Data/hora: 06/06/2024 06:48:43

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 28/11/2017
Data da última atualização: | 10/08/2022
Autoria: | BORBA, R. P.; RIBEIRINHO, V. S.; CAMARGO, O. A. de; ANDRADE, C. A. de; KIRA, C. S.; COSCIONE, A. R.
Afiliação: | RICARDO PEROBELLI BORBA, IG-UNICAMP; VICTOR SANCHEZ RIBEIRINHO; OTAVIO ANTONIO DE CAMARGO, IAC; CRISTIANO ALBERTO DE ANDRADE, CNPMA; CARMEN SILVIA KIRA, Instituto Adolfo Lutz; ALINE RENEE COSCIONE, IAC.
Título: | Ion leaching and soil solution acidification in a vadose zone under soil treated with sewage sludge for agriculture.
Ano de publicação: | 2018
Fonte/Imprenta: | Chemosphere, v. 192, p. 81-89, 2018.
ISSN: | 0045-6535
DOI: | https://doi.org/10.1016/j.chemosphere.2017.10.112
Idioma: | Inglês
Conteúdo: | In this study, we performed monitoring of the soil solution (SS) over 10 years on a loamy/clayey-textured Dark Red Dystroferric Oxisol that received sewage sludge for agricultural purposes. The SS was obtained by lysimeters installed along the walls of a well at 1 m, 2 m, 3 m, 4 m and 5 m in depth. The major ions found in the SS were NO3-, SO42-, Cl-, Ca2+, Mg2+, Al3+, Pb2+, Cd2+ and Zn2+, and the pH level ranged from 4 to 6.5 along the profile. Throughout the first three years of monitoring, the pH to a 3-m depth became more acidic, and in the last year, this trend reached 5 m. At the 5-m depth, the pH decreased from 6.5 to 4.5 from the first to the last monitoring. The SS acidification was provoked by both nitrite oxidation and ion leaching. The leaching of H+ or the possible ion exchange/desorption of H+ due to the leached cations (Ca2+ and Mg2+) at the 4-m and 5-m depth caused the pH decrease. The ionic strength (IS) of the solution controlled the ion leaching. The sludge application increased the IS to 3 m, increasing the density of the soil charges and its ability to absorb ions. After the sludge application was completed, there was a decrease in IS of the SS as well as a decrease in ion absorption and retention abilities, which promoted leaching to greater depths. During the entire monitoring process, NO3-, Cd and Pb remained above the potability limit.
Palavras-Chave: | Ion leaching; Lodo de esgoto.
Thesagro: | Acidificação; Adubo de esgoto; Lodo residual; Solução do solo.
Thesaurus Nal: | Ionic strength; Sewage sludge; Soil acidification; Soil solution; Vadose zone.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (15879-1) - UPC - AP - DD -  -  -  - DIS