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Utilization of Bubbles and Oil for Microplastic Capture from Water

Joshua Saczek,Xiaoxue Yao,Vladimir Zivkovic,Mohamed Mamlouk,Steven Wang,Stevin S. Pramana,

Engineering doi: 10.1016/j.eng.2023.01.021

Abstract: 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.

Keywords： Microplastic     Floatation     Density separation     Wetting    

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Mechanism and characterization of microplastic aging process: A review

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1700-6

Abstract:

● Methods for estimating the aging of environmental micro-plastics were highlighted.

Keywords： Microplastics     Aging     Degradation     Characterization     Mechanism    

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Factors affecting the distribution of microplastics in soils of China

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1710-4

Abstract:

● Microplastic (MP) abundance in soil of China was highly heterogeneous

Keywords： Microplastic distribution     Microplastic heterogeneity     Effecting factors     Agriculture     Socio-economic    

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V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1578-8

Abstract:

● V-shaped substrate was obtained for SERS analysis of microplastics (diameter ≈ 1 μm).

Keywords： SERS     V-shaped     AAO     Microplastic     Atmospheric aerosol    

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Microplastic and Nanoplastic Pollution: Characterization, Transport, Fate, and Remediation Strategies

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 1,   Pages 12-12 doi: 10.1007/s11783-021-1446-y

Abstract: Microplastic (<5 mm) particles, for instance, have been detected in the aquatic environment globallyspecial issue successfully garnered a collection of research articles that addressed various topics of microplastic
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Abundance, spatial distribution, and physical characteristics of microplastics in stormwater detention ponds

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1724-y

Abstract: Despite extensive research on microplastics (MP) in marine environments, little is known about MP abundance and transport in terrestrial systems. There is, therefore, still little understanding of the main mechanisms driving the substantial transport of MP across different environmental compartments. Storm events can transport MP beyond boundaries, such as from the land to groundwater or the ocean, as has already been discovered for organic carbon transport. Urban stormwater detention ponds are suitable environments to study the impact of stormwater on the environmental fate and transport of MP. Herein, we investigate the longitudinal and vertical distribution of MP within two detention ponds with different physical characteristics. Soil samples were collected at various locations and from multiple depths (surface and subsurface layers) for measuring MP concentrations using fluorescence microscopy. Our findings show that MP are retained more near the inlet of the ponds, and MP of larger sizes were found more abundantly near inlets than outlets. We also found that MP mass and sizes decrease from surface soil to subsurface soil. In the pond, where vegetation (grass root network) was more considerable, MP were found more evenly distributed along the depth. In terms of shape, the fragments were the most abundant MP shape.

Keywords： Microplastic     Environmental transport     Soil pollution     Stormwater     Detention ponds    

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Algae (

Xuesong Liu, Jianmin Wang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1276-3

Abstract: Abstract • Micro-plastics (MPs) significantly increase Pb toxicity. • Algae reduce the combined toxicity of MP and Pb. • The toxicity increase comes from high soluble Pb and MP-Pb uptake. • The toxicity reduction might come from energy related pathway. Microplastics (MPs) have been recognized as a new class of emerging contaminants in recent years. They not only directly impact aquatic organisms, but also indirectly impact these organisms by interacting with background toxins in the environment. Moreover, under realistic environmental conditions, algae, a natural food for aquatic organisms, may alter the toxicity pattern related to MPs. In this research, we first examined the toxicity of MPs alone, and their effect on the toxicity of lead (Pb) on Ceriodaphnia dubia (C. dubia), a model aquatic organism for toxicity survey. Then, we investigated the effect of algae on the combined toxicity of MPs and Pb. We observed that, MPs significantly increased Pb toxicity, which was related to the increase in soluble Pb concentration and the intake of Pb-loaded MPs, both of which increased the accumulation of Pb in C. dubia. The presence of algae mitigated the combined toxicity of MPs and Pb, although algae alone increased Pb accumulation. Therefore, the toxicity mitigation through algae uptake came from mechanisms other than Pb accumulation, which will need further investigation.

Keywords： Microplastic     Lead     Toxicity     Algae     C. dubia    

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Data quality assessment for studies investigating microplastics and nanoplastics in food products: Are current data reliable?

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1694-0

Abstract:

● Data quality assessment criteria for MP/NPs in food products were developed.

Keywords： Microplastic     Nanoplastic     Food products     Data quality     Human health risk    

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Distribution, characteristics and daily fluctuations of microplastics throughout wastewater treatment plants with mixed domestic–industrial influents in Wuxi City, China

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 1,   Pages 6-6 doi: 10.1007/s11783-021-1440-4

Abstract:

• MPs were analyzed throughout three WWTPs with mixed domestic–industrial influents.

Keywords： Microplastic     Wastewater treatment plant     Mixed domestic-industrial influent     Characteristic     Daily fluctuation    

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New Insights into Microplastic Contamination in Different Types of Leachates: Abundances, Characteristics Article

Lei Zhang, Wentao Zhao, Liang Zhang, Zhenxiao Cai, Ruiqi Yan, Xia Yu, Damià Barceló, Qian Sui

Engineering 2024, Volume 37, Issue 6,   Pages 63-69 doi: 10.1016/j.eng.2024.02.008

Abstract:

Municipal solid waste (MSW) is an important destination for abandoned plastics. During the waste disposal process, large plastic debris is broken down into microplastics (MPs) and released into the leachate. However, current research only focuses on landfill leachates, and the occurrence of MPs in other leachates has not been studied. Therefore, herein, the abundance and characteristics of MPs in three types of leachates, namely, landfill leachate, residual waste leachate, and household food waste leachate, were studied, all leachates were collected from the largest waste disposal center in China. The results showed that the average MP abundances in the different types of leachates ranged from (129 ± 54) to (1288 ± 184) MP particles per liter (particles·L−1) and the household food waste leachate exhibited the highest MP abundance (p < 0.05). Polyethylene (PE) and fragments were the dominant polymer type and shape in MPs, respectively. The characteristic polymer types of MPs in individual leachates were different. Furthermore, the conditional fragmentation model indicated that the landfilling process considerably affected the size distribution of MPs in leachates, leading to a higher percentage (> 80%) of small MPs (20–100 μm) in landfill leachates compared to other leachates. To the best of our knowledge, this is the first study discussing the sources of MPs in different leachates, which is important for MP pollution control during MSW disposal.

Keywords： microplastics     landfill leachate     residual waste leachate     household food waste leachate     source    

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Title Author Date Type Operation

Utilization of Bubbles and Oil for Microplastic Capture from Water

Joshua Saczek,Xiaoxue Yao,Vladimir Zivkovic,Mohamed Mamlouk,Steven Wang,Stevin S. Pramana,

Journal Article

Mechanism and characterization of microplastic aging process: A review

Journal Article

Factors affecting the distribution of microplastics in soils of China

Journal Article

V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics

Journal Article

Microplastic and Nanoplastic Pollution: Characterization, Transport, Fate, and Remediation Strategies

Journal Article

Abundance, spatial distribution, and physical characteristics of microplastics in stormwater detention ponds

Journal Article

Algae (

Xuesong Liu, Jianmin Wang

Journal Article

Data quality assessment for studies investigating microplastics and nanoplastics in food products: Are current data reliable?

Journal Article

Distribution, characteristics and daily fluctuations of microplastics throughout wastewater treatment plants with mixed domestic–industrial influents in Wuxi City, China

Journal Article

New Insights into Microplastic Contamination in Different Types of Leachates: Abundances, Characteristics

Lei Zhang, Wentao Zhao, Liang Zhang, Zhenxiao Cai, Ruiqi Yan, Xia Yu, Damià Barceló, Qian Sui

Journal Article