采用自制聚偏氟乙烯 ( PVDF)微孔膜和商品 PVDF膜对含铬 ( )水溶液进行了减压膜蒸馏分离实验研究。结果表明 ,两种膜的膜通量相接近 ,商品膜对铬的截留率达 90 %以上。讨论了膜性能参数和实验条件对膜通量和截留率的影响。 A self-made polyvinylidene fluoride (PVDF) microporous membrane and commercial PVDF membrane were used to separate the aqueous solution containing chromium (Cr) from the membrane by vacuum distillation. The results showed that the membrane fluxes of the two membranes were similar, and the retention of chromium on the membrane was above 90%. The effects of membrane performance parameters and experimental conditions on membrane flux and rejection were discussed.