Preliminary investigation on effects of size, polymer type, and surface behaviour on the vertical mobility of microplastics in a porous media

Ranjan, Ved Prakash; Joseph, Anuja; Sharma, Hari Bhakta; Goel, Sudha

doi:10.1016/j.scitotenv.2022.161148

Cited by 31 publications

(18 citation statements)

References 27 publications

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“…The processes of transport and binding of MPs to the substrate depend on particle properties, soil properties, and environmental factors [39,87,92]. Recent column experiments (Table 1) have investigated the impact of different environmental factors or particle properties on the transport or retention behaviour of MPs [87,[94][95][96][97][98][99][100].…”

Section: Transport Of Mps Through the Soil And The Unsaturated Zone T...mentioning

confidence: 99%

“…The ratio between the size of the MP (dMP) and the size of the soil particles (dMedia) is a major factor influencing this process. Studies by Gao et al [98], Ranjan et al [97], and Waldschläger et al [96] have shown that MPs tend to migrate deeper into the soil when the ratio of dMP/dMedia is less than 0.11. This ratio has been identified as the most important factor influencing the migration of MPs [98].…”

Section: Transport Of Mps Through the Soil And The Unsaturated Zone T...mentioning

confidence: 99%

“…In experiments with dry-wet cycles in a sandy soil column, O'Connor et al [100], Ranjan et al [97], and Gao et al [98] found that weather patterns involving rainfall events followed by dry periods determined the depth of MP transport more than the volume of water flowing through the column.…”

Section: Transport Of Mps Through the Soil And The Unsaturated Zone T...mentioning

confidence: 99%

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Microplastics in Groundwater: Pathways, Occurrence, and Monitoring Challenges

Colmenarejo Calero,

Kovač Viršek,

Mali

2024

Water

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Microplastics (MPs), defined as plastic particles measuring less than 5 mm, are considered an emerging pollutant. Their presence in the water cycle and their interaction with ecological processes pose a significant environmental threat. As groundwater (GW) represents the primary source of drinking water, monitoring MPs in GW and investigating their potential sources and pathways is of urgent importance. This article offers a comprehensive overview of the primary contamination pathways of MPs from surface water, seawater, and soil into the GW. Moreover, it presents an examination of the occurrence of MPs in GW and identifies the challenges associated with their monitoring in GW. This study also discusses the difficulties associated with comparing research results related to MPs in GW, as well as indicating the need for implementing standardised techniques for their sampling and detection. On the basis of our experience and the literature review, we highlight the importance of understanding the specific hydrogeological and hydrogeographic conditions, collecting representative samples, using sampling devices with comparable specifications and comparable laboratory techniques for MP identification, and preventing contamination at all stages of the monitoring process. This review offers valuable insights and practical guidelines on how to improve the reliability and comparability of results between studies monitoring MPs in GW.

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Section: Transport Of Mps Through the Soil And The Unsaturated Zone T...mentioning

confidence: 99%

Section: Transport Of Mps Through the Soil And The Unsaturated Zone T...mentioning

confidence: 99%

Section: Transport Of Mps Through the Soil And The Unsaturated Zone T...mentioning

confidence: 99%

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Microplastics in Groundwater: Pathways, Occurrence, and Monitoring Challenges

Colmenarejo Calero,

Kovač Viršek,

Mali

2024

Water

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“…Previous results have shown that the transport behavior of microplastics in saturated porous media is influenced by hydrochemical conditions (e.g., ionic strength, pH, and cation type), size of microplastic particles, fluid conditions, surface properties and types of the media or microplastics, and the dissolved organic matter (DOM) present in soil. − As an ubiquitous substrate in soil, DOM can interact with microplastics and regulate the transport of microplastics. , However, the regulation of PS mobility by DOM depends on the physicochemical properties of DOM. , There are several different types of DOM in soil, each with different properties. For example, humic acid (HA), the most abundant DOM in soil and freshwater systems and is often used as a model DOM, , can improve the stability of nanoplastics by promoting electrostatic repulsion and steric hindrance with nanoplastics .…”

Section: Introductionmentioning

confidence: 99%

Interaction of Dissolved Organic Matters and Microplastics Regulates the Transport of Microplastics in Saturated Porous Media

Tan,

Feng,

Bian

et al. 2024

ACS EST Eng.

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The transport behavior of microplastics in soil environments is significantly affected by dissolved organic matter (DOM). However, the regulation of different types of DOM on the transport of microplastics in media is poorly understood, especially at a quantitative level. In this study, we found that three types of DOM, humic acid (HA), bovine serum albumin (BSA), and sodium alginate (SA), promoted the transport of polystyrene microplastics (PS) in column experiments. The transport of PS was stronger with increasing DOM concentrations. Among the three types of DOM, HA promoted the mobility of PS the most due to electrostatic repulsion and steric hindrance. Through the combination of Derjaguin−Landau−Verwey−Overbeek (DLVO) theory, isothermal titration calorimetry (ITC), and colloidal atomic force microscopy (AFM), we found that the interactions between PS and HA, as well as the BSA, were mainly van der Waals forces, hydrogen bonding, and hydrophobic forces. In contrast, the interactions between PS and SA were mostly hydrogen bonding and electrostatic forces. The results provide a deep understanding of the interfacial interaction of microplastics and DOM in the transport process, based on both experimental measurements and model predictions, and are of great significance to evaluate the fate of microplastics in soil environments.

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“…A variant of (ii) is "MP concentration" , which is the number of MPs, however per mL of water measured at the outlet; (iii) "total mass recovery" (Y. : the ratio of MP concentration to that of a tracer (measured from the two breakthrough curves, BTC); (iv) "breakthrough concentration" (Dong et al, 2021): MP concentration relative to that in a injected suspension via which MPs were introduced (measured from the BTC). Depth-based metrics include (v) "maximum penetration depth" (Ranjan et al, 2023); (vi) "depth ratio" (Cohen and Radian, 2022): relative number of particles reaching the maximum depth in which any MPs were found; and (vii) "relative mobility" (X. Zhang et al,2022b): number MPs in a certain location (depth) normalized to the total number of MPs (in the entire soil and effluent water).…”

Section: Introductionmentioning

confidence: 99%

Microplastics transport in soils: A critical review

Li,

Bogush,

Wiel

et al. 2024

Preprint

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Microplastics (MPs) in terrestrial environments are an emerging contaminant of huge concern to ecosystems and human health. However, our understanding of the MPs fate, particularly their transport mechanisms, remains elusive. This knowledge gap arises from the multiplicity of coupled physical, chemical and biological processes and parameters affecting MPs transport, together with scarcity of systematic studies that aim to isolate their individual effects. In this paper, we provide a critical review of the state-of-the-art in our understanding of MPs transport, highlight knowledge gaps, and suggest future research to bridge them. We classify the governing factors into four main categories: (i) MPs properties; (ii) soil properties; (iii) hydrological conditions; and (iv) biological activity. Our analysis highlights the intricacy of MPs transport, showing that seemingly non-monotonic trends and even complete lack of correlation between some parameters and MPs transport could be explained by the interference (co-effects) with other parameters and processes.

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Preliminary investigation on effects of size, polymer type, and surface behaviour on the vertical mobility of microplastics in a porous media

Cited by 31 publications

References 27 publications

Microplastics in Groundwater: Pathways, Occurrence, and Monitoring Challenges

Microplastics in Groundwater: Pathways, Occurrence, and Monitoring Challenges

Interaction of Dissolved Organic Matters and Microplastics Regulates the Transport of Microplastics in Saturated Porous Media

Microplastics transport in soils: A critical review

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