Effect of surfactants on the transport of polyethylene and polypropylene microplastics in porous media

Jiang, Yanji; Yin, Xianqiang; Xi, Xianglong; Guan, Duo; Sun, Huimin; Wang, Nong

doi:10.1016/j.watres.2021.117016

Cited by 136 publications

(22 citation statements)

References 48 publications

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“…As charges and contact angles of the BSA foulants varied as a function of ionic strength, the electron-donor and -acceptor parameters of the surface tension changed as well (Table S9). The AB surface tension parameter of BSA foulants increased as the ionic strength increased, as can be derived from the reduced values of γ – , indicating that the BSA foulants as strong electron donors had been restrained and their oxygen groups were capped at higher ionic strength . However, both AB surface tension and electron-donor parameters of the TFN-CU5 sharply decreased, which suggests that the TFN-CU5 membrane surface is still dominated by electron-donor groups.…”

Section: Resultsmentioning

confidence: 95%

Thin-Film Nanocomposite Membranes with Nature-Inspired MOFs Incorporated for Removing Fluoroquinolone Antibiotics

Fang

Gong

Tang

et al. 2023

ACS Appl. Mater. Interfaces

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A nanofiltration membrane functionalized with metal–organic frameworks (MOFs) is promising to enhance micropollutant removal and realize wastewater reclamation. However, the current MOF-based nanofiltration membranes still suffer from severe fouling problems with an indefinable mechanism when used for antibiotic wastewater treatment. Hence, we report a nature-inspired MOF-based thin-film nanocomposite (TFN-CU) membrane to explore its rejection and antifouling behavior. Compared with unmodified membranes, the optimal TFN-CU5 membrane (with 5 mg·mL–1 C-UiO-66-NH2) had high water permeance (17.66 ± 1.19 L·m–2·h–1·bar–1), exceptional rejection for norfloxacin (97.92 ± 2.28%) and ofloxacin (95.36 ± 1.03%), and excellent long-term stability for treating synthetic secondary effluent with antibiotic rejection over 90%. Furthermore, it also showed superior antifouling capability (flux recovery up to 95.86 ± 1.28%) in bovine serum albumin (BSA) filtration after fouling cycles. Deriving from the extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) approach, the antifouling mechanism between BSA and the TFN-CU5 membrane was mainly attributed to the inhibited adhesion forces because the growing short-ranged acid–base interaction caused repulsive interfacial interactions. It is further revealed that BSA fouling behavior is slightly retarded under an alkaline environment, while strengthened in the presence of calcium ions and humic acid, as well as high ionic strength. In short, the nature-inspired MOF-based TFN membranes possess exceptional rejection and organic fouling resistance, giving insights into the design of antifouling membranes during antibiotic wastewater reclamation.

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Section: Resultsmentioning

confidence: 95%

Thin-Film Nanocomposite Membranes with Nature-Inspired MOFs Incorporated for Removing Fluoroquinolone Antibiotics

Fang

Gong

Tang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Chemical conditions in soils also affect the transport and retention of MnPs. For example, enhanced MnP transport was observed with increasing pH (Jiang et al 2021;Wu et al 2020) and decreasing ionic strength (Dong et al 2018;Hou et al 2020;Wu et al 2020). While smaller plastic particles (0.02 µm) do not show a change in transport in the presence of iron oxides, the transport of larger particles seems to be affected.…”

Section: Soil and Vadose Zonementioning

confidence: 94%

“…Moreover, ionic compounds show an impact on MnP transport. Generally, certain compounds such as KCl and CaCl2 are more effective in decreasing plastic mobility in porous media than others such as NaCl and MgCl2 (Jiang et al 2021;Yan et al 2020). Overall, cations with smaller ionic radii (Na + and Mg 2+ ) seem to have greater hydrated radii, which can result in weaker charge screening and obstruction of deposition through steric hindrance, which can thus decrease MnP retention in porous media.…”

Section: Soil and Vadose Zonementioning

confidence: 99%

“…Similar to soils, fine-grained unconsolidated aquifer material typically contains organic matter, which is an important parameter controlling transport of colloidal particles (Adrian et al 2019). Aquifer chemical properties such as pH or ionic strength can also significantly affect MnP transport and retention (Dong et al 2021b, Jiang et al 2021Wu et al 2020). In summary, MnP transport through subsurface porous media depends primarily on i) MnP properties such as size, density, shape, composition and surface characteristics; ii) environmental conditions of the porous medium such as grain size distribution and material composition, pore geometry, organic matter content, groundwater flow velocity, and groundwater or soil water chemistry, and iii) the interaction of MnPs with flora and fauna such as plant roots, biofilm formation or invertebrate activity.…”

Section: K Groundwatermentioning

confidence: 99%

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Microplastics and nanoplastics in agriculture—A potential source of soil and groundwater contamination?

Moeck

Davies

Krause

et al. 2022

Grundwasser - Zeitschrift der Fachsektion Hydrogeologie

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An overview of the current state of knowledge on the pollution of agricultural soils with microplastic and nanoplastic (MnP) particles is provided and the main MnP sources are discussed. MnP transport mechanisms from soil to groundwater, as well as the potential impact of MnPs on soil structure are considered, and the relevance of co-contaminants such as agrochemicals is further highlighted. We elaborate on why MnPs in soil and groundwater are understudied and how analytical capabilities are critical for furthering this crucial research area. We point out that plastic fragmentation in soils can generate secondary MnPs, and that these smaller particles potentially migrate into aquifers. The transport of MnP in soils and groundwater and their migration and fate are still poorly understood. Higher MnP concentrations in agricultural soils can influence the sorption behavior of agrochemicals onto soil grains while attachment/detachment of MnPs onto soil grains and MnP-agrochemical interactions can potentially lead to enhanced transport of both MnP particles and agrochemicals towards underlying groundwater systems.

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“…The transport of PNPs in the subsurface environment is expected to be highly affected by a wide range of processes, including sedimentation, aggregation, re-suspension, and entrapment [ 28 , 29 ]. These processes are significantly influenced by the properties of PNPs (i.e., particle size and surface properties), solution chemistries (i.e., ionic strength (IS), cation type, and pH), porous media (i.e., grain size and surface heterogeneity), flow condition, and coexisting pollutants [ 30 , 31 , 32 , 33 ]. However, the transport behaviors of PNPs and the mechanisms involved are still far from being fully understood.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of the Transport of Plastic Nanoparticles to Typical Phosphates Associated with Ionic Strength and Solution pH

Liu

Liang

Peng

et al. 2022

IJMS

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The influence of phosphates on the transport of plastic particles in porous media is environmentally relevant due to their ubiquitous coexistence in the subsurface environment. This study investigated the transport of plastic nanoparticles (PNPs) via column experiments, paired with Derjaguin–Landau–Verwey–Overbeek calculations and numerical simulations. The trends of PNP transport vary with increasing concentrations of NaH2PO4 and Na2HPO4 due to the coupled effects of increased electrostatic repulsion, the competition for retention sites, and the compression of the double layer. Higher pH tends to increase PNP transport due to the enhanced deprotonation of surfaces. The release of retained PNPs under reduced IS and increased pH is limited because most of the PNPs were irreversibly captured in deep primary minima. The presence of physicochemical heterogeneities on solid surfaces can reduce PNP transport and increase the sensitivity of the transport to IS. Furthermore, variations in the hydrogen bonding when the two phosphates act as proton donors will result in different influences on PNP transport at the same IS. This study highlights the sensitivity of PNP transport to phosphates associated with the solution chemistries (e.g., IS and pH) and is helpful for better understanding the fate of PNPs and other colloidal contaminants in the subsurface environment.

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Effect of surfactants on the transport of polyethylene and polypropylene microplastics in porous media

Cited by 136 publications

References 48 publications

Thin-Film Nanocomposite Membranes with Nature-Inspired MOFs Incorporated for Removing Fluoroquinolone Antibiotics

Thin-Film Nanocomposite Membranes with Nature-Inspired MOFs Incorporated for Removing Fluoroquinolone Antibiotics

Microplastics and nanoplastics in agriculture—A potential source of soil and groundwater contamination?

Sensitivity of the Transport of Plastic Nanoparticles to Typical Phosphates Associated with Ionic Strength and Solution pH

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