Preparation of poly(vinylidene fluoride) membranes with graphene oxide addition for natural organic matter removal
Preparation of poly(vinylidene fluoride) membranes with graphene oxide addition for natural organic matter removal
复制标题
添加氧化石墨烯制备聚偏二氟乙烯膜用于去除天然有机物
DOI：
10.1016/j.memsci.2014.09.018
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发表时间：
2015
影响因子：
9.5
通讯作者：
Ni Muzi
中科院分区：
文献类型：
--
作者：
Xia Shengji;Ni Muzi
近年来，人们提出了各种改进方法来提高膜的性能。在这项研究中，通过相转化法制备了含有不同浓度氧化石墨烯（GO）作为添加剂的聚偏二氟乙烯（PVDF）膜。结果发现，GO的添加大大增强了所制备膜的防污性能，因此在渗透过程中可以保持较高的通量。然而，过量添加GO会对膜通量产生负面影响。详细研究了 GO 对膜通量和天然有机物 (NOM) 去除的影响。分析渗透水的溶解有机碳 (DOC)、比紫外吸光度 (SUVA)、分子量分布 (MWD) 和荧光激发发射矩阵 (EEM)。结果表明，GO 的添加在一定程度上提高了 NOM 的去除率，其中 0.5 wt% GO 复合膜的效果最好。添加GO的PVDF膜在与其他工艺结合的应用中仍然具有值得注意的可用性，因为在不牺牲去除率的情况下，渗透通量和防污性能显着提高。
In recent years, various modifications have been proposed to improve membrane performance. In this study, poly(vinylidene fluoride) (PVDF) membranes containing different concentrations of graphene oxide (GO) as an additive were prepared via a phase inversion method. It was observed that the antifouling property of the prepared membranes was greatly enhanced by the addition of GO, so higher fluxes could be maintained during permeation. However, over adding GO has a negative impact on membrane flux. The effect of GO on fabricated membranes flux and the removal of natural organic matter (NOM) was investigated in detail. Permeate water was analyzed for dissolved organic carbon (DOC), specific ultraviolet absorbance (SUVA), molecular weight distribution (MWD) and fluorescence excitation–emission matrices (EEMs). The results show that NOM removal was improved by GO addition to a certain extent and that the 0.5 wt% GO composite membrane performed best. PVDF membranes with GO added still have noteworthy usability in applications coupled with other processes because permeate flux and antifouling property improved significantly without sacrificing removal rate.
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