Title

Evaluating the Effects of Waterjet Delivered Amendment on Benthic Organism

Presenter Information

Grace Harper

Department

Civil, Architectural and Environmental Engineering

Major

Geological Engineering

Research Advisor

Burken, Joel G. (Joel Gerard)
Elmore, A. Curt

Advisor's Department

Civil, Architectural and Environmental Engineering

Second Advisor's Department

Biological Sciences

Funding Source

Missouri S&T Opportunities for Undergraduate Research Experiences (OURE) Program; NIH

Abstract

The remediation of contaminated sediments is regularly performed through the addition of remediation amendments. The delivery of these amendments is typically executed through mechanical mixing methods, which can be devastating to the benthic communities living in these areas. This research tests the effects of a less invasive amendment delivery system on benthic organisms. A custom waterjet nozzle combined with a pressurized amendment vessel and a standard pressure washer are currently being investigated as a means to deliver remediation amendments into contaminated sediments. The waterjet delivery system was tested on a benthic organism surrogate as a means to evaluate the newly developed delivery systems impacts on these creatures, and Styrofoam coupons were used as the surrogate. The coupons were placed in different environments and the exiting stream from the waterjet delivery system was passed over each. The variables examined in this analysis included water pressure, distance from the jet to the surrogate, depth of surrogate burial in sand and/or water, and different nozzle degree angles. For animals capable of burrowing at least an inch, like mollusks, would be safe from harm unless the waterjet was being operated within two inches of the sediment.

Biography

Grace Harper is a sophomore in Geological Engineering from Wentzville, MO. She is actively involved with Engineers without Borders as the organization’s fundraising chair and Honduras team secretary. Her research interests are in remediation and she hopes to work in environmental clean up in the future.

Research Category

Engineering

Presentation Type

Oral Presentation

Document Type

Presentation

Location

Gasconade Room

Presentation Date

07 Apr 2010, 9:30 am - 10:00 am

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Apr 7th, 9:30 AM Apr 7th, 10:00 AM

Evaluating the Effects of Waterjet Delivered Amendment on Benthic Organism

Gasconade Room

The remediation of contaminated sediments is regularly performed through the addition of remediation amendments. The delivery of these amendments is typically executed through mechanical mixing methods, which can be devastating to the benthic communities living in these areas. This research tests the effects of a less invasive amendment delivery system on benthic organisms. A custom waterjet nozzle combined with a pressurized amendment vessel and a standard pressure washer are currently being investigated as a means to deliver remediation amendments into contaminated sediments. The waterjet delivery system was tested on a benthic organism surrogate as a means to evaluate the newly developed delivery systems impacts on these creatures, and Styrofoam coupons were used as the surrogate. The coupons were placed in different environments and the exiting stream from the waterjet delivery system was passed over each. The variables examined in this analysis included water pressure, distance from the jet to the surrogate, depth of surrogate burial in sand and/or water, and different nozzle degree angles. For animals capable of burrowing at least an inch, like mollusks, would be safe from harm unless the waterjet was being operated within two inches of the sediment.