Peristaltic Pump Autosamplers for Solids Measurement in Stormwater Runoff
| Autor: | Robert Pitt, Christopher D. Roenning, Christina Y. S. Siu, Daniel P. Treese, Shirley E. Clark |
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| Rok vydání: | 2009 |
| Předmět: |
Hydrology
Suspended solids Rain Ecological Modeling Stormwater Environmental engineering Sampling (statistics) Peristaltic pump Equipment Design Silicon Dioxide Waste Disposal Fluid Pollution Water Movements Environmental Chemistry Environmental science Particle Particulate Matter Water Pollutants Particle size Sample collection Particle Size Surface runoff Waste Management and Disposal Water Science and Technology |
| Zdroj: | Water Environment Research. 81:192-200 |
| ISSN: | 1061-4303 |
| DOI: | 10.2175/106143008x325737 |
| Popis: | Regulatory agencies approve automatic samplers containing peristaltic pumps as a sample collection method for stormwater characterization and for treatment-device evaluation. Autosampler performance, as discussed in the limited available literature, can vary across the entire particle size range typically found in stormwater from different source areas and outfalls-reasonably consistent performance for particle sizes250 microm, but much less consistency for particles250 microm. Therefore, a series of experiments was undertaken to quantify the upper range of consistent particle capture that may occur with sampling stormwater suspended sediment and particulate-bound pollutants. These experiments, based on triplicate sampling at each experimental condition, found that peristaltic pump autosamplers commonly used in stormwater monitoring could not repeatedly and effectively capture particles250 microm from a simulated stormwater whose particles have a specific gravity of 2.65. It was expected that the effective size for autosamplers would be correspondingly larger for particles having smaller specific gravities. The height of the sampler had no influence on particle recovery up to a height of 2.5 m, with slightly decreasing recoveries of large particles occurring at greater heights, as a result of reduced sampler intake velocity. Therefore, to characterize the solids across the entire size range and specific gravities that may occur in stormwater runoff, autosamplers should be deployed in conjunction with bedload and floatables sampling. |
| Databáze: | OpenAIRE |
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