A study on radiation technological degradation of organic chloride wastewater--exemplified by TCE and PCE.
This paper describes the potential of using gamma radiation technology to degrade trichloroethylene (TCE) and perchloroethylene (PCE) wastewater. The experimental method is divided into two parts: (1) using the gamma-ray to irradiate the TCE and PCE solution, the dose-rate is 10Gy/minute, the irradiation dosage is 0-2.5kGy and (2) self-making the UV irradiation system, the tube specification is 254nm and 6W, and turning on 8 tubes at the same time to make the irradiation. The efficiency of degradation ratio for gamma-ray is better than UV in the range of 0.1-250ppm; for example, as for the concentration of 0.1ppm, when TCE is degraded to D(90) and T(90), the gamma-ray only needed 46.7Gy and took about 4.67 minutes, but UV needed to take about 28.1 minutes. The dose-concentration equations of TCE and PCE are: TCE: y=44.58+8.832x, R(2)=0.999; and PCE: y=81.33+12.81x, R(2)=0.997. We verified that the radiation technology is able to effectively degrade the organic chlorine wastewater without yielding the secondary pollution, and the TCE and PCE that degraded by using gamma-ray will be reached US-EPA and Taiwan Effluent Standard (5ppb).
Huang
Sheng-Kai
SK
Institute of Radiological Science, Central Taiwan University of Science and Technology, No. 11, Buzih Lane, Beitun District, Taichung City 40601, Taiwan, ROC.
Hsieh
Ling-Ling
LL
Chen
Chia-Chieh
CC
Lee
Po-Hsiu
PH
Hsieh
Bor-Tsung
BT
D005720:Gamma Rays; D006843:Hydrocarbons, Chlorinated / Q000528:radiation effects*; D007220:Industrial Waste / Q000517:prevention & control; D013750:Tetrachloroethylene / Q000528:radiation effects; D014241:Trichloroethylene / Q000528:radiation effects; D014874:Water Pollutants, Chemical / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods
D006843:Hydrocarbons, Chlorinated; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D014241:Trichloroethylene; D013750:Tetrachloroethylene