Enrichment and transfer of polycyclic aromatic hydrocarbons (PAHs) through dust aerosol generation from soil to the air

Gao, Qianqian; Zhu, Xun; Wang, Qihuang; Zhou, Kai; Lu, Xiaohui; Wang, Zimeng; Wang, Xiaofei

doi:10.1007/s11783-023-1610-7

Cited by 5 publications

(1 citation statement)

References 46 publications

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“…Currently, microplastics are widely detected in soils (Figure S1). Moreover, since 2019, they have been reported to become airborne as part of soil particles, undergoing a transport mechanism like other soil particles. − Wind erosion is a physical phenomenon that lifts soil particles through the force of the wind and generates dust aerosol (hereafter referred to as dust), − through mechanisms such as saltation bombardment, aggregate disintegration, and aerodynamic entrainment. During this suspension process, the finer and lighter fraction of soil is more easily introduced into the atmosphere than the bulk of the soil. , With microplastic in soil of lower density compared to natural soil minerals (∼0.9–2.2 g·cm –3 versus ∼2.6–2.8 g·cm –3 ), microplastics are 30–60% lighter and more prone to being lifted by the wind .…”

Section: Introductionmentioning

confidence: 99%

Microplastic Emission from Soil-Air Interface

Yang,

Lu,

Peng

et al. 2024

Environ. Sci. Technol. Lett.

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To bridge the gap in understanding soil−air microplastic emissions, here we studied the soil−air transfer mechanism of microplastics with laboratory simulations using microplastic particles varying in size from 1 to 5000 μm. Our findings indicate that the size and shape of the microplastics together with the soil type and moisture levels are major determinants of the microplastic enrichment ratio (ER) in dust, overshadowing the role of polymer types. Notably, microplastic pellets larger than 20 μm do not enrich in dust, while microplastic fibers, even those as large as 500−5000 μm in length, do enrich in dust. Based on our ER measurement, the global microplastic size distribution in soil and dust aerosol production flux, we made a preliminary bottom-up assessment of global soil microplastic emissions of 48[0.4−1217] kilotons/year. Our pioneering findings on the global atmospheric soil−air microplastic flux provide insights that could guide the future development of a more precise microplastic emission inventory.

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Section: Introductionmentioning

confidence: 99%

Microplastic Emission from Soil-Air Interface

Yang,

Lu,

Peng

et al. 2024

Environ. Sci. Technol. Lett.

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Cu2O@TiO2 core-shell microspheres for naphthalene oxidation

Wang

Zhou

et al. 2023

J Porous Mater

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New Cu 2 O@TiO 2 core-shell microspheres were successfully prepared for the rst time in this paper. The XRD, N 2 adsorption-desorption, SEM, TEM, EDX and XPS characterizations were utilized to investigate the physical and chemical properties. The liquid phase oxidation of naphthalene was also carried out to test their catalytic performance. The characterization results indicating that the Cu 2 O microspheres were rstly formed by hydrothermal treatment and the rutile TiO 2 coating on the surface would be formed by the hydrolysis of tetrabutyl titanate. The Cu 2 O@TiO 2 -5.0 catalyst with the molar ratio of copper to titanium species as high as 5.0 has the largest surface area and maximum pore volume resulting from the integrated microspheres with rougher surface thickness of about 6.3 nm, and it showed higher catalytic performance in the naphthalene liquid phase oxidation. Naphthalene conversion of 43.2%, 1, 4naphthoquinone selectivity of 26.7% and phthalic anhydride selectivity of 53.4% can be obtained, and it only slightly decreased even after repeated use for 5 times. The method would provide a valuable theoretic reference for the hindrance of Cu 2 O rapid deactivation and the industrial application of the naphthalene oxidation to produce high valuable chemicals.

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Threshold friction velocity influenced by soil particle size within the Columbia Plateau, northwestern United States

Meng,

Sharratt

et al. 2024

J. Arid Land

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Enrichment and transfer of polycyclic aromatic hydrocarbons (PAHs) through dust aerosol generation from soil to the air

Cited by 5 publications

References 46 publications

Microplastic Emission from Soil-Air Interface

Microplastic Emission from Soil-Air Interface

Cu2O@TiO2 core-shell microspheres for naphthalene oxidation

Threshold friction velocity influenced by soil particle size within the Columbia Plateau, northwestern United States

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