogen Dynamics in Two Surface Flow Constructed Wetlands Treating Nursery Irrigation Runoff. Water 2018, 10, 8.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop