Nitrate-N removal rate variabilities in floating treatment wetland mesocosms with diverse planting and carbon amendment designs

Tiffany L. Messer; Daniel N. Miller; Helen Little; Kenneth Oathout

doi:10.1016/j.ecoleng.2021.106444

Nitrate-N removal rate variabilities in floating treatment wetland mesocosms with diverse planting and carbon amendment designs

Tiffany L. Messer, Daniel N. Miller, Helen Little, Kenneth Oathout

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Floating treatment wetlands are an innovative wetland design to passively improve water quality and remove pollutants from reservoirs with limited infrastructure modification or construction as compared to traditional treatment wetlands. However, design recommendations remain limited. Therefore, the objectives of this study were: 1. Determine nitrate-N removal rates in two floating treatment wetland vegetation designs entering a second growing season and 2. Evaluate nitrate-N removal performance in floating treatment wetland designs following the addition of two carbon amendments during the growing season. Three floating treatment wetland mesocosm experiments were conducted during the summer of 2019, where nitrate-N removal was evaluated. Two floating treatment wetland plant designs (Rush species and Diverse species) and three carbon conditions (no amendment, spent coffee grounds, and barley straw) were assessed in replicates of three. Floating treatment wetland vegetation design (Rush versus Diverse) was found to have significant (P < 0.05) effects on nitrate-N removal performance with Diverse floating treatment wetlands removing nitrate-N at more than twice the rate of Rush floating treatment wetlands (491 to 695 mg N m⁻² d⁻¹ and 1547 to 1937 mg N m⁻² d⁻¹, respectively). However, impacts of nitrate-N removal following carbon amendments were insignificant compared to no amendment Controls. Diverse wetland species should be considered in floating treatment wetland design while alternative methods to add carbon amendments to floating treatment wetland mats should be further explored.

Original language	English
Article number	106444
Journal	Ecological Engineering
Volume	174
DOIs	https://doi.org/10.1016/j.ecoleng.2021.106444
State	Published - Jan 2022

Bibliographical note

Funding Information:
This project was supported with funds by the Daughtery Water for Food Global Institute at the University of Nebraska-Lincoln. Further, this project was based on research partially supported by the Nebraska Agricultural Experiment Station with funding from the Hatch capacity funding program (Accession No. 1014685 ), Hatch multistate capacity funding grant ( W-4045 ), and of the USDA National Institute of Food and Agriculture . Special thanks to Julia Lindgren, Jessica Satiroff, Brittany Trejo, Samantha Perez, Trevor Kaslon, and Garrett Isom for their support on this project. A special thanks to the reviewers of Ecological Engineering for their comments and feedback.

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

Dissolved oxygen
Floating Treatment Wetlands
Nitrate-N
Water Quality

ASJC Scopus subject areas

Environmental Engineering
Nature and Landscape Conservation
Management, Monitoring, Policy and Law

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10.1016/j.ecoleng.2021.106444

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title = "Nitrate-N removal rate variabilities in floating treatment wetland mesocosms with diverse planting and carbon amendment designs",

abstract = "Floating treatment wetlands are an innovative wetland design to passively improve water quality and remove pollutants from reservoirs with limited infrastructure modification or construction as compared to traditional treatment wetlands. However, design recommendations remain limited. Therefore, the objectives of this study were: 1. Determine nitrate-N removal rates in two floating treatment wetland vegetation designs entering a second growing season and 2. Evaluate nitrate-N removal performance in floating treatment wetland designs following the addition of two carbon amendments during the growing season. Three floating treatment wetland mesocosm experiments were conducted during the summer of 2019, where nitrate-N removal was evaluated. Two floating treatment wetland plant designs (Rush species and Diverse species) and three carbon conditions (no amendment, spent coffee grounds, and barley straw) were assessed in replicates of three. Floating treatment wetland vegetation design (Rush versus Diverse) was found to have significant (P < 0.05) effects on nitrate-N removal performance with Diverse floating treatment wetlands removing nitrate-N at more than twice the rate of Rush floating treatment wetlands (491 to 695 mg N m−2 d−1 and 1547 to 1937 mg N m−2 d−1, respectively). However, impacts of nitrate-N removal following carbon amendments were insignificant compared to no amendment Controls. Diverse wetland species should be considered in floating treatment wetland design while alternative methods to add carbon amendments to floating treatment wetland mats should be further explored.",

keywords = "Dissolved oxygen, Floating Treatment Wetlands, Nitrate-N, Water Quality",

author = "Messer, {Tiffany L.} and Miller, {Daniel N.} and Helen Little and Kenneth Oathout",

note = "Funding Information: This project was supported with funds by the Daughtery Water for Food Global Institute at the University of Nebraska-Lincoln. Further, this project was based on research partially supported by the Nebraska Agricultural Experiment Station with funding from the Hatch capacity funding program (Accession No. 1014685 ), Hatch multistate capacity funding grant ( W-4045 ), and of the USDA National Institute of Food and Agriculture . Special thanks to Julia Lindgren, Jessica Satiroff, Brittany Trejo, Samantha Perez, Trevor Kaslon, and Garrett Isom for their support on this project. A special thanks to the reviewers of Ecological Engineering for their comments and feedback. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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AU - Messer, Tiffany L.

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AU - Little, Helen

AU - Oathout, Kenneth

N1 - Funding Information: This project was supported with funds by the Daughtery Water for Food Global Institute at the University of Nebraska-Lincoln. Further, this project was based on research partially supported by the Nebraska Agricultural Experiment Station with funding from the Hatch capacity funding program (Accession No. 1014685 ), Hatch multistate capacity funding grant ( W-4045 ), and of the USDA National Institute of Food and Agriculture . Special thanks to Julia Lindgren, Jessica Satiroff, Brittany Trejo, Samantha Perez, Trevor Kaslon, and Garrett Isom for their support on this project. A special thanks to the reviewers of Ecological Engineering for their comments and feedback. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2022/1

Y1 - 2022/1

N2 - Floating treatment wetlands are an innovative wetland design to passively improve water quality and remove pollutants from reservoirs with limited infrastructure modification or construction as compared to traditional treatment wetlands. However, design recommendations remain limited. Therefore, the objectives of this study were: 1. Determine nitrate-N removal rates in two floating treatment wetland vegetation designs entering a second growing season and 2. Evaluate nitrate-N removal performance in floating treatment wetland designs following the addition of two carbon amendments during the growing season. Three floating treatment wetland mesocosm experiments were conducted during the summer of 2019, where nitrate-N removal was evaluated. Two floating treatment wetland plant designs (Rush species and Diverse species) and three carbon conditions (no amendment, spent coffee grounds, and barley straw) were assessed in replicates of three. Floating treatment wetland vegetation design (Rush versus Diverse) was found to have significant (P < 0.05) effects on nitrate-N removal performance with Diverse floating treatment wetlands removing nitrate-N at more than twice the rate of Rush floating treatment wetlands (491 to 695 mg N m−2 d−1 and 1547 to 1937 mg N m−2 d−1, respectively). However, impacts of nitrate-N removal following carbon amendments were insignificant compared to no amendment Controls. Diverse wetland species should be considered in floating treatment wetland design while alternative methods to add carbon amendments to floating treatment wetland mats should be further explored.

AB - Floating treatment wetlands are an innovative wetland design to passively improve water quality and remove pollutants from reservoirs with limited infrastructure modification or construction as compared to traditional treatment wetlands. However, design recommendations remain limited. Therefore, the objectives of this study were: 1. Determine nitrate-N removal rates in two floating treatment wetland vegetation designs entering a second growing season and 2. Evaluate nitrate-N removal performance in floating treatment wetland designs following the addition of two carbon amendments during the growing season. Three floating treatment wetland mesocosm experiments were conducted during the summer of 2019, where nitrate-N removal was evaluated. Two floating treatment wetland plant designs (Rush species and Diverse species) and three carbon conditions (no amendment, spent coffee grounds, and barley straw) were assessed in replicates of three. Floating treatment wetland vegetation design (Rush versus Diverse) was found to have significant (P < 0.05) effects on nitrate-N removal performance with Diverse floating treatment wetlands removing nitrate-N at more than twice the rate of Rush floating treatment wetlands (491 to 695 mg N m−2 d−1 and 1547 to 1937 mg N m−2 d−1, respectively). However, impacts of nitrate-N removal following carbon amendments were insignificant compared to no amendment Controls. Diverse wetland species should be considered in floating treatment wetland design while alternative methods to add carbon amendments to floating treatment wetland mats should be further explored.

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KW - Nitrate-N

KW - Water Quality

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Nitrate-N removal rate variabilities in floating treatment wetland mesocosms with diverse planting and carbon amendment designs

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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