Variability in adsorptive phosphorus removal by structural stormwater best management practices

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dc.contributor.authorRosenquist, Shawn E.en
dc.contributor.authorHession, W. Cullyen
dc.contributor.authorEick, Matthew J.en
dc.contributor.authorVaughan, David H.en
dc.contributor.departmentBiological Systems Engineeringen
dc.date.accessioned2017-11-14T17:49:23Zen
dc.date.available2017-11-14T17:49:23Zen
dc.date.issued2009-12-09en
dc.description.abstractVarious best management practices (BMPs) utilizing sorption processes (SP) have demonstrated effectiveness for phosphorus (P) management in stormwater. However, the widespread use of these BMPs in urban areas has been limited by large land requirements and limited P removal capacity. Central to this study is the development of the urban wetland filter (UWF), a concept intended to overcome these limitations and provide a low-cost, easily implemented BMP that can meet urban P-management goals. Performance variation along with finite sorption capacity has limited the reliability of SP as a primary removal strategy. However, if variability were better understood and capacity made renewable, sorption of P to substrates could provide the option of a more rapid and (with less required retention time) more space-efficient sustainable removal strategy than biological uptake. The goal of this study was to identify and model major sources of variability in P removal by sorption, enabling better prediction and optimization of sorption performance and ultimately the development of a small-footprint stormwater BMP with efficient P removal ability. Experiments were conducted in bench-scale reactors with an iron-oxide sand substrate. Results included a physical-process model developed by considering the thermodynamic and kinetic properties of SP. Significant sources of variability included, by order of importance, magnitude of a solution/substrate concentration gradient, length of the “antecedent dry period” between loadings, and pH. Most importantly, results indicate the critical importance of a thermodynamic gradient between solution P and previously adsorbed P to achieve continued removal.en
dc.description.sponsorshipThe authors would like to thank the National Science Foundation for providing support for students who worked on the project as a part of the NSF Research Experiences for Undergraduates grant.en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1016/j.ecoleng.2009.12.008en
dc.identifier.urihttp://hdl.handle.net/10919/80381en
dc.identifier.volume36en
dc.language.isoenen
dc.publisherElsevieren
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPhosphorusen
dc.subjectWetlandsen
dc.subjectNutrientsen
dc.subjectBMPen
dc.subjectEutrophicationen
dc.subjectUrbanen
dc.subjectStormwateren
dc.titleVariability in adsorptive phosphorus removal by structural stormwater best management practicesen
dc.title.serialEcological Engineeringen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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Destination Area: Global Systems Science (GSS)
Scholarly Works, Biological Systems Engineering