Water-to-Air Transfer of Nano/Microsized Particulates: Enrichment Effect in Bubble Bursting Jet Drops

Ji, Bingqiang; Singh, A. L.; Feng, Jie

doi:10.1021/acs.nanolett.2c01102

Cited by 20 publications

(33 citation statements)

References 87 publications

(210 reference statements)

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“…Additionally, an approximately linear relationship was observed between the water and air concentrations of PS MNP on a logarithmic scale. At higher concentrations in water, the observed linearity may wear off due to the scavenging of MNP by rising bubbles reaching saturation 45 along with potential homo-and heteroaggregation of MNP in natural waters. 29,46 However, no such aggregation was observed in the PS samples.…”

Section: Mnp Aerosolization Experimentsmentioning

confidence: 99%

“…26 Masry et al 26 used pristine PE microspheres with a similar size range (0.2−9.9 μm) in their bubble bursting experiments and also observed no significant transfer. Additionally, unlike PS MNP that can be scavenged by the bubbles during their rise through the bulk water, 45,48,49 floating PE MNP have to be present in the bubble cap during surface bubble bursting for aerosolization to occur. 26…”

Section: Mnp Aerosolization Experimentsmentioning

confidence: 99%

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Quantification of the Emission of Atmospheric Microplastics and Nanoplastics via Sea Spray

Harb

Pokhrel

Foroutan

2023

Environ. Sci. Technol. Lett.

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There is growing interest in the transfer of micro- and nanoplastics (MNP) to the atmosphere from the ocean via sea spray, and a limited number of studies have quantified this emission. This study addresses the uncertainty surrounding existing global oceanic MNP emission estimates by developing an experimentally based emission parametrization. We conducted systematic laboratory experiments to understand the impact of MNP size, density, and concentration in water on their aerosolization. The results show that the MNP considered in this study, with a diameter of ≤10 μm, can be emitted via bubble bursting, with the aerosolization increasing monotonically with an increase in the concentration in water and decreasing with an increase in the particle size. Floating polyethylene MNP are observed to be less effectively aerosolized than polystyrene MNP dispersed in bulk water. Using the developed emission parametrization, we estimate that the upper limit of yearly MNP oceanic emission is 50.7 (14.2–93.4) quadrillion (1015) pieces year–1 and 1.66 (0.72–4.13) t year–1. The experimental measurements and ensuing parametrization developed in this study are a timely contribution to the atmospheric microplastic modeling community and will help in further constraining the oceanic source of atmospheric MNP and their potential climatic, environmental, and health implications.

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Section: Mnp Aerosolization Experimentsmentioning

confidence: 99%

Section: Mnp Aerosolization Experimentsmentioning

confidence: 99%

Quantification of the Emission of Atmospheric Microplastics and Nanoplastics via Sea Spray

Harb

Pokhrel

Foroutan

2023

Environ. Sci. Technol. Lett.

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“…During the ascent of bubbles, the target molecules are intercepted and adsorbed on the bubble surface due to the lower surface energy, resulting in aerosols rich in target molecules when they reach the liquid–gas interface . Rupture jetting is a universal process that occurs when bubbles reach the liquid surface and collapse, causing a jetting droplet due to the cavity collapse-induced upward liquid jet . Through the tuning of bubbling parameters, the absorption efficiency of the substrate collecting the target chemical is escalated.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of an Optoplasmonic Raft with Improved SERS Performance Detecting Methamphetamine through Bubble Enrichment

Hong,

Zhu,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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In this work, a novel raft-like structure that combines noble metal nanoparticles (NPs) with an interconnected layer of hemispherical dielectric shell was fabricated and characterized. It was discovered that this hybrid material can enhance the optoplasmonic interaction between plasmonic and dielectric components, thereby improving the sensing performance in surface-enhanced Raman spectroscopy (SERS). Varied geometric parameters of the fabricated optoplasmonic raft, including the inner diameter and thickness of the dielectric shell, were attempted and analyzed through numerical simulation and experimental SERS measurements. With particular size, thickness, and incident orientation, the silica shell focuses the incident optical flow into the deposited silver NPs, undergoing similar near-field focusing behavior in comparison with other optoplasmonic entities. This optoplasmonic raft floating on the water surface is able to harvest the target molecules effectively through bubble enrichment, which rapidly captures and concentrates analytes from the aqueous phase. With a limited sampling time, the sensing performance of the developed optoplasmonic raft is improved by applying the optimized parameters involved in bubble enrichment. The substrates and corresponding enrichment method were implemented in the detection of methamphetamine (METH), achieving a limit of detection (LOD) down to 0.035 nM. As for practical onsite detection, the developed substrate and bubbling strategy were applied in an assembled set, employing a portable Raman spectrometer and an air pump. This set is able to detect METH dissolved in regular commercial beer, which is quite competent in the investigation of drug abuse.

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“…This process is associated with aerosol production [10,[22][23][24][25], including bacteria [26,27] and organic compounds [28]. Besides these, bursting can also lead to the ejection of microplastic particles into the air [29][30][31][32][33] similar to microplastic ejection by impacting raindrops [34].…”

Section: Introductionmentioning

confidence: 99%

Modeling of vertical microplastic transport by rising bubbles

2023

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Microplastic particle concentration at the sea surface is critical for quantifying microplastic transport across the water-air interface. Previous studies suggest that the concentration at the sea surface is enhanced compared to bulk concentration, yet little is known about the detailed mechanisms behind this enhancement. In this work, we model one particular process in simulation that may contribute to this enhanced surface concentration: bubble scavenging. Using lattice-Boltzmann Volume-of-Fluid simulations, we find that rising bubbles indeed generate a net flow of particles toward the surface. The efficiency of the process, however, highly depends on the microplastic particle surface properties. Clean, hydrophobic particles adhere much better to the bubble surface and are therefore transported significantly better than weathered, hydrophilic particles that are only entrained in the flow around a bubble.

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Water-to-Air Transfer of Nano/Microsized Particulates: Enrichment Effect in Bubble Bursting Jet Drops

Cited by 20 publications

References 87 publications

Quantification of the Emission of Atmospheric Microplastics and Nanoplastics via Sea Spray

Quantification of the Emission of Atmospheric Microplastics and Nanoplastics via Sea Spray

Fabrication of an Optoplasmonic Raft with Improved SERS Performance Detecting Methamphetamine through Bubble Enrichment

Modeling of vertical microplastic transport by rising bubbles

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