EVALUATION OF TOXIC METALS IN LETTUCES GROWN OF AN URBAN GARDEN IN THE CITY OF SÃO PAULO, STATE OF SÃO PAULO, BRAZIL

• Autor(a) principal: Bortoletto, Luiz Alberto
• Data de Publicação: 2019
• Outros Autores: Lima, Erico da Silva, Fávaro, Deborah Inês Teixeira, Ulrich, João Cristiano, Souza, Vanessa Aparecida Feijó de, Cotrim, Marycel Elena Barboza, Bezerra, Fernanda de Campos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Brasileira de Ciências Ambientais (Online)
• Texto Completo: https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/589
• topic: fazenda urbana; hortaliças; elementos-traço; saúde humana; sustentabilidade.; urban farm; greenery; trace elements; human health; sustainability

Urban gardens bring social and food benefits, but air pollutants are harmful to health. So the question arises: Are garden foods safe? To this end, this study analyzed the green-leaf lettuce, the most consumed one in the state of São Paulo and a bioindicator of toxic metals. The study was conducted from August to October 2018, in an urban garden on the roof of a large shopping mall in the city of São Paulo, surrounded by heavy vehicular traffic. Two treatments were used: open-air cultivation (T1) and cultivation in a greenhouse with air control (T2), with 9 replicates each. After 60 days, the mean concentrations of As, Cd, Cr, Pb and Zn in the samples were quantified, which did not exceed the maximum limits recommended by ANVISA. From the results of the present study, it was concluded that lettuces grown in an urban garden presented no risk to human health and the greenhouse with air control (T2) reduced the Zn content in lettuces.