Date of Award

Spring 4-24-2020

Semester of Degree

May

Document Type

Open Access Thesis

Degree Name

M.S. in Environmental Resources Engineering

Department

Environmental Resources Engineering

Major Professor

Douglas Daley

Steering Committee Member

Russell Briggs

Steering Committee Member

John Dunkle

Abstract

A pilot-scale 3 by 3 factorial experiment tested three soil organic matter fractions (1.6%, 4.6% and 6.9%) and three depths (18-inch, 30-inch and 48-inch) to determine the effectiveness of an engineered biofiltration soil medium for removal of nitrogen, phosphorus, copper, and zinc from synthetic stormwater. Greater depth is used as an analog for longer hydraulic retention time. Mean total dissolved nitrogen removal efficiency was very low (ranging from -9% to 31% amongst treatments) with a mean removal efficiency of 12% (s = 30%), indicating the need for additional measures to enhance nitrogen removal. Total dissolved phosphorus, dissolved copper, and dissolved zinc were removed effectively by all soil treatments, with mean removal efficiencies of 82% (s = 19%), 79% (s = 8%), and 98% (s = 1%), respectively.

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