Thesis
Highway stormwater media filter drains: evaluation of intensive accelerated loading on modified design
Washington State University
Master of Science (MS), Washington State University
2016
Handle:
https://hdl.handle.net/2376/102001
Abstract
Stormwater from highways contains high concentrations of heavy metals including zinc and copper ions. One of the recommended Best Management Practice (BMP) used to prevent high concentrations of copper and zinc from entering into bodies of water are Media Filter Drains (MFDs). Two types of MFDs were tested: samples from sites in Western Washington (Thomas 2013) and laboratory developed media mix (Freimund 2013). Eight 6-inch diameter columns with 12-inch depths were used. Four contained the existing media and the other four contained the new lab mixed media. Experiments on existing Western Washington samples were conducted to review contaminant removal of MFDs to predict lifespan. Experiments on the new media mix were also done to review removal rates to predict lifespan and determine a functional adsorption rate for MFD designers. To perform these tests, concentrated accelerated aging events with synthetic stormwater were used to determine that existing and new media have lifespans exceeding 30 and 20 years, respectively, with no signs poor removal. Variations of infiltration rates were applied to find a consistent adsorption rate. Residence and infiltration based times were graphed using zero, first, and second order reactions. For copper and zinc, first order reactions using infiltration based times were most accurate. To evaluate the quality of data, values from previous studies including Freimund (2013) were applied. First order reaction is useful for high concentrations of copper and zinc ions and large storm situations. Average removal rates of copper and zinc at typical concentrations were 68.1% and 91.6% respectively. Average removal rates of copper and zinc at very high concentrations were 99.1% and 99.3% respectively.
Metrics
4 File views/ downloads
10 Record Views
Details
- Title
- Highway stormwater media filter drains
- Creators
- Justin Raj Rath
- Contributors
- Liv Haselbach (Degree Supervisor)
- 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] :
- Identifiers
- 99900525075601842
- Language
- English
- Resource Type
- Thesis