Respiratory bioaccessibility and solid phase partitioning of potentially harmful elements in urban environmental matrices

Autor(es)

Friol Boim, Alexys Giorgia ^[1] ; Patinha, Carla ^[2] ; Wragg, Joanna ^[3] ; Cave, Mark ^[3] ; Ferracciu Alleoni, Luis Reynaldo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, Dept Soil Sci, BR-13418900 Piracicaba, SP - Brazil

^[2] Aveiro Univ, Geosci Dept, GEOBIOTEC, Campus Santiago, P-3810193 Aveiro - Portugal

^[3] British Geol Survey, Environm Sci Ctr, Nicker Hill, Nottingham NG12 5GG, Notts - England

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 765, APR 15 2021.
• Citações Web of Science: 0

Resumo

Studies regarding the role of geochemical processes in urban environmental matrices (UEM) and their influence on respiratory bioaccessibility in humans are scarce in humid tropical regions, especially in Brazil. Contaminated UEM are potentially hazardous to humans if particles <10 mu m in diameter are inhaled and reach the tracheobronchial region. In this study, we evaluated samples collected in Brazilian UEMs with a large environmental liability left by former mining industries and in a city with strong industrial expansion. UEM samples were classified into soil, sediment and mine tailings according to the characteristics of the collection sites. The respiratory bioaccessibility of potentially harmful elements (PHE) was evaluated using artificial lysosomal fluid (ALF, pH 4.5), and the BCR-sequential extraction was performed to evaluate how the respiratory bioaccessibility of the PHE was related to the solid phase partitioning. The bioaccessible fraction (BAF) ranged from 54 to 98% for Cd; 21-89% for Cu; 46-140% for Pb, 35-88% for Mn and; 41-84% for Zn. The average BAF of the elements decreased in the following order: Soil: Cd> Pb> Mn> Zn> Cu; Tailing: Pb> Cd> Zn> Mn> Cu; and Sediments: Pb> Mn> Cd> Zn> Cu. BCR-fractions were useful to predict the PHE bioaccessibility (R-2 = 0.79-0.98), thus suggesting that particle geochemistry and mineralogy can influence PHE behaviour in the pulmonary fluid. Therefore, this approach provides a combination of quantitative and qualitative data, which allows us to carry out a more realistic assessment of the current situation of the potentially contaminated site and possible alternatives for decision making by the stakeholders. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 15/19332-9 - Bioacessibilidade oral e respiratória de elementos potencialmente tóxicos no solo e em sedimentos urbanos
• Beneficiário: Alexys Giorgia Friol Boim
• Modalidade de apoio: Bolsas no Brasil - Doutorado