The use of micellar-enhanced ultrafiltration (MEUF) for fluoride removal from aqueous solutions
The use of micellar-enhanced ultrafiltration (MEUF) for fluoride removal from aqueous solutions
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DOI：
10.1016/j.seppur.2017.11.022
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发表时间：
2018-04-29
影响因子：
8.6
通讯作者：
Majewska-Nowak, Katarzyna
中科院分区：
文献类型：
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作者：
Grzegorzek, Martyna;Majewska-Nowak, Katarzyna
氟是一种常见的化学元素。由于对人体健康的有害影响，世界卫生组织确定饮用水中氟化物的允许水平为1.5 mg F-/L。氟可以通过各种方法从水溶液中去除（即离子交换、沉淀、吸附和膜技术）。一种可有效去除氟化物的膜技术是胶束增强超滤（MEUF）。该方法涉及表面活性剂产生胶束的能力，胶束被经典的超滤膜保留。在本文中，MEUF工艺除氟的适用性进行了验证。批量实验中使用了聚醚砜和再生纤维素超滤膜，以及两种阳离子表面活性剂（氯化十六烷基吡啶- CPC、醋酸十八胺- ODA）。模型溶液中的氟化物含量为10和100 mg F-/L，而表面活性剂浓度在1-3 CMC的范围内变化。MEUF测试是在0.2 MPa的压力下进行的，有和没有盐（NaCl）剂量的处理后的溶液。所得结果表明，对于低氟含量（10 mg F-/L）和高CMC值（3CMC），聚醚砜膜允许去除低于饮用水允许水平的F-离子。模型溶液中NaCl的存在导致除氟效率显著恶化。
Fluorine is a common chemical element. Due to the harmful influence on human health, the World Health Organization determined the permissible level of fluoride in drinking water to be 1.5 mg F-/L. Fluorine can be removed from water solutions by various methods (i.e. ion-exchange, precipitation, adsorption and membrane techniques). One membrane technique that can be effective in fluoride removal is micellar enhanced ultra filtration (MEUF). This method involves the ability of surfactants to create micelles, which are retained by classic ultrafiltration membranes. In the presented paper, the suitability of the MEUF process for fluoride removal was verified. Polyethersulfone and regenerated cellulose ultrafiltration membranes, as well as two cationic surfactants (cetylpyridinium chloride - CPC, octadecylamine acetate - ODA) were used in the batch experiments. The fluoride content in the model solutions amounted to 10 and 100 mg F-/L, whereas surfactant concentration varied in the range of 1-3 CMC. The MEUF tests were performed under a pressure of 0.2 MPa with and without a salt (NaCl) dosage to the treated solutions. The results obtained showed that for a low fluoride content (10 mg F-/L) and a high CMC value (3CMC), the polyethersulfone membrane allowed F- ions below the permissible level for drinking water to be removed. The presence of NaCl in the model solutions resulted in a significant worsening of fluoride removal efficiency.