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首页> 外文期刊>RSC Advances >Modification of a hollow-fibre polyethersulfone membrane using silver nanoparticles formed in situ for biofouling prevention
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Modification of a hollow-fibre polyethersulfone membrane using silver nanoparticles formed in situ for biofouling prevention

机译：使用原位形成的银纳米粒子的空心纤维聚醚砜膜的改性，用于生物污垢预防

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摘要

Biofouling represents a serious problem limiting the widespread application of membrane technology. Therefore, the aim of this study was to develop and verify a new modification method based on the in situ formation of silver nanoparticles and their incorporation into a membrane polymer to prevent biofouling. The modification method consisted of soaking a commercial hollow-fibre polyethersulfone membrane in a solution of silver ions, diffusion of ions into the membrane polymer, and their reduction using ascorbic acid. Such a modified membrane displayed a lower tendency towards biofouling, exhibiting an about 15% higher permeability compared to an unmodified membrane when filtering actual wastewater treatment plant effluent. The modification also led to the formation of stable silver nanoparticles (mostly in the range of 25-50 nm) homogenously distributed on the surface of the hollow-fibres. This resulted in higher surface hydrophilicity (the water contact angle decreased from 91 degrees to 86 degrees) contributing to the biofouling prevention. The modified membrane also showed high stability, as only 2.1% of the total silver leached after 8 h of filtration. Moreover, no changes in the original membrane cross-section structure or separation properties were observed. Besides the improved antibiofouling properties of the modified membrane, the main advantage of the developed method is its simplicity, short reaction time, absence of high energy-consuming initiation, and the possibility to apply it on site, thus even with commercial membrane modules. It will increase the application potential of membranes in the field of wastewater treatment.
机译：生物污染是一个严重的问题，限制了膜技术的广泛应用。因此，本研究的目的是基于银纳米粒子的原位形成，并将其掺入膜聚合物中的新改性方法，以防止生物污染。改性方法包括在银离子溶液中浸泡商业中空纤维聚醚砜膜，将离子扩散到膜聚合物中，并使用抗坏血酸的减少。这种改性膜显示出生物污染的较低趋势，在过滤实际的废水处理厂流出物时，与未改性膜相比，渗透率的渗透率约为15％。该改性还导致形成稳定的银纳米颗粒（主要是在25-50nm的范围内）均匀地分布在中空纤维表面上。这导致较高的表面亲水性（水接触角从91度降低到86度），有助于生物污染预防。改性膜还表现出高稳定性，仅在8小时过滤后浸出的总银浸出的2.1％。此外，观察到原始膜横截面结构或分离性能的变化。除了改进的膜的改善抗弓形性能之外，开发方法的主要优点是其简单性，反应时间短，缺乏高能量的启动，以及在现场施加它的可能性，因此即使使用商业膜组件也可能施加。它将增加废水处理领域膜的应用潜力。

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  • 来源
    《RSC Advances》 |2018年第26期|共9页
  • 作者

    Dolina Jan; Goncukova Zuzanna; Bobak Marek; Dvorak Lukas;

  • 作者单位

    Tech Univ Liberec Inst Nanomat Adv Technol &

    Innovat Studentska 2 Liberec 46117 Czech Republic;

    Tech Univ Liberec Inst Nanomat Adv Technol &

    Innovat Studentska 2 Liberec 46117 Czech Republic;

    Membrain Sro Pod Vinici 87 Straz Pod Ralskem 47127 Czech Republic;

    Tech Univ Liberec Inst Nanomat Adv Technol &

    Innovat Studentska 2 Liberec 46117 Czech Republic;

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  • 正文语种 eng
  • 中图分类 化学;
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