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Níveis de contaminação por chumbo, cádmio e arsénico

Níveis de contaminação por chumbo, cádmio e arsénico


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About the Book

Em Kinshasa, a jardinagem de mercado é observada ao longo de estradas com alta frequência motorizada. O objectivo deste estudo é avaliar o seu nível de contaminação com metais vestigiais tóxicos, a fim de deduzir a distância segura de cultivo (zona útil). Os resultados obtidos mostram que: - Apesar dos efeitos combinados da precipitação, escorrimento e rega, é atestado que estes vegetais foram contaminados até uma distância maior à medida que se afasta da berma da estrada.- Os níveis de chumbo são inversamente proporcionais à distância das culturas hortícolas das estradas de Kasavubu e Saïo. No solo, as concentrações de chumbo são mais elevadas do que nos legumes e na água de irrigação. A não-renovação do solo após a colheita poderia justificar a acumulação de chumbo no solo. - O cádmio só é detectado em amostras de solo colhidas num raio de 3m da estrada. O desgaste dos pneus poderia ser a causa- O diferencial da cinética do Cádmio e do Arsénio é nulo, enquanto que foi observada uma correlação inversa entre os parâmetros físico-químicos (pH, OM e TOC) e os metais em estudo.


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Product Details
  • ISBN-13: 9786205922859
  • Publisher: KS Omniscriptum Publishing
  • Publisher Imprint: Edicoes Nosso Conhecimento
  • Height: 229 mm
  • No of Pages: 84
  • Spine Width: 5 mm
  • Width: 152 mm
  • ISBN-10: 6205922851
  • Publisher Date: 24 Apr 2023
  • Binding: Paperback
  • Language: Portuguese
  • Returnable: N
  • Weight: 186 gr


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