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中文摘要：
以高温凝结水的净化为应用背景，采用孔径为4nm的陶瓷膜去除水中微量Fe3＋。考察Fe^3＋浓度、pH及操作参数等对陶瓷膜分离性能的影响。结果表明：随着Fe3＋浓度增大，陶瓷膜对Fe^3＋的去除率减小；当Fe^3＋质量浓度小于50mg／L时，陶瓷膜对Fe^3＋的去除率大于98％，操作条件如温度和膜面流速（CFV）的提高均有利于提高陶瓷膜对Fe^3＋的截留率；温度升高有利于提高膜过滤通量，操作压力对通量的拐点为0．2MPa,膜面流速的拐点在3m／s左右；pH对Fe3＋的去除率影响显著，主要由于pH影响了Fe3＋在水中的化学构成。
英文摘要：
The purification of high-temperature condensed water was necessary. Removal of Fe3＋ with ce- ramic membrane of nominal pore size 4 nm from water solution was studied. The effects of Fe3 ＋ concentra- tion, pH and operation parameters on the separation performances of ceramic membrane were investigated. The Fe3＋ rejection rate decreased with the increasing of Fe3＋ concentration. The Fe3＋ rejection rate with ceramic membrane was more than 98% when Fe3＋ concentration was less than 50 mg/L. The rejection rate was improved with the increasing of the temperature and cross-flow velocity （CFV）. The permeate flux increased with the increasing of the temperature, and leveled off at operation pressure 0.2 MPa. Mean- while, the permeate flux also increased with CFV when CFV about 3 m/s. pH had a major influence on the rejection rate, and it affected by the chemical forms of Fe3＋ in solution.
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