Efficacy of a large-scale constructed wetland to remove phosphorus and suspended solids from Lake Apopka, Florida

Dunne, E. J.; Coveney, Michael; Marzolf, Erich R.; Hoge, Victoria R.; Conrow, Roxanne; Naleway, Robert; Lowe, Edgar F.; Battoe, Lawrence E.

doi:10.1016/j.ecoleng.2012.01.019

Cited by 55 publications

(45 citation statements)

References 39 publications

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“…In contrast, the steady flow systems can be grab sampled for P content. For instance, the Apopka Wetland was sampled weekly [37]. Comparable procedures were followed at other systems.…”

Section: Timingmentioning

confidence: 99%

Large Constructed Wetlands for Phosphorus Control: A Review

Kadlec¹

2016

Water

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This paper reviews aspects of the performance of large (>40 ha) constructed treatment wetlands intended for phosphorus control. Thirty-seven such wetlands have been built and have good data records, with a median size of 754 ha. All are successfully removing phosphorus from a variety of waters. Period of record median concentration reductions were 71%, load reductions 0.77 gP¨m´2¨year´1, and rate coefficients 12.5 m¨year´1. Large wetlands have a narrower performance spectrum than the larger group of all sizes. Some systems display startup trends, ranging to several years, likely resulting from antecedent soil and vegetation conditions. There are internal longitudinal gradients in concentration, which vary with lateral position and flow conditions. Accretion in inlet zones may require attention. Concentrations are reduced to plateau values, in the range of about 10-50 mgP¨m´3. Vegetation type has an effect upon performance measures, and its presence facilitates performance. Trends in the performance measures over the history of individual systems display only small changes, with both increases and decreases occurring. Such trends remove little of the variance in behavior. Seasonality is typically weak for steady flow systems, and most variability appears to be stochastic. Stormwater systems display differences between wet and dry season behavior, which appear to be flow-driven. Several models of system performance have been developed, both steady and dynamic.

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“…In contrast, the steady flow systems can be grab sampled for P content. For instance, the Apopka Wetland was sampled weekly [37]. Comparable procedures were followed at other systems.…”

Section: Timingmentioning

confidence: 99%

Large Constructed Wetlands for Phosphorus Control: A Review

Kadlec¹

2016

Water

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“…There were no significant relationships between P fractions and Al, Fe, Mn and Ca contents. Though Fe and Al may contribute significantly to phosphorus bioavailability in soils by enhancing the cation-exchange capacity and reducing the phosphorus fixation (Zhang and Huang, 2007;Dunne et al, 2013). The TP, IP, HCl-P, and NaOH-P contents were no significantly correlated with SOM, except OP contents.…”

Section: Tpmentioning

confidence: 92%

Phosphorus distribution and sorption-release characteristics of the soil from newly submerged areas in the Danjiangkou reservoir, China

Song

Shan

Zou

et al. 2017

Ecological Engineering

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a b s t r a c tThe phosphorus (P) distribution and sorption-release characteristics of the surface soil in new submerged areas from the Danjiangkou Reservoir were investigated, and assessed the potential risk of P released from the soils. The results indicated that the TP (total phosphorus) contents in the soils varied from 161.01 mg/kg to 1150.94 mg/kg, and the mean content value of TP was the highest in arable land (732.91 mg/kg), especially distributed in arable land above 160 m elevation; Calcium bound phosphorus (HCl-P) was the major fraction of TP, the proportion was ranged from 60.77% to 83.38% for different land using types; the highest proportion of OP (organic phosphorus) was 32.07% in grass land soils. For all the samples, the rank order P-fractions was HCl-P > OP > NaOH-P (Phosphorus bound to Al and Fe oxides). Besides, the contents of TP correlated significantly with the HCl-P contents, (r = 0.936, P < 0.01), NaOH-P contents (r = 0.661, P < 0.01), OP contents (r = 0.762, P < 0.01), and IP contents (r = 0.970, P < 0.01), but OP contents was no significantly correlated with HCl-P, NaOH-P contents. The sorption capacity of soil ranged from 578.79 to 1457.44 mg/kg, and the amount of P released from the soils were ranged from 0.635 to 5.957 mg/kg; however, due to the concentration of P in the overlying water, about 80% of the newly submerged area would act as sink of P.

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“…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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Efficacy of a large-scale constructed wetland to remove phosphorus and suspended solids from Lake Apopka, Florida

Cited by 55 publications

References 39 publications

Large Constructed Wetlands for Phosphorus Control: A Review

Large Constructed Wetlands for Phosphorus Control: A Review

Phosphorus distribution and sorption-release characteristics of the soil from newly submerged areas in the Danjiangkou reservoir, China

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

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