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通过水桥棘轮实现漂浮微塑料的毛细管撇取

Capillary Skimming of Floating Microplastics via a Water-Bridged Ratchet.

作者信息

Cho Seohyun, Park Sang Jin, Lee Young Jin, Lee You Jun, Lee Young A, Kim Ho-Young, Kim Seong Jin, Chung Seok, Moon Myoung-Woon

机构信息

Extreme Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.

School of Mechanical Engineering, Korea University, Seoul, 02841, Republic of Korea.

出版信息

Adv Sci (Weinh). 2025 Jan;12(1):e2408623. doi: 10.1002/advs.202408623. Epub 2024 Nov 5.

DOI:10.1002/advs.202408623
PMID:39498909
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11714184/
Abstract

Floating microplastics (MPs) have recently become a major concern in marine pollution; however, current filter-based technology is hardly effective for directly removing such MPs from the water surface because of specific mesh size and clogging issues. This paper introduces a new skimming concept for removing floating MPs utilizing capillary force mediated by the elevation of a hydrophilic ratchet at the air-water interface. MPs floating near the ratchet surface are spontaneously forced toward the ratchet with a concave water meniscus, driven by the Cheerios effect. The MPs can then be skimmed and temporarily held by the deforming concave water meniscus as the ratchet rises. Here, it is found that the stability of the water bridge plays a crucial role in skimming success because it provides capillary adhesion between the MP and the ratchet. The proposed capillary skimming method is observed to be effective across nearly all types of floating MPs, ranging in size from 1 to 4 mm, and with densities varying from 0.02 to 0.97 g cm , which is also demonstrated by a prototype of marine robot cleaner.

摘要

漂浮微塑料（MPs）最近已成为海洋污染中的一个主要问题；然而，由于特定的网眼尺寸和堵塞问题，目前基于过滤器的技术很难直接从水面去除此类微塑料。本文介绍了一种新的撇除概念，用于利用亲水性棘轮在气 - 水界面处升高介导的毛细力来去除漂浮的微塑料。由奇巧圈效应驱动，漂浮在棘轮表面附近的微塑料会随着凹形水弯月面自发地被推向棘轮。然后，随着棘轮上升，微塑料可以被撇除并由变形的凹形水弯月面暂时固定。在此发现，水桥的稳定性在撇除成功中起着关键作用，因为它提供了微塑料与棘轮之间的毛细附着力。观察到所提出的毛细撇除方法对几乎所有类型的漂浮微塑料都有效，其尺寸范围为1至4毫米，密度从0.02至0.97克/立方厘米不等，这也由海洋机器人清洁器的原型得到了证明。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/fba279667353/ADVS-12-2408623-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/eaf258afaba5/ADVS-12-2408623-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/1449d5a5ef00/ADVS-12-2408623-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/4d6ab1852228/ADVS-12-2408623-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/c9960f2afe37/ADVS-12-2408623-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/fd3c5dbee09a/ADVS-12-2408623-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/6d9575a2e223/ADVS-12-2408623-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/16980c62b615/ADVS-12-2408623-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/0f559ec47bae/ADVS-12-2408623-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/b2dcf899de8c/ADVS-12-2408623-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/fba279667353/ADVS-12-2408623-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/eaf258afaba5/ADVS-12-2408623-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/1449d5a5ef00/ADVS-12-2408623-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/4d6ab1852228/ADVS-12-2408623-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/c9960f2afe37/ADVS-12-2408623-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/fd3c5dbee09a/ADVS-12-2408623-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/6d9575a2e223/ADVS-12-2408623-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/16980c62b615/ADVS-12-2408623-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/0f559ec47bae/ADVS-12-2408623-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/b2dcf899de8c/ADVS-12-2408623-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7a1d/11714184/fba279667353/ADVS-12-2408623-g007.jpg

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