Laboratory of Environmental Technology, Institute of Nuclear and New Energy Technology (INET), Tsinghua University, Beijing 100084, PR China.
J Hazard Mater. 2013 Oct 15;261:307-15. doi: 10.1016/j.jhazmat.2013.07.045. Epub 2013 Jul 27.
Direct contact membrane distillation (DCMD) was used to treat low level radioactive wastewater (LLRW). The dusty gas model (DGM) was used to analyze the mass transfer mechanism and calculate the permeate flux. The operating parameters such as feed temperature, feed velocity and feed concentration were studied. The experimental results showed that DCMD process can separate almost all Cs(+), Sr(2+) and Co(2+) from wastewater. The permeate flux decreased linearly when NaNO3 concentration increased from 1.0 to 200 g/L. The permeate flux remained about 60% of its initial flux even when NaNO3 concentration in feed solution was as high as 200 g/L. The dusty gas model can be successfully applied to estimate the mass transfer, and the experimental permeate flux values fitted well with that calculated by DGM. DCMD is a promising separation process for low level radioactive wastewater treatment.
直接接触式膜蒸馏（DCMD）被用于处理低放放射性废水（LLRW）。采用粉尘气体模型（DGM）分析传质机理并计算渗透通量。研究了操作参数，如进料温度、进料速度和进料浓度。实验结果表明，DCMD 工艺几乎可以将废水中的所有 Cs(+)、Sr(2+)和 Co(2+)分离出来。当硝酸钠浓度从 1.0 增加到 200g/L 时，渗透通量呈线性下降。即使进料溶液中硝酸钠浓度高达 200g/L，渗透通量仍保持在初始通量的约 60%。粉尘气体模型可成功应用于估计传质，实验渗透通量值与 DGM 计算值拟合良好。DCMD 是一种很有前途的低放放射性废水处理分离工艺。
