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运用标称孔径为 0 .45μm的聚偏氟乙烯 (PVDF)微孔膜 ,本文对浓度为 2 0 mg/L的 Cr3+水溶液体系进行了减压膜蒸馏实验研究 ,结果表明该膜对 Cr3+具有较好的分离效率和较高的膜通量。文中还探讨了在本实验条件下减压膜蒸馏的最佳工艺条件
Using polyvinylidene fluoride (PVDF) microporous membranes with a nominal pore size of 0.45μm, the membrane system of Cr3 + aqueous solution with a concentration of 20 mg / L was studied by vacuum membrane distillation. The results showed that the membrane had better performance than Cr3 + Good separation efficiency and high membrane flux. In this paper, the optimum conditions of vacuum membrane distillation under the experimental conditions are also discussed