Evaluation of Acer rubrum Tree Bark as a Bioindicator of Atmospheric Heavy Metal Pollution in Toronto, Canada

Yousaf, Muhammad; Mandiwana, Khakhathi L.; Baig, K. Shahzad; Lu, Junjie

doi:10.1007/s11270-020-04758-w

Cited by 8 publications

(3 citation statements)

References 49 publications

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“…Youssaf et al 23 measured tree barks as a bioindicator to assess air pollution in downtown Toronto and reported high levels of Pb and Mn in trees on the roadside with heavy tra c. Our study also found that the urban group's Mn and Pb levels were signi cantly higher.…”

Section: Discussionsupporting

confidence: 62%

Comparison of Levels of Heavy Metals in Nasal Concha Tissues in Rural and Urban Regions

Öner,

Kurt,

Üçüncü

2024

Preprint

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Background: Heavy metal exposure has recently become a problem due to the increasing environmental pollution as urbanization expands. Objective: This prospective case control study was conducted to compare levels of heavy metals in the nasal concha of the patients living in urban and rural who underwent partial inferior concha resection. Methods: Sixty-seven patients were divided into two groups: 38 rural patients and 29 urban patients. Lead (Pb), cadmium (Cd), mercury (Hg), copper (Cu), and manganese (Mn) levels were measured in inferior nasal concha by Inductively Coupled Plasma- Optical Emission Spectrometry. Results: Significance was considered at p < 0.05. The levels of Cu (0.24± 0.048 vs. 0.06± 0.019 µg/g) and Zn (3.29± 0.69 vs. 0.44± 0.14µg/g) of the rural patients were significantly higher compared to urban patients (p<0.001). There was no significant difference in the Cd level between groups. Pb (0.024± 0.009 vs. 0.008± 0.0002 µg/g) and Mn (0.273± 0.01 vs. 0.174± 0.05 µg/g) levels of urban patients were significantly higher than rural patients (p<0.001). Conclusions: Heavy metals accumulate in the nasal concha at different rates in rural and urban areas. Indicating the presence of heavy metals in turbinates and measuring their amount may be helpful for diagnostic purposes in diseases whose etiology is attributed to air pollution; however, the pathophysiology still needs to be clarified.

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Section: Discussionsupporting

confidence: 62%

Comparison of Levels of Heavy Metals in Nasal Concha Tissues in Rural and Urban Regions

Öner,

Kurt,

Üçüncü

2024

Preprint

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“…Compared to previous reports, the detected trace metal(loid)s in the outer bark samples exhibited much higher concentrations than those in urban areas in Thailand [66], Toronto, Canada [67], and three European cities [20]. Similar concentrations of Cu, Zn, Cr, and Sb but lower concentrations of Pb, As, and Cd were observed in oak (Quercus) in urban areas in Stassfurt, Germany [19].…”

Section: Trace Metal(loid) Accumulation In Vegetables Aerial Roots An...contrasting

confidence: 57%

Trace Metal(loid) Migration from Road Dust to Local Vegetables and Tree Tissues and the Bioaccessibility-Based Health Risk: Impacts of Vehicle Operation-Associated Emissions

Liu

Chen

Cui

et al. 2023

IJERPH

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Traffic activities release large amounts of trace metal(loid)s in urban environments. However, the impact of vehicle operation-associated emissions on trace metal(loid) enrichment in road dust and the potential migration of these trace metal(loid)s to the surrounding environment remain unclear. We evaluated the contamination, sequential fraction, and bioaccessibility of trace metal(loid)s in urban environments by assessing their presence in road dust, garden vegetables, and tree tissues, including bark and aerial roots, at a traffic-training venue impacted by vehicle operation emissions and, finally, calculated the bioaccessibility-based health risk. The results indicated a significant accumulation of trace metal(loid)s in road dust, with the highest lead (Pb), cadmium (Cd), and antimony (Sb) concentrations in the garage entrance area due to higher vehicle volumes, frequent vehicle starts and stops, and lower speeds. Aerial roots exposed to hill start conditions exhibited the highest Pb, Zn, and Sb levels, potentially caused by high road dust resuspension, confirming that this tree tissue is an appropriate bioindicator. Sequential extraction revealed high percentages of carbonate-, Fe/Mn oxide-, and organic/sulphide-associated fractions of Pb, copper (Cu), and zinc (Zn) in road dust, while most Cd, Cr, Ni, and Sb occurred as residual fractions. According to the potential mobilizable fractions in sequential extraction, the in vitro gastrointestinal method could be more suitable than the physiologically based extraction test to evaluate the bioaccessibility-related risk of traffic-impacted road dust. The bioaccessibility-based health risk assessment of the road dust or soil confirmed no concern about noncarcinogenic risk, while the major risk originated from Pb although leaded gasoline was prohibited before the venue establishment. Furthermore, the cancer risks (CRs) analysis showed the probable occurrence of carcinogenic health effects from Cd and Ni to adults and from Cd, Cr, and Ni to children. Furthermore, the Cd and Pb concentrations in the edible leaves of cabbage and radish growing in gardens were higher than the recommended maximum value. This study focused on the health risks of road dust directly impacted by vehicle emissions and provides accurate predictions of trace metal(loid) contamination sources in the urban environment.

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“…Wolswijk et al (2018) analisaram a distribuição de mercúrio em sedimentos, tecidos vegetais e animais na reserva florestal Matang Mangrove na Malásia e encontraram alta concentração de Hg nas folhas, proveniente da absorção pelo ar ou ela deposição atmosférica, quando comparado a outros tecidos vegetais. Yousaf et al (2020) analisaram as cascas de árvores no entorno de Toronto no Canadá e notaram que as amostras estavam fortemente enriquecidas com metais pesados, principalmente nos locais próximos às estradas com tráfego elevado de veículos. Além disso, Ishtiaq et al (2017) demonstraram que as folhas de espécies arbóreas podem ser usadas como bioindicadores de poluição do ar em zona urbana, pois os metais pesados e outros particulados provenientes do uso de veículos estão afetando diretamente as folhas das árvores, devido a sua capacidade de penetrar na folha, modificar ou destruir suas células e tecidos.…”

Section: Discussionunclassified

Arborização urbana como bioindicadora de poluição atmosférica por mercúrio: um estudo de caso com Moquilea tomentosa Benth. (Chrysobalanaceae) na região sul da Amazônia

Deecken

Andrade

Costa

et al. 2022

RSD

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O mercúrio (Hg) é considerado internacionalmente como um poluente global e possui alta taxa de dispersão a partir das suas fontes de emissão, devido ao transporte atmosférico. Considerando que esse metal é proveniente, tanto de fontes naturais, quanto antrópicas, é importante saber o quanto de Hg é emitido, as concentrações observadas no ambiente e estimar seus impactos sobre a saúde humana e dos ecossistemas. Dessa maneira, este estudo avaliou a presença de mercúrio no perímetro urbano de seis municípios na região norte de Mato Grosso, sul da Amazônia, por meio da análise de folhas da espécie arbórea Oiti, Moquilea tomentosa Benth. (Chrysobalanaceae), amplamente utilizada na arborização urbana nessa região. Os resultados evidenciaram diferenças significativas nas concentrações de mercúrio entre os municípios avaliados (ANOVA = p≤ 0,0001), indicando a presença desse metal pesado na atmosfera em todos os perímetros urbanos avaliados. O maior valor médio de Hg foi observado em Paranaíta (172,8 µg Kg-1), seguido por Alta Floresta (62,1 µg Kg-1), Carlinda (52,3 µg Kg-1), Nova Canaã do Norte (25,5 µg Kg-1), Colíder (19,3 Kg-1) e Nova Santa Helena (6,8 µg Kg-1). Entretanto, todas essas concentrações encontram-se dentro da faixa considerada aceitável. Assim, recomenda-se o uso de M. tomentosa como indicadora da deposição atmosférica de mercúrio em áreas urbanas, com a necessidade de estudos seguindo uma série temporal permitindo o estabelecimento de protocolos específicos para diferentes tipos de poluentes atmosféricos.

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Evaluation of Acer rubrum Tree Bark as a Bioindicator of Atmospheric Heavy Metal Pollution in Toronto, Canada

Cited by 8 publications

References 49 publications

Comparison of Levels of Heavy Metals in Nasal Concha Tissues in Rural and Urban Regions

Comparison of Levels of Heavy Metals in Nasal Concha Tissues in Rural and Urban Regions

Trace Metal(loid) Migration from Road Dust to Local Vegetables and Tree Tissues and the Bioaccessibility-Based Health Risk: Impacts of Vehicle Operation-Associated Emissions

Arborização urbana como bioindicadora de poluição atmosférica por mercúrio: um estudo de caso com Moquilea tomentosa Benth. (Chrysobalanaceae) na região sul da Amazônia

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