The treatment of radioactive wastewater by ultrasonic standing wave method.
The radiation hazards of radionuclide arising from the storage of nuclear weapons cannot be ignored to the operators. Ultrasonic standing wave methods can be considered as the green cleaning separation techniques with high efficiency. The application of ultrasonic standing wave methods for liquid radioactive wastes treatment requires solving many problems connected with the proper selection of the frequency and power of ultrasonic transducers, and the processing time, etc. Based on the model of one single suspended radioactive particle subjected to in the field of ultrasonic standing wave, the principle of the treatment of low-level radioactive wastewater by ultrasound was analyzed. The theoretical and simulation results show that under the action of ultrasonic standing wave, the particle will move toward the wave node plane, and the time of particle reaching the plane become shorter when the radius of particle and the frequency and power of ultrasound was enlarged. The experimental results show that the radioactive concentration of wastewater could be reduced from 400 Bq L(-1) to 9.3 Bq L(-1) and the decontamination efficiency was 97.68%. The decontamination efficiency could not be obviously improved by further increasing the treating time.
Xi'an Hi-Tech Institute, Xi'an 710025, China. Electronic address: hsxljj@sina.com.
Hou
H
Su-Xia
Xi'an Hi-Tech Institute, Xi'an 710025, China.
Luo
L
Ji-Jun
Xi'an Hi-Tech Institute, Xi'an 710025, China.
He
H
Bin
Xi'an Hi-Tech Institute, Xi'an 710025, China.
Li
L
Ru-Song
Xi'an Hi-Tech Institute, Xi'an 710025, China.
Shen
S
Tao
D014465:Ultrasonics / Q000379:methods*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D014875:Water Pollutants, Radioactive
D062065:Wastewater; D014875:Water Pollutants, Radioactive
Suspended radioactive particle; Treatment of low-level radioactive wastewater; Ultrasonic standing wave