Synergistic Effects of Polydopamine/Medical Stone Bio-Adsorbents for Enhanced Interfacial Adsorption and Dynamic Filtration of Bacteria.

IF 4.7 3区工程技术 Q1 POLYMER SCIENCE

Polymers Pub Date : 2024-10-29 DOI:10.3390/polym16213027

Wenfeng Chen, Sha Wan, Hongxin Lin, Shimi Li, Anhua Deng, Lihui Feng, Yangfan Xu, Xu Zhang, Zhen Hu, Fang Xu, Kun Yan

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引用次数: 0

Abstract

Polymer-based wastewater disinfection, which is typically performed using chemical oxidation or irradiation, can result in various toxic byproducts and corrosion under harsh environments. This study introduces a robust bio-adsorbent prepared from naturally abundant polydopamine-modified medical stone (MS@PDA) for the high-efficiency removal of bacteria from water. The PDA nanocoating can be easily applied through an in situ self-polymerization process, resulting in a considerably high bacterial adsorption capacity of 6.6 k pcs mm^-2 for Staphylococcus aureus. A cyclic flow-through dynamic filtration and a disinfection system was implemented using an MS@PDA porous filter with an average pore size of 21.8 ± 1.4 µm and porosity of ~83%, achieving a 5.2-6.0-fold enhancement in the cumulative removal efficiency for MS@PDA₂. The underlying mechanisms were elucidated through the synergistic effects of interfacial bio-adsorption and size-dependent interception. Notably, the bacteria captured on the surface could be killed using the enhanced photothermal effects of the PDA nanocoating and the inherent antimicrobial properties of the mineral stone. Thus, this study not only provides a new type of advanced bio-adsorbent but also provides new perspectives on an efficient and cost-effective approach for sustainable wastewater treatment.

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聚多巴胺/医用石生物吸附剂在增强细菌界面吸附和动态过滤方面的协同效应

基于聚合物的废水消毒通常采用化学氧化或辐照法，在恶劣环境下会产生各种有毒副产品和腐蚀。本研究介绍了一种利用天然丰富的多巴胺改性医用石材（MS@PDA）制备的强效生物吸附剂，用于高效去除水中的细菌。通过原位自聚合工艺，PDA 纳米涂层可以轻松应用，因此对金黄色葡萄球菌的细菌吸附能力高达 6.6 k pcs mm-2。通过使用平均孔径为 21.8 ± 1.4 µm、孔隙率约为 83% 的 MS@PDA 多孔过滤器，实现了循环流动动态过滤和消毒系统，使 MS@PDA2 的累积去除效率提高了 5.2-6.0 倍。通过界面生物吸附和尺寸依赖性拦截的协同效应，阐明了其基本机制。值得注意的是，利用 PDA 纳米涂层增强的光热效应和矿物石固有的抗菌特性，可以杀死表面捕获的细菌。因此，这项研究不仅提供了一种新型的先进生物吸附剂，还为可持续废水处理提供了一种高效、经济的新方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.