Monitoring and mitigation of toxic heavy metals and arsenic accumulation in food crops: A case study of an urban community garden
| Autor: | Didra Felix, Amy Work, Ilya Zaslavsky, Julian I. Schroeder, Paul L. Watson, Alexander J. Scavo, Dan Zhu, Fatima Alcantara, Keith Pezzoli, Yasman Zarabi, Qi Yu, Andrew M. Cooper |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
cadmium
chemistry.chemical_element Plant Science phytoremediation 010501 environmental sciences 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) Toxicology ion transport 03 medical and health sciences Nutrient food Dry weight ionomics 14. Life underwater Ecology Evolution Behavior and Systematics Arsenic 0105 earth and related environmental sciences Original Research 2. Zero hunger Cadmium 030505 public health Ecology arsenic Botany food and beverages Swiss Chard Contamination heavy metal 6. Clean water food.food Phytoremediation chemistry Pb lead QK1-989 Environmental science Metalloid tomato/Solanum lycopersicum 0305 other medical science |
| Zdroj: | Plant Direct, Vol 4, Iss 1, Pp n/a-n/a (2020) Plant Direct |
| ISSN: | 2475-4455 |
| Popis: | Urban community gardens have increased in prevalence as a means to generate fresh fruits and vegetables, including in areas lacking access to healthy food options. However, urban soils may have high levels of toxic heavy metals, including lead and cadmium and the metalloid arsenic, which can lead to severe health risks. In this study, fruit and vegetable samples grown at an urban community garden in southeastern San Diego, the Ocean View Growing Grounds, were sampled repeatedly over a four‐year time period in order to measure potential contamination of toxic heavy metals and metalloids and to develop solutions for this problem. Metal nutrient, heavy metal, and metalloid concentrations were monitored in the leaf and fruit tissues of fruit trees over the sampling period. Several of the fruit trees showed uptake of lead in the leaf samples, with Black Mission fig measuring 0.843–1.531 mg/kg dry weight and Mexican Lime measuring 1.103–1.522 mg/kg dry weight over the sampling period. Vegetables that were grown directly in the ground at this community garden and surrounding areas showed arsenic, 0.80 + 0.073 mg/kg dry weight for Swiss chard, and lead, 0.84 ± 0.404 mg/kg dry weight for strawberries, in their edible tissues. The subsequent introduction of raised beds with uncontaminated soil is described, which eliminated any detectable heavy metal or metalloid contamination in these crops during the monitoring period. Recommendations for facilitating the monitoring of edible tissues and for reducing risk are discussed, including introduction of raised beds and collaborations with local universities and research groups. |
| Databáze: | OpenAIRE |
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