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首页> 外文期刊>Environmental Science & Technology >Investigation of Thermal Properties of Graphene-Coated Membranes by Laser Irradiation to Remove Biofoulants
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Investigation of Thermal Properties of Graphene-Coated Membranes by Laser Irradiation to Remove Biofoulants

机译：激光辐照去除生物污垢的石墨烯包覆膜的热性能研究

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摘要

In the present study, we take advantage of the high thermal conductivity of graphene nanomaterials to develop a filter that can be easily cleaned via laser irradiation after biofouling occurs. In this investigation, the intensity of the laser beam and the amount of graphene used for membrane coating were investigated with Bacillus subtilis to achieve the most efficient removal of biofoulants. Thermographic measurements of glass microfiber filters coated with 500 mu g of graphene showed an increase in temperature of about 328 +/- 9 degrees C in about 6 s when the filters were irradiated with a 21.6 W/cm(-2) laser intensity, which allowed successful removal of biofoulants. The thermal cleaning was effective for at least four filtrations without impacting the subsequent microbial removals, which were of similar to 5 log for each filtration step followed by laser irradiation. Additionally, the permeability of the coated filters only dropped from 17.8 to 15.9 L/m(2)s after the laser cleaning procedure. The cleaning procedure was validated by using bayou water with a complex composition of biofoulants. Graphene-coated membranes coupled with laser irradiation afford a very fast and nonhazardous approach to clean biofoulants on graphene-coated membranes.
机译：在本研究中，我们利用石墨烯纳米材料的高导热性来开发一种过滤器，该过滤器在发生生物污损后可以通过激光辐照轻松清洗。在这项研究中，用枯草芽孢杆菌研究了激光束的强度和用于膜包衣的石墨烯的量，以最有效地去除生物污垢。涂有500μg石墨烯的玻璃微纤维滤光片的热像仪测量显示，当滤光片以21.6 W / cm（-2）的激光强度照射时，温度在约6 s内升高约328 +/- 9摄氏度。允许成功清除生物污垢。热清洗对于至少四个过滤是有效的，而不会影响随后的微生物去除，对于随后进行激光辐照的每个过滤步骤，其类似于5 log。此外，经过激光清洁后，镀膜过滤器的渗透率仅从17.8 L / m（2）s下降。通过使用具有复杂生物污垢成分的巴尤水来验证清洁程序。石墨烯涂层的膜与激光辐照相结合提供了一种非常快速且无危险的方法来清洁石墨烯涂层的膜上的生物污垢。

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  • 来源
    《Environmental Science & Technology》 |2019年第2期|903-911|共9页
  • 作者

    Bandara Pasan C.; Ferrara Felipe Ibanez de Santi; Hoang Nguyen; Santos Greggy; Shih Wei-Chuan; Rodrigues Debora F.;

  • 作者单位

    Univ Houston, Dept Civil & Environm Engn, Houston, TX 77204 USA;

    Univ Houston, Dept Civil & Environm Engn, Houston, TX 77204 USA;

    Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA;

    Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA;

    Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA;

    Univ Houston, Dept Civil & Environm Engn, Houston, TX 77204 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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