The influence of atmospheric particles on the elemental content of vegetables in urban gardens of Sao Paulo, Brazil
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Environmental Pollution
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Although urban horticulture provides multiple benefits to society, the extent to which these vegetables
are contaminated by the absorption of chemical elements derived from atmospheric deposition is unclear. This study was designed to evaluate the influence of air pollution on leafy vegetables in community
gardens of Sao Paulo, Brazil. Vegetable seedlings of Brassica oleracea var. acephala (collard greens) and
Spinacia oleracea (spinach) obtained in a non-polluted rural area and growing in vessels containing
standard uncontaminated soil were exposed for three consecutive periods of 30, 60 and 90 days in 10
community gardens in Sao Paulo and in one control site. The concentrations of 17 chemical elements
(traffic-related elements and those essential to plant biology) were quantified by Inductively Coupled
Plasma Mass Spectrometry (ICP-MS). Tillandsia usneoides L. specimens were used as air plant biomonitors. The concentrations of As, Cd, Cr and Pb found in vegetables were compared to the recommended values for consumption. Principal Component Analysis (PCA) was used to cluster the elemental
concentrations, and Generalized Linear Models (GLMs) were employed to evaluate the association of the
factor scores from each PCA component with variables such as local weather, traffic burden and vertical
barriers adjacent to the gardens. We found significant differences in the elemental concentrations of the
vegetables in the different community gardens. These differences were related to the overall traffic
burden, vertical obstacles and local weather. The Pb and Cd concentrations in both vegetables exceeded
the limit values for consumption after 60 days of exposure. A strong correlation was observed between
the concentration of traffic-related elements in vegetables and in Tillandsia usneoides L. An exposure
response was observed between traffic burden and traffic-derived particles absorbed in the vegetables.
Traffic-derived air pollution directly influences the absorption of chemical elements in leafy vegetables,
and the levels of these elements may exceed the recommended values for consumption.
Como referenciar
AMATO LOURENCO, LUIS F.; MOREIRA, TIANA C.L.; SOUZA, VANESSA C. de O.; BARBOSA JUNIOR, FERNANDO; SAIKI, MITIKO; SALDIVA, PAULO H.N.; MAUAD, THAIS. The influence of atmospheric particles on the elemental content of vegetables in urban gardens of Sao Paulo, Brazil. Environmental Pollution, v. 216, p. 125-134, 2016. DOI: 10.1016/j.envpol.2016.05.036. Disponível em: http://repositorio.ipen.br/handle/123456789/26537. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.