Environmental

Oral

397081 - In-situ remediation of Passaic River sediments using Ultrasound and Ozone nano-bubbles

Tuesday, June 5
4:00 PM - 5:30 PM
Location: Lakeshore B
Co-Authors: Shaini Aluthgun Hewage, New Jersey – New Jersey Institute of Technology; Jay Meegoda, New Jersey – New Jersey Institute of Technology

The Passaic River watershed is approximately 80 miles long and responsible of draining from 935 square miles of terrain on the northeastern New Jersey and southwestern New York. Mid 1940 marked the beginning of heavy chemical use in the lower 8 miles of the Passaic River with industries such as heavy metal extraction from ore and production of pesticides and herbicides. Between 1951 to 1969, the Diamond Alkali Company operated a chemical plant and manufactured the herbicides 2,4-dichlorophenoxyacetic acid (2,4-D), and 2,4,5- trichlorophenoxy-acetic acid (2,4,5-T). In 1984, the USEPA added the lower 8 miles of the Passaic River to the National Priorities List, making it eligible for cleanup funds under the federal Superfund program. The USEPA recently proposed a remediation plan that includes dredging and capping. The current remediation plan is extremely expensive and comprises risks of resuspension of contaminants. The aim of the study is to use Ultrasound and ozone nano bubbles to develop a treatment technology to remediate contaminated river sediments. The ultrasound provides agitation and soil decontamination due the shear forces generated induced cavitation and microstreaming from ultrasound energy. The ozone nano bubbles and radicals generated reacts with desorbed contaminants oxidize them to harmless byproducts. The nano-bubbles keep the water saturated with ozone. Once the treatment is completed, any remaining dissolved ozone will break into oxygen and will help to revitalize microbes and the eco-system. Laboratory experiments showed promising results indicating the possibility to use ozone nano bubbles and ultrasound to treat contaminated soil. The data obtained from the laboratory experiments will be used to develop a pilot scale study to identify the possibility of for possible field application of the technology.

Janitha Hewa Batagoda, New Jersey

Teaching Assistant
New Jersey Institute of Technology

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397081 - In-situ remediation of Passaic River sediments using Ultrasound and Ozone nano-bubbles



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