Background concentrations and quality reference values for some potentially toxic elements in soils of Sao Paulo State, Brazil

Autor(es)

Rodrigues Nogueira, Thiago Assis ^[1] ; Abreu-Junior, Cassio Hamilton ^{[2, 1]} ; Ferracciu Alleoni, Luis Reynaldo ^[3] ; He, Zhenli ^[4] ; Soares, Marcio Roberto ^[5] ; Vieira, Camila dos Santos ^[2] ; Frediani Lessa, Luis Gustavo ^[6] ; Capra, Gian Franco ^{[7, 8]}

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Sch Engn, Dept Plant Protect Rural Engn & Soils, BR-15385000 Ilha Solteira, SP - Brazil

^[2] Univ Sao Paulo, Ctr Nucl Energy Agr, Dept Plant Nutr, BR-13400970 Piracicaba, SP - Brazil

^[3] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Soil Sci, BR-13418900 Piracicaba, SP - Brazil

^[4] Univ Florida, Indian River Res & Educ Ctr, Inst Food & Agr Sci, Ft Pierce, FL 34945 - USA

^[5] Univ Fed Sao Carlos, Agr Sci Ctr, Dept Nat Resources & Environm Protect, BR-13600970 Araras, SP - Brazil

^[6] Sao Paulo State Univ, UNESP, Coll Agr Sci, Dept Soils & Environm Resources, BR-18610307 Botucatu, SP - Brazil

^[7] Univ Sassari, Dipartimento Architettura Design & Urbanist, Via Colombo 1, I-08100 Nuoro - Italy

^[8] Univ Sassari, Desertificat Res Ctr, Viale Italia 39, I-07100 Sassari - Italy

• Tipo de documento: Artigo Científico
• Fonte: Journal of Environmental Management; v. 221, p. 10-19, SEP 1 2018.
• Citações Web of Science: 5

Resumo

Quality reference values (QRV) for potentially toxic elements (PTE) in soils are established as a tool for prevention and monitoring of soil pollution. These values should be periodically revised in order to ensure soil safety for agricultural purposes. Brazil is market leader for several commodities; therefore, the safety of Brazilian soils is of worldwide strategic importance. The objective of this study was to determine the natural background concentrations and the QRV for As, Ba, Cd, Cr, Ni, Pb, Se, and Zn by investigating 30 representative pedotypes in the Sao Paulo State, one of the most important agro-industry economy at worldwide level. Multivariate statistical analysis was applied to determine the sources of PTE and their variability. The mean natural background concentrations of PTE in the soils were generally lower to those reported in literature. QRV, calculated for each element as the 75th and 90th percentiles, were lower (75th for As, Cd, Pb, and Zn), similar (75th for Ba, Cr, and Se) or above (90th for Ba, Cr, and Se and 75-90th for Ni) those previously proposed by the Brazilian environmental protection agencies. The results indicate that 75th percentile may be too restrictive. The PTE in the investigated soils appear to have comes mainly from two primary natural sources: a prevalent one of geogenic and a secondary of pedogenic origin. These results confirm the predominant natural source of selected PTE in the investigated soils, thus sustaining the possibility of using the data set to develop QRV for the State of Sao Paulo. (AU)

• Processo FAPESP: 07/59402-0 - Metais pesados em solos, plantas e produtos agricolas.
• Beneficiário: Thiago Assis Rodrigues Nogueira
• Modalidade de apoio: Bolsas no Brasil - Doutorado