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hellen7256木虫 (小有名气)
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[求助]
求助翻译英文文献。请高手帮助。
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The permeate mass at each time interval was collected using liquid-nitrogen traps in the pervaporation test apparatus. Additionally, at each time interval, the feed and permeate were sampled, and the selectivity was determined by measuring the ion % rejection (Ri), i.e., the ratio of the ion concentration in the permeate to that in the feed, using the following equation: where Ci,F and Ci,P are the concentrations of solute i in the feed and permeate, respectively. For comparative purposes, pervaporation tests with various membrane thicknesses were conducted for pure water using self-supporting NaA membranes. Additionally, the water fluxes in the NaCl solutions were investigated. The preliminary results from the desalination experiments using the self-supporting NaA membrane were the following: for a feed of 3.5 mass % of a NaCl solution at 25ºC, the water fluxes changed from 0.42 to 4.74 kg m-2 h-1 when the membrane thickness was decreased from 9.4 mm to 2 mm. The Na ion % rejection increased when the membrane thickness was increased. If the membrane thickness exceeds 9.4 mm, the Na ion % rejection exceeds 99.5%, and a lower water flux of 0.42 kg m-2 h-1 was obtained, as shown in Fig. 6. It might also be noted that the membranes with a smaller thickness do not perform well under a high feed pressure. In addition, the study showed that the PV temperature (<90 ºC) did not influence the Na ion % rejection of this self-supporting zeolite membrane. |
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