Transport of polystyrene nanoplastics in natural soils: Effect of soil properties, ionic strength and cation type

Wu, Xiaoqiang; Lyu, Xueyan; Zheng-yu, LI; Gao, Bin; Zeng, Xiankui; Wu, Jichun; Sun, Yuanyuan

doi:10.1016/j.scitotenv.2019.136065

Cited by 178 publications

(107 citation statements)

References 42 publications

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“…Wu et al [139] investigated the movement of polystyrene nanoplastics (100 nm) in desert (pH 9.75; iron (Fe) 2.69% and aluminum (Al) 12.6%), black (pH 6.57; Fe 4.04% and Al 15.9%) and red (pH 4.97; Fe 6.57% and Al 26.9%) soils and determined that the soil mineral content (specifically relating to Fe/Al oxides) and pH levels were critical to the movement of polystyrene nanoplastics. The higher the pH and the lower the Fe/Al oxide content, the higher the movement of the nanoplastics in the soil.…”

Section: Fate and Behaviour Of Micro-and Nanoplastics And Their Ecolomentioning

confidence: 99%

Microplastics and Nanoplastics in the Freshwater and Terrestrial Environment: A Review

Boyle

Örmeci

2020

Water

173

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This review is a critical analysis of current freshwater and terrestrial research with an emphasis on transport, behaviour, fate and subsequent ecological impacts that plastic pollution poses. The current methods of extraction and evaluation of organic-rich samples are also explored for both micro- and nanoplastics. Furthermore, micro- and nanoplastics are discussed with reference to their environmental and health implications for biota. Regulations imposed on the manufacture and distribution of plastics globally are also noted. Within the review, the current literature has been presented and knowledge gaps identified. These include the characterization and quantification of micro- and nanoplastics entering and forming within the freshwater and terrestrial environment, the fate and behaviour of micro- and nanoplastics under varying conditions and the impacts of micro- and nanoplastics on freshwater and terrestrial ecosystems.

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Section: Fate and Behaviour Of Micro-and Nanoplastics And Their Ecolomentioning

confidence: 99%

Microplastics and Nanoplastics in the Freshwater and Terrestrial Environment: A Review

Boyle

Örmeci

2020

Water

173

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“…The decreased breakthrough was primarily because the large hetero-aggregates between MPs-iron oxides were trapped by the quartz sand (Li et al, 2019a). Another study also verified that with the increase of Fe/Al content in three natural soils, the mobility of PS NPs decreased after the addition of different contents of Fe 2 O 3 and Al 2 O 3 due to the stronger aggregation with Fe/Al oxides (Wu et al, 2020).…”

Section: Temperaturementioning

confidence: 67%

“…The pH can directly influence the surface charge of MPs/NPs, porous media and soil organic matters, and the surface charge can affect the electrostatic interaction. Wu et al collected three kinds of soil with different Fe/Al oxides (desert soil, DS, Fe‐2.69%, Al‐12.6%; black soil, BS, Fe‐4.04%, Al‐15.9%; red soil, RS, Fe‐6.57%, Al‐26.9%) (Wu et al., 2020). The pH of DS, BS and RS were 9.75, 6.57 and 4.97, respectively.…”

Section: Influencing Factors On Mps/nps Transport In Soilmentioning

confidence: 99%

“…The surface positive charge densities of three soils decreased in the order of DS > BS > RS. As the pH rises from 4.97 to 9.75, the negative zeta potential of PS MPs/NPs increased from −25.7 to −36.4 mV (Wu et al., 2020). When PS MPs/NPs transport in these soils, PS MPs/NPs have the strongest electrostatic interaction with DS, and the migration rates of PS MPs/NPs in the three soils decreased in the trend of RS > BS > DS (Wu et al., 2020).…”

Section: Influencing Factors On Mps/nps Transport In Soilmentioning

confidence: 99%

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Transport and transformation of microplastics and nanoplastics in the soil environment: A critical review

Liu

Shao

Liu

et al. 2021

Soil Use and Management

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Microplastics (MPs, 0.1 μm ~ 5 mm) and nanoplastics (NPs, ≤0.1 μm) are emerging pollutants in the soil environment, which are subdivided into primary and secondary MPs/ NPs (Akdogan & Guven, 2019). Primary MPs/NPs refer to the artificial plastic beads used in personal care products (PCPP) and other plastic products, such as shampoos, shower gels, lipsticks and various synthetic textiles (Akdogan & Guven, 2019). Secondary MPs/NPs are formed by weathering and fragmentation of plastics under the effects of ultraviolet radiation (Akdogan & Guven, 2019; Liu & Wang, 2020b), biodegradation and mechanical stress (Guo et al., 2020;Lu et al., 2018). The United Nations sustainable development goals (SDG) pay great attention to reduce the soil pollution (Bouma, 2019a;Bouma et al., 2019b). The pollution caused by MPs/NPs was listed as one of the top ten environmental problems by United Nations Environment Programme in 2014 (Ng et al., 2018). Approximately 79% of global plastic waste is accumulated in landfills (Ng et al., 2018). The

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“…The DLVO calculations indicate a distinct decrease in the secondary energy minimum between N-CDs and quartz and a decrease in the distance of energy minimum position with the increased IS, especially in CaCl 2 solutions ( Figure S2D-F). Therefore, the N-CDs are likely to occupy reversible adsorption sites on the quartz surfaces at the secondary energy minima [27,28].…”

Section: N-cd Aggregation and N-cd-quartz Interactionsmentioning

confidence: 99%

Transport of N-CD and Pre-Sorbed Pb in Saturated Porous Media

et al. 2020

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Carbon dots (CDs) are a new type of nanomaterials of the carbon family with unique characteristics, such as their small size (e.g., <10 nm), high water solubility, low toxicity, and high metal affinity. Modification of CDs by Nitrogen functional groups (N-CDs) enhances their metal adsorption capacity. This study investigated the influences of pH (4, 6, and 9), ionic strength (1, 50, and 100 mM), and cation valency (Na+ and Ca2+) on the competitive adsorption of Pb to quartz and N-CD surfaces, the transport and retention of N-CDs in saturated porous media, and the capacity of N-CDs to mobilize pre-adsorbed Pb in quartz columns. Pb adsorption was higher on N-CDs than on quartz surfaces and decreased with increases in ionic strength (IS) and divalent cations (Ca2+) concentration. N-CD mobility in quartz columns was highest at pH of 9- and 1-mM monovalent cations (Na+) and decreased with decreases in pH and increases in ionic strength and ion valency. N-CDs mobilized pre-adsorbed Pb from quartz due to the higher adsorption affinity of Pb to N-CD than to quartz surfaces. These findings provide valuable insights into the transport, retention, and risk assessment of lead in the presence of carbon-based engineered nanoparticles.

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Transport of polystyrene nanoplastics in natural soils: Effect of soil properties, ionic strength and cation type

Cited by 178 publications

References 42 publications

Microplastics and Nanoplastics in the Freshwater and Terrestrial Environment: A Review

Microplastics and Nanoplastics in the Freshwater and Terrestrial Environment: A Review

Transport and transformation of microplastics and nanoplastics in the soil environment: A critical review

Transport of N-CD and Pre-Sorbed Pb in Saturated Porous Media

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