Abstract

GUTIERREZ C., Mauricio A. et al. Evaluation of Heavy Metal Content on a Sodic Soil Treated with Bio-waste. rev. cienc. [online]. 2016, vol.20, n.1, pp.11-26. ISSN 0121-1935.

The use of bio-wastes in agriculture contributes to the conservation of natural resources by recycling carbon and mineral elements. This investigation evaluated the variation of the content of heavy metals in soils affected by sodicity, on which alternating doses of bio-wastes were applied: vinasse, composted swine manure and sewage sludge from a wastewater treatment plant. Ten treatments with three doses were implemented for each bio-waste treatment in addition to the control treatment. During the investigation, two applications of bio-waste were performed with a temporal spacing of two months and three samples were taken: the f rst one corresponding to the initial condition of the area without the application of bio-wastes, and the remaining two samples were taken on the f rst and seventeenth month respectively after the application of bio-wastes. The results indicated a low intake of heavy metals on the soil in the three evaluations that were carried out. However, the use of these residues in agriculture requires specif c recommendations for each agro-climatic condition to prevent environmental damage

Keywords : Vinasse; sewage sludge; soil remediation; composted swine manure; heavy metal content.

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