Technique for recycling used oxygen-18 water
- VernacularTitle:核医学示踪剂原料氧-18水废液提纯工艺的研究
- Author:
Zhongdong YANG
- Publication Type:Journal Article
- Keywords:
oxygen-18 water;
isolation and purification;
nuclear medicine
- From:
Academic Journal of Second Military Medical University
1985;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the recycling technique for used nuclear-medicine tracer oxygen-18 water.Methods:A small-scale purification device for wasted oxygen-18 water was built.Six processes,including cotton core filtration,active carbon adsorption,ultraviolet oxidation,anti-osmosis filtration,ion exchange,and simple evaporation,were included in the device.Totally 10.5 kg experimental samples were evenly divided into 21 portions.Three portions of the samples were treated by each of the above 6 processes for 5 cycles by dosing pump.The electrical conductivity,TOC(total organic carbon), enrichment of oxygen-18 water,and the material consumption,were statistically analyzed after each recycling.Results:Samples were greatly consumed in the anti-osmosis filtration process and the enrichment of oxygen-18 in the ion exchange process dropped markedly;therefore,the above 2 processes were ruled out for the recycling.Though sample consumption was higher in the initial steps of cotton core filtration and active carbon adsorption,but was lower in the latter steps.Samples were hardly consumed in ultraviolet oxidation and simple evaporation;meanwhile,these processes had little influence on enrichment of isotope oxygen-18.The suitable processes for wasted oxygen-18 water purification were cotton core filtration,active carbon adsorption,ultraviolet oxidation,and simple evaporation.The 4 suitable steps were used for 1500 g samples.The conductance value of the resultant samples(1341 g)was(2.22?0.03)?S/cm,the TOC was(0.86?0.01)mg/L,and the enrichment was (32.44?0.04)atom%(dropped by 2.56%),with the sample consumption rate being 10.6%.Conclusion:Cotton core filtration,active carbon adsorption,ultraviolet oxidation,and simple evaporation can basically meet the demand for recycling oxygen-18 water.
