Antifouling performance of spiral wound type module made of carbon nanotubes/polyamide composite RO membrane for seawater desalination
Antifouling performance of spiral wound type module made of carbon nanotubes/polyamide composite RO membrane for seawater desalination
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DOI：
10.1016/j.desal.2021.115445
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发表时间：
2021-11-17
期刊：
影响因子：
9.9
通讯作者：
Endo, Morinobu
中科院分区：
文献类型：
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作者：
Fajardo-Diaz, Juan L.;Morelos-Gomez, Aaron;Endo, Morinobu
利用交联聚酰胺(PA)和碳纳米管(CNT)膜组装了坚固的纳米复合反渗透(RO)组件，并在实际海水淡化条件下对其抗污染性能进行了评价。碳纳米管-PA纳米复合膜被用来构建2英寸。和4英寸。RO模块。在实验室里，使用溶解在模拟海水中的牛血清白蛋白(BSA)对这些模块进行了污垢测试。合成的交联型碳纳米管聚酰胺结构具有较低的污垢相互作用和较高的盐截留率(99.87wt%)。与商用防污染膜相比，反渗透实验室规模的组件表现出了良好的防污染性能，保持了连续操作，压降没有明显变化。在日本北九州市的水广场设施进行了真实海水的中试试验。采用CNT-PA纳米复合材料组件建造的反渗透工业容器，由于表面电荷的变化和表面污垢的堵塞，表现出了优异的防污性能，稳定运行了100天以上。相比之下，防污商用船的污垢沉降量是后者的2.3倍。这些CNT-PA纳米复合材料RO防污模块具有不间断的运行性能，是海水淡化厂的理想选择，因为它们比商用膜需要更少的运行维护，促进了绿色海水淡化技术，由于当前的环境问题，这项技术变得越来越重要。
Robust nanocomposite reverse osmosis (RO) module was assembled using crosslinked polyamide (PA) and carbon nanotubes (CNT) membranes, and their fouling resistance in real seawater desalination conditions was evaluated. The CNT-PA nanocomposite membrane was used to build a 2 in. and 4 in. RO module. The modules were tested for fouling in the laboratory using bovine serum albumin (BSA) dissolved in simulated seawater. The synthesis of the crosslinked CNT polyamide structure resulted in a lower foulant interaction and high salt rejection rates (99.87 wt%). The RO-laboratory scaled modules showed excellent antifouling behavior compared with commercial antifouling membranes, maintaining a continuous operation without substantial pressure drop variations. Pilot-plant tests with real seawater were performed at the water plaza facility, Kitakyushu city, Japan. A RO industrial vessel built with CNT-PA nanocomposite modules showed superior antifouling performance with a stable operation for more than 100 days due to changes in surface charge and superficial fouling blocking. In contrast, antifouling commercial vessel showed 2.3 times higher foulant deposition. These CNT-PA nano composites RO antifouling modules for uninterrupted operation performance are ideal for desalination plants because they require less operation maintenance than commercial membranes, promoting green desalination technology, which is becoming increasingly important due to current environmental concerns.