[Experimental study on the treatment of low level radioactive waste water by inorganic nanofiltration membrane].
Soluble sodium poly(acrylic) acid (NaPAA) with molecular weight of 2000-5000 was selected as an assistant reagent of inorganic nanofiltration membrane which was used to treat low level radioactive waste water mainly containing radionuclides 90Sr, 137Cs and 60Co. The effect of non-active simulated wastewater pH and NaPAA concentration on the retention efficiency of non-active nuclides strontium, cesium and cobalt ions and membrane permeation flux were explored, and the effect mechanism was also preliminarily discussed. The optimum process parameters were decided: pH 7-8, NaPAA volume concentration no lower than 0.1%. Real radioactive waste water was treated under optimum experiment condition. The results show that the decontamination efficiency of total beta and gamma emitters of low-level radioactive wastewater were both up to about 95% by inorganic nanofiltration assisted by NaPAA, and the permeation flux was also satisfying.
Bai
Qing-zhong
QZ
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. Baiqzh@tsinghua.edu.cn
Chen
Hong-sheng
HS
Ye
Yu-cai
YC
Li
Jun-feng
JF
Mu
Xu-feng
XF
Cao
Wen
W
D008567:Membranes, Artificial; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D011850:Radioactive Waste; D015203:Reproducibility of Results; D014462:Ultrafiltration / Q000379:methods; D014865:Waste Disposal, Fluid / Q000379:methods*; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D018508:Water Purification / Q000379:methods
D008567:Membranes, Artificial; D011850:Radioactive Waste; D014875:Water Pollutants, Radioactive