Impact of seasonal climate variability on constructed wetland treatment efficiency

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 72, P. 107350 - 107350

Published: March 13, 2025

Language: Английский

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Decline in Water Treatment Efficiency of an Estuarine Constructed Wetland over Its Operating Years

Water, Journal Year: 2025, Volume and Issue: 17(3), P. 352 - 352

Published: Jan. 26, 2025

Estuarine constructed wetlands (ECWs) play a role as ecological barriers in the control of external pollution lakes. Usually, ECWs show reduced water treatment efficiency after many years operation compared to their initial performance. However, it is unclear how purification an ECW changes over time. After decade tracking analysis on ECW, this study found that indeed played significant achieving quality improvement effects. The average removal rates for total nitrogen (TN) and phosphorus (TP) permanganate index (CODMn) were 36.2%, 26.7%, 30.7%, respectively, with annual reductions 1.6 t/a, 20.8 44.6 t/a. surface hydraulic load critical indicator design operational management ECWs. reduction loads TP, TN, CODMn increased rise load, indicating project had certain advantages treating large-volume bodies. when strict needed, should be reduced. During high-efficiency period (2010–2015), effects TN TP more than twice those during degradation (2016–2021), effect was about 1.5 times greater. With years, rate declined most rapidly due pollutant accumulation sediment release.

Language: Английский

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Recommended parameter combination of free water surface flow constructed wetlands based on seasonal fluctuation of hydraulic performance and purification effect

Ecological Engineering, Journal Year: 2025, Volume and Issue: 212, P. 107541 - 107541

Published: Jan. 31, 2025

Language: Английский

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Assessing the factors influencing constructed wetland performance for mitigating agricultural nutrient runoff in the U.S.

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 71, P. 107293 - 107293

Published: Feb. 22, 2025

Language: Английский

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Enhancement of nitrogen removal in constructed wetlands through boron mud and elemental sulfur addition: Regulation of sulfur and oxygen cycling

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154544 - 154544

Published: Aug. 3, 2024

Language: Английский

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Synergistic Removal of Nitrogen and Phosphorus in Constructed Wetlands Enhanced by Sponge Iron

Water, Journal Year: 2024, Volume and Issue: 16(10), P. 1414 - 1414

Published: May 16, 2024

Insufficient denitrification and limited phosphorus uptake hinder nitrogen removal in constructed wetlands (CWs). Sponge iron is a promising material for the of because its strong reducing power, high electronegativity, inexpensive cost. The influence factors including initial solution pH, dosage, Fe/C ratio was investigated. A vertical flow CW with sponge (CW-I) established, traditional gravel bed (CW-G) used as control group. kinetic analysis demonstrated that both phosphorus, pseudo-second-order kinetics were superior. theoretical adsorption capacities nitrate (NO3−-N) phosphate (PO43−-P) 1294.5 mg/kg 583.6 mg/kg, respectively. Under different hydraulic retention times (HRT), CW-I had better total (TN) (TP) efficiencies (6.08–15.18% 5.00–20.67%, respectively) than CW-G. enhancing effect on best when HRT 48 h. increase improved not only effects CWs but also reduction capacity effect. main mechanisms synergistic chemical reduction, ion exchange, electrostatic adsorption, precipitation formation.

Language: Английский

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Simplification and simulation of evaluation process for low efficiency constructed wetlands based on principal component analysis and machine learning

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 955, P. 176873 - 176873

Published: Oct. 16, 2024

Language: Английский

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Sustainable carbon retention from water input to wetlands at two temporal scales

CATENA, Journal Year: 2024, Volume and Issue: 245, P. 108319 - 108319

Published: Aug. 17, 2024

Language: Английский

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From Literature to Action: Analyzing How Nitrogen and Phosphorus Removal Responds to Different Design Factors in Free Water Surface Constructed Wetlands

ACS ES&T Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 28, 2024

Despite the increasing number of studies on nitrogen (N) and phosphorus (P) removal in free water surface (FWS) wetland systems, there is still a gap understanding influence design variables system performance. To address this, we conducted global meta-analysis 73 employing advanced statistical techniques, kinetic models, machine learning along with variable importance analysis. The results indicated that random forest (R2 = 0.55–0.77) artificial neural network 0.5–0.85) were best fitting models for TN TP pilot-scale large-scale systems. Moreover, permutation using different inflow concentration, plant coverage, hydraulic loading rate, area are considered most important N P under conditions, while retention time, depth deemed conditions. Furthermore, was higher (54.6% 56.7%) systems compared to (29.0% 41.9%) Also, interactions between process investigated better understand specific roles these improving

Language: Английский

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Stormwater Treatment in Constrained Urban Spaces Through a Hybrid Sequential Sedimentation Biofiltration System

Published: Jan. 1, 2024

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Language: Английский

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