Management of Ammoniacal Nitrogen in Stormwater Runoff

dc.contributor.advisorDavis, Allen Pen_US
dc.contributor.authorKhorsha, Golnazen_US
dc.contributor.departmentCivil Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2017-01-25T06:30:29Z
dc.date.available2017-01-25T06:30:29Z
dc.date.issued2016en_US
dc.description.abstractNitrogen in stormwater runoff plays a dominant role in the eutrophication of receiving waters. The challenge in treating nitrogen lies in its diverse speciation and biological cycling. This work aimed to improve removal of influent and mineralized ammonium through the use of sorption media and nitrification in preparation for subsequent denitrification. Two media, clinoptilolite (ZT) and hydrous-aluminosilicate (CA), were characterized in a series of batch and sorption column experiments, which indicated superior performance of ZT because of its higher capacity (206 months life-expectancy) and faster kinetics (60 min). Competition with Ca2+ and K+ resulted in smaller and slower sorption for both media. Removed ammonium in ZT was highly extractable, signifying its potential bioavailability. Sorption columns exhibited high removal during influent NH4+ increases, desorption with influent concentration drops, and lower ammonium removal upon rewetting/saturateting. Nitrification in bio-active sorptive media enhanced removal efficiency, particularly for alternating wet/saturated-dry/unsaturated conditions, with smaller desorption occurring. ZT application in filtration-based stormwater control measures is recommended.en_US
dc.identifierhttps://doi.org/10.13016/M2M533
dc.identifier.urihttp://hdl.handle.net/1903/19032
dc.language.isoenen_US
dc.subject.pqcontrolledEngineeringen_US
dc.subject.pqcontrolledEnvironmental engineeringen_US
dc.subject.pquncontrolledammoniumen_US
dc.subject.pquncontrolledeutrophicationen_US
dc.subject.pquncontrollednitrogenen_US
dc.subject.pquncontrolledrunoffen_US
dc.subject.pquncontrolledsorptionen_US
dc.subject.pquncontrolledStormwateren_US
dc.titleManagement of Ammoniacal Nitrogen in Stormwater Runoffen_US
dc.typeDissertationen_US

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