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- Title
Uso de resíduos orgânicos na atenuação de contaminação por cobre de calda bordalesa.
- Authors
Sprovieri Cipoleta, Nathalia; Simões da Silva, Laura Fernanda; Lopes-Assad, Maria Leonor R. C.
- Abstract
Bordeaux mixture, commonly used in organic production systems, can increase copper (Cu) levels in the soil. The objective of this work was to evaluate the potential of materials rich in organic compounds in the attenuation of Cu contamination in a clayey soil. Coconut fiber (FC), bokashi (BO) and leonardite (LE) were tested in three doses. The tests were mounted on a bench in PVC tubes with material of a Red Clay Latosol, which received three doses of Cu as a Bordeaux mixture. Regular percolate samplings were carried out, during the 47 days' trial, to determine the amount of Cu mobilized after application of water simulating rain during the test period. At the end, the content of Cu extracted by weak and strong acids was determined and the amount of Cu that remained retained was estimated. It was observed that FC and BO provided a decrease in the leached Cu content as a function of the increase of the applied doses, as opposed to the LE that provided an increase in Cu concentration in the percolate as a function of the increase of the applied doses. BO presented the lowest concentration of Cu in the percolate and the lowest concentrations retained in the soil. LE showed the highest concentration of Cu in the percolate and the highest concentrations retained in the soil. It is concluded that studies on the continued use of CB should be mandatory for monitoring soil and water, in order to reduce the risk of environmental contamination.
- Subjects
CLAY soils; SOIL pollution; CONCENTRATION functions; SOIL moisture; RAINWATER
- Publication
Ambiência, 2019, Vol 15, Issue 2, p289
- ISSN
1808-0251
- Publication type
Article
- DOI
10.5935/ambiencia.2019.02.01