水资源短缺和水污染日益严峻,因此,水资源的净化最近引起了越来越多的关注。鉴于其作为主要水资源的地位,饮用水的有效净化至关重要。在这项研究中,我们采用相变法制备了ZrO2/BCM(竹纤维素膜),之后,我们使用哌嗪(PIP)和三碳酰氯(TMC)通过界面聚合开发了IP-ZrO2/BC-NFM(竹纤维素纳滤膜)。随后,我们将这两种膜集成在一起,创建了一个组合的“超滤+纳滤”膜工艺来处理饮用水。膜组合过程在25°C下进行,超滤在0.1MPa和纳滤在0.5MPa。这种膜组合,具有“超滤+纳滤,“对降低浊度有重大影响,始终保持饮用水的过滤后浊度在0.1NTU或以下。此外,对CODMN和氨氮的去除率分别达到75%和88.6%,分别,符合优质饮用水标准。在连续3小时的实验中,纳滤单元对Na2SO4和牛血清蛋白(BSA)表现出一致的保留率,变化小于5%,表明卓越的分离性能。手术9小时后,纳滤单元的水通量开始稳定,下降率约为25%,证明“超滤+纳滤”膜组合在长期使用期间可以保持一致的性能。总之,“超滤+纳滤”膜组合在饮用水处理中表现出显著的性能,提供可行的解决方案来解决与水资源短缺和水污染有关的问题。
Water scarcity and water pollution have become increasingly severe, and therefore, the purification of water resources has recently garnered increasing attention. Given its position as a major water resource, the efficient purification of drinking water is of crucial importance. In this study, we adopted a phase transition method to prepare ZrO2/BCM (bamboo cellulose membranes), after which we developed IP-ZrO2/BC-NFM (bamboo cellulose nanofiltration membranes) through interfacial polymerization using piperazine (PIP) and tricarbonyl chloride (TMC). Subsequently, we integrated these two membranes to create a combined \"ultrafiltration + nanofiltration\" membrane process for the treatment of drinking water. The membrane combination process was conducted at 25 °C, with ultrafiltration at 0.1 MPa and nanofiltration at 0.5 MPa. This membrane combination, featuring \"ultrafiltration + nanofiltration,\" had a significant impact on reducing turbidity, consistently maintaining the post-filtration turbidity of drinking water at or below 0.1 NTU. Furthermore, the removal rates for CODMN and ammonia nitrogen reached 75% and 88.6%, respectively, aligning with the standards for high-quality drinking water. In a continuous 3 h experiment, the nanofiltration unit exhibited consistent retention rates for Na2SO4 and bovine serum protein (BSA), with variations of less than 5%, indicating exceptional separation performance. After 9 h of operation, the water flux of the nanofiltration unit began to stabilize, with a decrease rate of approximately 25%, demonstrating that the \"ultrafiltration + nanofiltration\" membrane combination can maintain consistent performance during extended use. In conclusion, the \"ultrafiltration + nanofiltration\" membrane combination exhibited remarkable performance in the treatment of drinking water, offering a viable solution to address issues related to water scarcity and water pollution.