\r高瑞昶，陈 静

AuthorsHTML:\r高瑞昶，陈 静

AuthorsListE:\rGao Ruichang，Chen Jing

AuthorsHTMLE:\rGao Ruichang，Chen Jing

Unit:\r天津大学化工学院，天津 300350

Unit_EngLish:\rSchool of Chemical Engineering and Technology，Tianjin University，Tianjin 300350，China

Abstract_Chinese:\r利用离子液体支撑液膜(SILM)处理废水中的苯酚．以1-丁基-3-甲基咪唑六氟磷酸盐([Bmim] PF6)为载体、煤油为膜溶剂、聚偏氟乙烯(PVDF)基膜为支撑体膜，采用常温浸渍法制备了离子液体支撑液膜，并以此为液膜相、NaOH 溶液为解析相，通过设计单因素实验，研究了离子液体浓度、进料相苯酚浓度、进料相pH、搅拌速率、温度、解析相NaOH 浓度对苯酚萃取效果的影响，确定了最适操作条件．结果表明，当离子液体体积分数为30%、进料相苯酚质量浓度为200 mg/L、进料相pH＝2、搅拌速率600 r/min、温度25℃、解析相NaOH 浓度为0.2 mol/L 时，纯苯酚溶液的萃取率最高可达93.5%．对离子液体支撑液膜的稳定性和可重复利用性进行了评估．在最适操作条件下，经过5 次连续萃取操作后，苯酚萃取率由93.5%下降为80.5%；对1 次萃取后的液膜进行清洗、再浸渍处理，5 次萃取后，苯酚溶液萃取率仍可保持在90%以上，显示了良好的稳定性和可重复利用性．此外，最适操作条件下对实际工业苯酚废水进行处理的萃取率为91.1%，渗透系数为2.33×10^-5 m/s，展现了较好的实际处理效果．

Abstract_English:\rThe supported ionic liquid membrane (SILM) was used for the removal of phenol in wastewater. The SILM was prepared by the normal-temperature immersion method using [Bmim]PF6，kerosene，and PVDF as the carrier，membrane solvent，and support membrane，respectively. Then，the SILM was used as the liquid membrane phase，and the NaOH solution was used as the stripping phase. The effects of the ionic liquid concentration，phenol concentration in the feed phase，pH of the feed phase，stirring ratio，operating temperature，and NaOH concentration in the stripping phase on the extraction efficiency of phenol were investigated through a single-factor experiment，and the optimum operating conditions were determined. The results indicate that the extraction rate of phenol could reach 93.5% when the ionic-liquid volume fraction，phenol mass concentration in the feed phase，pH of the feed phase，stirring ratio，operating temperature，and NaOH concentration in the stripping phase are 30%，200 mg/L，2，600 r/min，25℃，and 0.2 mol/L，respectively. The stability and reusability of the SILM were evaluated. The extraction rate of phenol reduces from 93.5% to 80.5% after five consecutive transport studies were conducted under optimum conditions. Meanwhile，the removal ratio remains above 90% after extraction was conducted five times，wherein the liquid membrane is cleaned and impregnated after each extraction，indicating good stability and reusability. In addition，under the optimum operating conditions，the extraction rate and permeability coefficient of the industrial phenol wastewater are 91.1% and 2.33×10^?5 m/s，espectively，representing good actual treatment efficiency.

Keyword_Chinese:[Bmim]PF6-煤油；离子液体支撑液膜；苯酚；单因素实验；稳定性

Keywords_English:[Bmim]PF6-kerosene；supported ionic liquid membrane；phenol；single-factor experiment；stability


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