Development of Small-scale and On-site Water Treatment System Using Activated Carbon Membrane

使用活性炭膜的小型现场水处理系统的开发

• 批准号: 10555190
• 负责人: SAKODA Akiyoshi
• 金额: $ 4.22万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555190/
• 关键词: Activated Carbon; Filtration Membrane; Water Treatment; Adsorption; Electricthermal Regeneration; 膜; 活性炭膜; 凝集薄膜

1) Bidispersed StructureIt was found that the activated carbon membrane developed in this work has micropores of 0.6 - 0.9 nm in diameter and mesopores of about 10 nm in diameter. The former was formed when the precourcer, polymer microsphere, was thermally decomposed and dechlorinated and controls its adsorption properties. The latter is considered to be spaces among microshperes and controls the water permeation. The total pore volume was 0.30 ml/g and the specific surface area was about 750 m2/g.This bidisperced structure was suspected from the results of permeation measurements of pure water and also molecular weight cut-off data. SEW observation showed that the activated carbon membrane not only formed a skin layer of ceramic support but also penetrated into the support to a certain degree of depth, which resulted in mechanical strength enough to be used in ordinary water treatments.2) Electricthermal RegenerationIt was noted that the activated carbon membrane has the suitable por … More osity and electric conductivity. Then the electricthermal regeneration was proposed and demonstrated in this work, which was carried out by direct charges of electricity to the membrane. Since the activated carbon membrane was very thin, it was heated up very quickly by direct charges of electricity. It can be said that very quick regeneration can be done by this novel regeneration method in principle, however further investigation on heat balances are needed in details. The proper temperature and time for this regeneration vary with the adsorbate. The virgin and regenerated membrane almost shoved the same permeability and adsorption capacity.Activated carbon membrane developed in this work for water treatments has functions of filtration and adsorption, which enable the higher permeability at lower pressure and the higher removal of lower molecular weight organic substances. It can be concluded that this novel activated carbon membrane is promising as a new tool for compact one-step water treatments. Less

1)双分散结构本研究制备的活性炭膜具有直径0.6 ~ 0.9 nm的微孔和直径约10 nm的介孔。前者是在前驱体聚合物微球热分解脱氯过程中形成的，并控制其吸附性能。后者被认为是微球之间的空间，并控制水的渗透。总孔容为0.30 ml/g，比表面积约为750 m2/g。这种双分散结构是从纯水的渗透测量结果和分子量截止数据中怀疑的。SEW观察表明，活性炭膜不仅形成陶瓷支架的表皮层，而且渗透到支架中达到一定深度，其机械强度足以用于普通水处理。2)电热再生活性炭膜具有良好的导电性能和较好的渗透性。在此基础上，提出并论证了电热再生技术，该技术是通过对膜直接充电来实现的。由于活性炭膜非常薄，它被直接电荷加热得非常快。理论上说，这种新再生方法可以实现快速再生，但还需要进一步的热平衡研究。这种再生的适当温度和时间随吸附质的不同而不同。原始膜和再生膜的渗透性和吸附能力基本相同。本研究开发的水处理用活性炭膜具有过滤和吸附功能，在较低压力下具有较高的渗透性，对低分子量有机物的去除率较高。由此可见，这种新型的活性炭膜作为一种紧凑的一步水处理新工具具有广阔的应用前景。少

项目成果

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