利用气泡和油从水中捕捉微塑料

IF 10.1 1区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
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引用次数: 0

摘要

利用油类去除水中的微塑料(MPs)已初见成效;然而,将这一技术融入可行的现场方法仍有待开发。本文展示了一种简单而有效的方法,即利用带有气泡的植物油从水中捕捉微塑料,其去除率高达 98%。与其他搅拌方法相比,使用气泡的去除率更高。由于气泡的搅拌作用较小,油层不会被破坏,这意味着不会有油释放到散装水相中。这样就避免了二次污染--这与膜过滤(另一种有效的去除方法)不同,在膜过滤中,基于聚合物的膜会因化学反冲洗和老化而损坏。研究表明,微米级(50-170 μm)的 MP 尺寸变化对去除效率的影响较小;但对于较大的毫米级 MP(500-5000 μm),去除率可达 100%。同样,在捕获微纤维时也能达到 99% 以上的高去除率。此外,还对油量和水盐度等其他因素进行了研究和讨论。基于这些结果,所提出的方法可以作为一种被动和连续的 MP 捕获方法,被引入到多种环境类型中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Utilization of Bubbles and Oil for Microplastic Capture from Water
The removal of microplastics (MPs) from water using oil has shown early promise; however, incorporation of this technique into a feasible in situ method has yet to be developed. Here, a simple yet effective method of MP capture from water using vegetable oil with bubbles is demonstrated to achieve high removal efficiencies of > 98%. Comparisons are made with other methods of agitation, and higher removal efficiencies are observed when bubbles are used. Due to the low agitation provided by the bubbles, the oil layer remains unbroken, meaning that no oil is released into the bulk water phase. In this way, secondary contamination is avoided—unlike membrane filtration, another effective removal method, in which polymer-based membranes can break down due to chemical backwashing and ageing. It is demonstrated that variation in MP size within the micrometer range (50–170 μm) has minor impact on the removal efficiency; however, 100% removal is achieved for larger, millimeter-sized MPs (500–5000 μm). Similarly, a high removal efficiency of greater than 99% is achieved in the capture of microfibers. Other factors such as oil volume and water salinity are also investigated and discussed. Based on these results, the proposed method can be introduced into multiple setting types as a passive and continuous method of MP capture.
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来源期刊
Engineering
Engineering Environmental Science-Environmental Engineering
自引率
1.60%
发文量
335
审稿时长
35 days
期刊介绍: Engineering, an international open-access journal initiated by the Chinese Academy of Engineering (CAE) in 2015, serves as a distinguished platform for disseminating cutting-edge advancements in engineering R&D, sharing major research outputs, and highlighting key achievements worldwide. The journal's objectives encompass reporting progress in engineering science, fostering discussions on hot topics, addressing areas of interest, challenges, and prospects in engineering development, while considering human and environmental well-being and ethics in engineering. It aims to inspire breakthroughs and innovations with profound economic and social significance, propelling them to advanced international standards and transforming them into a new productive force. Ultimately, this endeavor seeks to bring about positive changes globally, benefit humanity, and shape a new future.
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