Data/hora: 06/06/2024 13:31:26

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