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Innovative Characterization of Particulate Matter Deposited on Urban Vegetation Leaves through the Application of a Chemical Fractionation Procedure

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  • Martina Ristorini

    (Department of Bioscience and Territory, Università degli Studi del Molise, 86090 Pesche (IS), Italy
    Institute of Research on Terrestrial Ecosystems (IRET), National Research Council (CNR), 05010 Porano (TR), Italy)

  • Chiara Baldacchini

    (Institute of Research on Terrestrial Ecosystems (IRET), National Research Council (CNR), 05010 Porano (TR), Italy
    Biophysics and Nanoscience Centre, Department of Ecological and Biological Sciences (DEB), Università degli Studi della Tuscia, 01100 Viterbo, Italy)

  • Lorenzo Massimi

    (Department of Chemistry, Università degli Studi di Roma “La Sapienza”, Piazzale Aldo Moro, 5, 00185 Roma, Italy)

  • Gregorio Sgrigna

    (Institute of Research on Terrestrial Ecosystems (IRET), National Research Council (CNR), 05010 Porano (TR), Italy)

  • Carlo Calfapietra

    (Institute of Research on Terrestrial Ecosystems (IRET), National Research Council (CNR), 05010 Porano (TR), Italy)

Abstract

In this study, we have evaluated the efficiency of a chemical fractionation procedure for the characterization of both the water-soluble and the insoluble fraction of the main elemental components of particulate matter (PM) deposited on urban leaves. The proposed analytical approach is based on the chemical analysis of leaf washing solutions and membrane filters used for their filtration. The ionic concentration of leaf washing solutions was compared with their electrical conductivity, making it a valuable proxy for the quantification of the water-soluble and ionic fraction of leaf deposited PM. The chemical composition of both the water-soluble and the insoluble fraction of PM, resulting from this fractionation procedure, was compared with results obtained by scanning electron microscopy coupled with energy-dispersed X-Rays spectroscopy (SEM/EDX) and processed through chemometrics. Results obtained proved that the proposed approach is able to provide an estimation of total leaf deposited PM and it is highly reliable for the evaluation of the emission impact of different PM sources, being able to increase the selectivity of PM elemental components as specific source tracers; consequently providing useful information also for the assessment of human health risks.

Suggested Citation

  • Martina Ristorini & Chiara Baldacchini & Lorenzo Massimi & Gregorio Sgrigna & Carlo Calfapietra, 2020. "Innovative Characterization of Particulate Matter Deposited on Urban Vegetation Leaves through the Application of a Chemical Fractionation Procedure," IJERPH, MDPI, vol. 17(16), pages 1-19, August.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:16:p:5717-:d:396149
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    Cited by:

    1. Gevorg Tepanosyan & Chiara Baldacchini & Lilit Sahakyan, 2021. "Revealing Soil and Tree Leaves Deposited Particulate Matter PTE Relationship and Potential Sources in Urban Environment," IJERPH, MDPI, vol. 18(19), pages 1-12, October.

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