Thesis
Assessment of copper and zinc adsorption to lignocellulosic filtration media using laboratory and field scale column tests for the purpose of urban stormwater remediation
Washington State University
Master of Science (MS), Washington State University
12/2015
Handle:
https://hdl.handle.net/2376/101774
Abstract
Practical engineering solutions to address growing municipal stormwater issues are needed to maintain a healthy relationship between humans and the environment. In the Pacific Northwest, elevated soluble zinc and copper concentrations originating from urban stormwater runoff provide a significant threat to native salmon and steelhead populations. In response to urbanization, existing stormwater infrastructure needs to be upgraded to treat non‐point source pollution, including soluble metals, prior to entering the receiving water. Media filtration BMPs provide the flexibility and small footprint needed for retrofit applications that are space limited, such as ferry terminal staging areas. An effective yet low‐cost filtration media needs to be identified to remove soluble metals of concern from urban runoff. Laboratory and field scale continuous flow column studies were performed on torrefied and non‐torrefied Douglas‐fir wood crumbles, charcoal, and pea gravel to evaluate their effectiveness at sorbing soluble copper and zinc. The Bainbridge Island ferry terminal staging area was selected as the field test site. Laboratory column tests indicated that the most efficient adsorption media in relation to both metals was non‐torrefied wood, followed in order by pea gravel, torrefied wood, and charcoal. High stormwater flow tests performed in the laboratory on charcoal and torrefied wood columns resulted in no statistically significant difference in effluent metal concentrations. A deicer flush performed on torrefied wood and charcoal columns following adsorption tests resulted in a significant increase in effluent metal concentration. The field test column containing charcoal averaged respective percent soluble zinc, soluble copper and total suspended solids removal of 41%, ‐17%, and 54%.
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Details
- Title
- Assessment of copper and zinc adsorption to lignocellulosic filtration media using laboratory and field scale column tests for the purpose of urban stormwater remediation
- Creators
- Vincent Paul McIntyre
- Contributors
- David Yonge (Chair)RICHARD J WATTS (Committee Member)Michael P Wolcott (Committee Member) - Washington State University, Office of Clean Technology
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Number of pages
- 97
- Identifiers
- 99900525171801842
- Language
- English
- Resource Type
- Thesis