Trace elements in soil, plant and grain of corn plants cultivated in Latosols after sixteen years with application of sewage sludge
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Data
2020-03-01
Autores
Yada, Marcela Midori [UNESP]
Melo, Wanderley Jose de [UNESP]
Melo, Valeria Peruca de
Título da Revista
ISSN da Revista
Título de Volume
Editor
Assoc Brasileira Engenharia Sanitaria Ambiental
Resumo
One of the biggest concerns about the application of sewage sludge to the soil is due to contamination by trace elements, their persistence in the environment and high toxicity. The objective of this work was to evaluate the contents of the elements As, Ba, Cd, Cr, Cu, Hg, Mo, Ni, Pb, Se, and Zn in the soil, the plants, and the grains of corn, when grown in two latosols, after sixteen years with annual application of sewage sludge doses. The experiment was conducted under field conditions in Jaboticabal, SP. The experimental design was randomized blocks with 4 treatments and 5 replications. Treatments were: T1 = 0 control (mineral fertilization, without applying LE), T2 = 5 t ha(-1) LE, T3 = 10 t ha(-1) LE, and T4 = 20 t ha(-1) LE (dry basis). Applying LE doses of 10 and 20 t ha(-1) increased the available content of Cu in LVef soil and available levels of Cu, Ni, Pb and Zn in LVd soil, without exceeding the limits established by Brazilian legislation (prevention values). The levels of elements As, Ba, Cd, Cr, Hg, Mo, and Pb in maize grains remained below the limits established for human consumption.
Descrição
Palavras-chave
heavy metals, biosolids, bioavailability, municipal waste, environmental pollution
Como citar
Engenharia Sanitaria E Ambiental. Rio De Janeiro: Assoc Brasileira Engenharia Sanitaria Ambiental, v. 25, n. 2, p. 371-379, 2020.