| 碳纳米管改性PVDF中空纤维超滤膜处理二级出水抗污染性能研究 |
| 摘要点击 3079 全文点击 1042 投稿时间：2016-03-01 修订日期：2016-08-18 |
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| 中文关键词 超滤膜 二级出水 膜污染 碳纳米管 膜改性 |
| 英文关键词 ultrafiltration membrane sewage effluent membrane fouling carbon nanotube membrane modification |
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| 中文摘要 |
| 采用碳纳米管改性PVDF中空纤维超滤膜以缓解膜污染.考察了CNTs的乙醇分散液浓度、CNTs尺寸和负载量对改性中空纤维膜的抗污染性能和改性膜内表面CNTs层稳定性的影响，分析了该改性膜对二级出水DOC、UV254的去除效果，并对改性膜出水的荧光特性进行了表征.结果表明，选用体积分数为50%的乙醇分散液、外径为30~50 nm碳纳米管、负载量为3g·m-2时，制备的改性中空纤维膜CNTs层稳定，抗污染能力显著提高.与未改性膜相比，改性膜对二级出水DOC和UV254的去除率分别提高了37%和56%；且对二级出水中的腐殖类和蛋白质类物质去除能力明显增强. |
| 英文摘要 |
| The modification of hollow fiber ultrafiltration membranes with carbon nanotube (CNTs) on fouling control was investigated.Considering the antifouling ability of the CNT-modified membranes and the stability of CNTs layer,several factors were analyzed and evaluated,including the concentration of ethanol-dispersion,the diameter of CNTs,and the loading mass of CNTs.Besides,DOC,UV254,and fluorescence characteristics of the permeate from the CNT-modified membrane were analyzed.The results revealed that the optimal modification method included a 50%(volume fraction) ethanol-dispersion,a 30-50 nm diameter-CNTs,and 3 g·m-2 CNTs' loading.Compared with the virgin membrane,the removal rates of DOC and UV254 by the CNT-modified membrane were increased by 37% and 56%,respectively.Meanwhile,it was proved that the humic-like and protein-like materials were more easily removed by the CNT-modified membrane. |
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