School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China; Institute of Ocean Engineering, Ningbo University, Ningbo 315211, China.
School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China; Institute of Ocean Engineering, Ningbo University, Ningbo 315211, China; Department of Civil and Environmental Engineering, University of Massachusetts Lowell, One University Ave., Lowell, MA 01854, USA.
Water Res. 2023 Sep 1;243:120383. doi: 10.1016/j.watres.2023.120383. Epub 2023 Jul 21.
Developing anti-biofouling and anti-biofilm techniques is of great importance for protecting water-contact surfaces. In this study, we developed a novel double-layer system consisting of a bottom immobilized TiO nanoflower arrays (TNFs) unit and an upper superhydrophobic (SHB) coating along with the assistance of nanobubbles (NBs), which can significantly elevate the interfacial oxygen level by establishing the long-range hydrophobic force between NBs and SHB and effectively maximize the photocatalytic reaction brought by the bottom TNFs. The developed NBs-SHB/TNFs system demonstrated the highest bulk chemical oxygen demand (COD) reduction efficiency at approximately 80% and achieved significant E. coli and Chlorella sp. inhibition efficiencies of 5.38 and 1.99 logs. Meanwhile, the system showed a sevenfold higher resistance to biofilm formation when testing in a wastewater matrix using a wildly collected biofilm seeding solution. These findings provide insights for implementing nanobubble-integrated techniques for submerged surface protection.
开发抗生物污损和抗生物膜技术对于保护水接触表面非常重要。在本研究中，我们开发了一种由底部固定的 TiO2 纳米花阵列（TNFs）单元和上层超疏水（SHB）涂层组成的新型双层系统，该系统在纳米气泡（NBs）的辅助下，通过在 NBs 和 SHB 之间建立长程疏水力，显著提高了界面氧气水平，并有效地最大限度地提高了底部 TNFs 带来的光催化反应。所开发的 NBs-SHB/TNFs 系统在大约 80%的批量化学需氧量（COD）去除效率方面表现出最高的效率，并实现了 5.38 和 1.99 对数的显著大肠杆菌和绿藻抑制效率。同时，该系统在使用广泛收集的生物膜接种溶液的废水基质中进行测试时，显示出对生物膜形成的七倍更高的抵抗力。这些发现为实施纳米气泡集成技术提供了水下表面保护的思路。
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