Cadmium, copper and lead levels in different cultivars of lettuce and soil from urban agriculture
| Autor: | Eliana Aparecida Nonato Knupp, José Bento Borba da Silva, Flávia Beatriz Custódio, Maria Beatriz Abreu Glória, Bruno M. Dala-Paula, Helena Eugênia Leonhardt Palmieri |
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| Rok vydání: | 2018 |
| Předmět: |
Health
Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences Toxicology 01 natural sciences Soil Vegetables Sustainable agriculture Humans Soil Pollutants Urban agriculture Inductively coupled plasma mass spectrometry 0105 earth and related environmental sciences Cadmium Spectrophotometry Atomic Agriculture Gardening 04 agricultural and veterinary sciences General Medicine Lettuce Contamination Pollution Soil contamination Trace Elements Lead chemistry Environmental chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Environmental Pollution Graphite furnace atomic absorption Brazil Copper Environmental Monitoring |
| Zdroj: | Environmental Pollution. 242:383-389 |
| ISSN: | 0269-7491 |
| Popis: | Urban agriculture plays an important role in sustainable food supply. However, because of the atmospheric pollution and soil contamination associated with urban areas, this activity may be of concern. In fact, contamination of soil with metals and the transference of contaminants to vegetables can represent health and safety risks associated with urban agriculture. The objective of this study was to evaluate the concentrations of selected trace metals (cadmium, copper and lead) in three lettuce cultivars produced in three different urban gardens in the metropolitan region of Belo Horizonte, Brazil and their respective soils. Samples of lettuce and soil were analyzed by inductively coupled plasma mass spectrometry (ICP-MS) and graphite furnace atomic absorption spectrometry (AAS-GF), respectively, and their transfer coefficients were calculated. The methods were optimized and were fit for the purpose. Copper was the prevalent metal found in soils and lettuce, with an average of 27.9 ± 13.9 and 0.608 ± 0.157 mg kg−1 respectively, followed by lead (19.4 ± 7.7 and 0.037 ± 0.039 mg kg−1), and cadmium (0.16 ± 0.03 and 0.009 ± 0.005 mg kg−1). Cadmium presented the largest transfer coefficients, ranging from 0.34 to 1.84 with an average of 0.92 ± 0.45, which may indicate a potential risk of accumulation in vegetables in the case of high soil contamination. A significant positive correlation was observed (p |
| Databáze: | OpenAIRE |
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