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Analysis And Modeling Of Ultrasound To Decontaminate Heavy Metals In Dredged Sediments, Ruvini Perera
Analysis And Modeling Of Ultrasound To Decontaminate Heavy Metals In Dredged Sediments, Ruvini Perera
Theses
Sediments contaminated with heavy metals due to past disposal practices threatens the environment and requires remediation. This research is an attempt to develop a technology to decontaminate heavy metals in the dredged sediments with an integrated set of processes using ultrasound. Acoustic cavitation caused by ultrasound energy can be used to remove chromium from the sediments. Two coupled processes were used to treat both coarse (Process#1) and fine (Process#2) fractions of the sediments. Full factorial experimental designs were carried out to evaluate the treatment technique and to statistically model and optimize the processes. The model for Process#1 had four contributing …
Ultrasound To Decontaminate Organics In Dredged Sediments, Kanya Veerawat
Ultrasound To Decontaminate Organics In Dredged Sediments, Kanya Veerawat
Theses
In this research, it was attempted to decontaminate and separate dredged sediments contaminated with organic compounds by the application of ultrasound energy coupled with sub-atmospheric pressures. The decontamination and separation of contaminated sediments was achieved by integrated two processes. For Process 1, ultrasound energy was used to decontaminate the sandy fraction in dredged sediments, and sub-atmospheric pressure was used to separate and remove fines. For Process 2, ultrasound was again used to decontaminate fines with bulk fluid, and sub-atmospheric pressure was used to remove the contaminants with water. Process 1 was evaluated and found to have four variables contributing to …