GO@MOFs骨架纳滤膜对地表水中嗅味物质的去除效能

GO@MOFs Removal of Odorous Substances from Surface Water by Skeleton Nanofiltration Membranes

2-甲基异莰醇(2-MIB)和土臭素(GSM)是饮用水源中最常见的两种致嗅物质,常规水处理工艺难以将其高效去除。实验利用GO@MOFs作为改性材料,制备了一种致密型GO@MOFs/PVDF复合纳滤膜,对其形貌和结构进行了表征,研究了GO@MOFs/PVDF复合纳滤膜对两种嗅味物质的去除效果。结果表明,GO@MOFs/PVDF复合纳滤膜较PVDF纳滤膜对2-MIB和GSM具有更高的去除效能;去除率随致嗅物质浓度升高而升高,当浓度达到100 ng/L时,GO@MOFs/PVDF复合纳滤膜对两者的去除率均可达到100%;GO@MOFs/PVDF复合纳滤膜对总浓度为100 ng/L,不同比例2-MIB+GSM的混合溶液中各物质的去除率均可达85%以上。

2-Methylisocamphol(2-MIB)and geosmin(GSM)are the two most common odorigens in drinking water sources,and conventional water treatment processes are difficult to meet the requirements of drinking water standards.In experimental experiments,a dense GO@MOFs/PVDF composite nanofiltration membrane was prepared by using GO@MOFs as a modified material.Its morphology and structure were characterized,and the removal effect of GO@MOFs/PVDF composite nanofiltration membrane on two odorous substances at different concentrations was studied.The results showed that GO@MOFs/PVDF composite nanofiltration membrane has a higher removal effect for 2-MIB and GSM than PVDF nanofiltration membrane.The removal effect increased with the increase of concentration,and when the concentration reached 100 ng/L,the removal rate of GO@MOFs/PVDF composite nanofiltration membrane reached 100%.The removal effect of GO@MOFs/PVDF composite nanofiltration membrane on 100 ng/L and different proportions of 2-MIB+GSM mixed solution can reach more than 85%.