Nutrient removal from eutrophic lake water by wetland filtration

Coveney, Michael; Stites, David L.; Lowe, Edgar F.; Battoe, Lawrence E.; Conrow, Roxanne

doi:10.1016/s0925-8574(02)00037-x

Cited by 158 publications

(86 citation statements)

References 15 publications

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“…Richardson & Qian (1999) suggested that the P concentration in the outflow increases exponentially after a P loading threshold (1 g/m 2 /yr) has been exceeded, though wetlands may serve the function of reducing P transport to downstream water bodies even at higher loads than this. To be able to manage such wetlands for a sustained P retention, it is important to identify the dominant retention processes, whether it is sediment sorption of dissolved P (Bruland & Richardson, 2006), sedimentation of particulate P (Braskerud, 2002;Coveney et al, 2002;Koskiaho et al 2003) or biological P uptake, or a combination of all.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

2011

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A constructed wetland (2.1 ha; 2% of catchment area) in southeast Sweden, in a catchment with 35% arable land on clay soils, was investigated with respect to phosphorus (P) retention, focusing on particulate P (PP) and sediment accretion. The aims were to i) estimate P retention and identify the dominating retention processes; ii) investigate how well estimates of P retention based on inflow-outflow measurements compared with the amount of P accumulated in the sediment.In-and outflow of P was measured during four years with continuous flow measurements and flow proportional weekly composite samples. P in the accumulated sediment was estimated based on core samples and analyzed using sequential fractionation. Total P load during four years was 65 kg/ha and intensive sampling events detected 69% as PP. Based on inflow-outflow estimates the mean P retention was 2.8 kg/ha/yr, or 17%, but the amount of P accumulated in the inlet zone equated 78% of the TP load. This discrepancy showed the need to add studies of sediment accumulation to inflow-outflow estimates for an improved understanding of the P retention.The dominating P forms in the sediment were organic P (38%) and P associated with iron or aluminum (39%), i.e. potentially mobile forms. In areas colonized by Typha latifolia, the amount of P in the upper sediment layer (390 kg) was more than double the total P load of 136 kg.Cycling and release in those areas is a potential source of P that deserves further attention.3

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Section: Introductionmentioning

confidence: 99%

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

2011

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“…being the most common plant. Among the studies of FWSCWs treating eutrophic water, the following macrophytes were planted or were allowed to grow naturally: T. latifolia, Hydrocotyle ranunculoides, P. cordata, S. lancifolia, Alternanthera philoxeroides, Salix caroliniana and Ludwigia peruviana (Coveney et al, 2002 ), as well as Typha angustifolia (Li et al, 2008 ).…”

Section: Aq2mentioning

confidence: 99%

“…In a few cases, this technology is applied to treat eutrophic waters, but its use to restore lakes and rivers, as observed by Mitsch ( 1995 ), has increased over recent years (Coveney et al, 2002; Li et al, 2008; Dunne et al, 2012. This is the case for the Tancat de la Pipa constructed wetland (TPCW), which is aimed at treating eutrophic water, within the Albufera de Valencia (Spain) natural park (Martín et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Comparison of three plants in a surface flow constructed wetland treating eutrophic water in a Mediterranean climate

et al. 2015

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The goal of this study is to examine the suitability of three plants, Typha spp., Phragmites spp. and Iris pseudacorus, in a free water surface constructed wetland created to treat eutrophic water from Lake Albufera (Valencia, Spain), a wetland of international importance. The growth, coverage and nutrient content of the three plants were studied, and chemical analyses were performed according to standard methods. The maximum standing crops measured for each plant were 1.9, 18.2 and 3.3 kg m , respectively, and their average nutrient concentrations were 2.1, 1.2 and 1.7 g P kg and 12.1, 11.7 and 10.1 g N kg , respectively. A multiple harvest of Iris pseudacorus revealed that the removal of nutrients could be increased up to 50% for N and 100% for P compared with a single harvest. Biomass decomposition assays showed high values for five day biochemical oxygen demand (115-207 mg O g , depending on the plant and its age) and a substantial release of phosphorus, up to 100% of that contained in the biomass, highlighting

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“…Several researchers have shown that littoral zones can effectively attenuate nutrients in ground and surface water [26] and that littoral wetlands can effectively trap and digest nutrients from external sources [27][28][29]. The spatial change of nutrients showed that surface runoff was the source of nutrients coming into Baiyangdian wetlands.…”

Section: The Purification Mechanisms Of Littoral Zonesmentioning

confidence: 99%

Sedimentary Enzyme Kinetics of Land/Water Ecotones with Reed Domination

Wang

Yin²,

Wang

2010

CLEAN Soil Air Water

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Land/water ecotones, the transitional boundary zone between terrestrial and aquatic ecosystems, can effectively trap and assimilate nutrients from external sources. The changes of nutrient cycling will cause a response in enzyme activity. In this paper, the enzyme kinetics of land/water ecotones in a shallow eutrophic wetland in China, dominated by a reed (Phragmites australis) community, are studied. The results indicate that land/water ecotones exhibit a strong filtration function and nutrient factor is an important feature affecting the distribution of enzymes in the transect of the littoral zone. The obvious spatial differences of enzyme activities and nutrients are present in the transect of the reed beds. The land area is the hot zone, where significant changes in enzyme activity occur. T-test results show that the landward spot, 1 m away from the water-land interface, is quite different from other spots, and the 1 m spot is the hot spot where great biochemical change happens. The principal component analysis of the environmental variables shows that nutrient factors have an important affect on enzyme distribution in the transect of the littoral zone. The nutrient factor explains about 54% of the observed variance. In particular, TOC (total organic carbon) correlates with the other five factors (TN; total nitrogen, TP; total phosphorus, phosphatase, b-glucosidase, and urease) with correlative coefficients of 0.932, 0.595, 0.488, 0.433, and -0.468, respectively. The results indicate that TOC is a very important factor in Baiyangdian wetlands.

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Nutrient removal from eutrophic lake water by wetland filtration

Cited by 158 publications

References 15 publications

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

Efficiency of a constructed wetland for retention of sediment-associated phosphorus

Comparison of three plants in a surface flow constructed wetland treating eutrophic water in a Mediterranean climate

Sedimentary Enzyme Kinetics of Land/Water Ecotones with Reed Domination

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