Estimation of nitrogen dynamics in a vertical-flow constructed wetland

Plant Species Richness Affected Nitrogen Retention and Ecosystem Productivity in a Full‐Scale Constructed Wetland

“…Meanwhile, the slope of the positive regression between substrate nitrate concentration and SR became steeper in 2008 as compared with that in 2007 (Fig. 2a, [16]), suggesting that microbial composition and their functioning had large interannual variations [25] and that microbial nitrate (belowground biomass) production increased with the growth of plants [29,30]. Our finding is consistent with the literature reporting higher nitrification rates in communities with higher plant SR [1,22].…”

“…Meanwhile, nitrate concentrations in the substrate increased and ammonium concentrations decreased from 2007 to 2008 after the establishment of the experiment (Fig. 3a), indicating that nitrification in plant rhizome became stronger over time in the CW with high nutrient input [25]. Nitrification depends primarily on ammonium concentration and activities of nitrifiers in the substrate [17,21,26].…”

Water-related ecosystem services provided by urban green space: A case study in Yixing City (China)

“…However, other studies have shown that grassy swales are effective in the reduction of the concentrations of most constituents including nitrate-nitrogen and TP in highway runoff, which because the low runoff coefficient due to infiltration of runoff into the swale produces a large reduction in pollutant load discharged (Barrett et al, 1998). Studies have showed that increased runoff retention time in the green space can make biological processes for pollutant remediation/transformation completion, so that the pollutants in the runoff are removed efficiently (Amado, Albuquerque, & Espírito Santo, 2012;Ouyang, Luo, & Cui, 2011;Yang et al, 2013). Results from both column and field-scale studies of pollutant removal in rain gardens show that nitrogen and phosphate are removed efficiently when increased retention time of runoff pollutants (determined by design configuration, rainfall volume, intensity, and interval) and water-saturated conditions (Yang et al, 2010(Yang et al, , 2013.…”

Purification efficiencies and microbial community structure of integrated vertical-flow constructed wetland for domestic wastewater treatment during acclimation period

“…Therefore, before a new constructed wetland system is formally put into operation, an acclimation period is required to allow the system to perform properly [15][16][17]. Nevertheless, most references have been focused on the constructed wetland's mature operation period; systematic studies on purifi cation eff ects during acclimation period were rarely reported [18].…”