Leaching of Heavy Metals in Soils Conditioned with Biosolids from Sewage Sludge
Material type:
ArticleSubject(s): Online resources:
In:
Floresta e Ambiente (Brazil) v. 26(special number n.1) p. 1-10; (2019)Summary:
ABSTRACT
A promising use of biosolids is as organic fertilizer in agricultural and forestry activities. However,
its composition might contain several pollutants, especially heavy metals, which may result
in an increase in the concentrations of these elements in the soil and the risk of groundwater
contamination. This study aimed to determine the leaching levels of ions in a Ferralsol (clayey
texture) and in a Planosol (sandy texture). The experiment was conducted in a greenhouse at
Embrapa Agrobiologia, Seropédica, Rio de Janeiro state. Soils were packed in PVC columns and
received 2 L/column of biosolids. The concentrations of heavy metals present in the biosolids
composition were below the limits established by the legislation (CONAMA 375). In addition,
the performed simulations showed the absence of contamination risk of soil or groundwater
and surface water, according to the limits allowed by CONAMA 375. However, it should be
emphasized the potential of nitrate leaching.
Keywords: contamination risk, chemical elements percolation, test with columns, risk analysis.
| Item type | Current library | Collection | Call number | Vol info | Status | Date due | Barcode |
|---|---|---|---|---|---|---|---|
Periódicos
|
Biblioteca Nacional de Agricultura - Binagri Agrobase - Periódicos | Periódicos agrícolas | 2019 26( n. especial 1) | Online | 2025-0453 |
Publicação on-line; 29 ref.; 3 tables; 1 illus.; Summary (En)
ABSTRACT
A promising use of biosolids is as organic fertilizer in agricultural and forestry activities. However,
its composition might contain several pollutants, especially heavy metals, which may result
in an increase in the concentrations of these elements in the soil and the risk of groundwater
contamination. This study aimed to determine the leaching levels of ions in a Ferralsol (clayey
texture) and in a Planosol (sandy texture). The experiment was conducted in a greenhouse at
Embrapa Agrobiologia, Seropédica, Rio de Janeiro state. Soils were packed in PVC columns and
received 2 L/column of biosolids. The concentrations of heavy metals present in the biosolids
composition were below the limits established by the legislation (CONAMA 375). In addition,
the performed simulations showed the absence of contamination risk of soil or groundwater
and surface water, according to the limits allowed by CONAMA 375. However, it should be
emphasized the potential of nitrate leaching.
Keywords: contamination risk, chemical elements percolation, test with columns, risk analysis.
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