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	Provedor de dados Agronomy (4) Autor Nascimento, Clístenes Williams Araújo do (4) Silva, Ygor Jacques Agra Bezerra da (4) Biondi, Caroline Miranda (2) Cantalice, José Ramon Barros (2) Ferreira, Tiago Osório (2) Silva, Yuri Jacques Agra Bezerra da (2) Singh, Vijay Pal (2) Souza Júnior, Valdomiro Severino de (2) Wilcox, Bradford Paul (2) van Straaten, Peter (2) Mais... Palavra-chave Chemical index of alteration (2) River pollution (2) Sediment quality (2) Soil conservation (2) Soil fertility (2) Soil genesis (2) Trace elements. (2) Ciência do Solo (1) Ciências Agrárias/Agronomia/Ciência do Solo soil science (1) Northeastern Brazil. (1) Northeastern Brazil. Ciência do Solo (1) Soil science (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2019 (2) 2018 (2) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Geochemical signatures and weathering rates in soils derived from different granites in contrasting climatic locations Agronomy Silva, Ygor Jacques Agra Bezerra da; Nascimento, Clístenes Williams Araújo do; Biondi, Caroline Miranda; van Straaten, Peter; Souza Júnior, Valdomiro Severino de; Ferreira, Tiago Osório. We studied the mineralogical properties and chemical composition of different granites using energy dispersive X-ray spectroscopy coupled with scanning electron microscopy to understand the relationship between granite signatures and soil characteristics, including weathering patterns and soil fertility status. The discriminant analysis (DA) was based on soil physical and chemical properties and was used to differentiate soils developed from I- and S-type granites across contrasting climatic conditions in northeast Brazil. The DA identified the highest values of organic carbon, clay and plant nutrients as key variables to recognize soil profiles derived from I-type granites. In contrast, the greater sand contents and Al saturation distinguished soils... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil science; Soil genesis; Soil fertility; Chemical index of alteration; Northeastern Brazil.; Ciência do Solo. Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39708 Heavy metal concentrations and ecological risk assessment of the suspended sediments of a multi-contaminated Brazilian watershed Agronomy Silva, Yuri Jacques Agra Bezerra da; Cantalice, José Ramon Barros; Singh, Vijay Pal; Nascimento, Clístenes Williams Araújo do; Wilcox, Bradford Paul; Silva, Ygor Jacques Agra Bezerra da. Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn was assessed using pollution indices, ecological risk assessment, statistical multivariate techniques and comparison with sediment quality guidelines. Suspended sediments of the upstream portion of the Ipojuca River are moderately contaminated, especially with Mn and As. On the other hand, sediments of the downstream section are highly contaminated, mainly with Zn, Pb, and As. Furthermore, the mean... Tipo: Info:eu-repo/semantics/article Palavras-chave: River pollution; Soil conservation; Sediment quality; Trace elements.. Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42620 Geochemical signatures and weathering rates in soils derived from different granites in contrasting climatic locations Agronomy Silva, Ygor Jacques Agra Bezerra da; Nascimento, Clístenes Williams Araújo do; Biondi, Caroline Miranda; van Straaten, Peter; Souza Júnior, Valdomiro Severino de; Ferreira, Tiago Osório. We studied the mineralogical properties and chemical composition of different granites using energy dispersive X-ray spectroscopy coupled with scanning electron microscopy to understand the relationship between granite signatures and soil characteristics, including weathering patterns and soil fertility status. The discriminant analysis (DA) was based on soil physical and chemical properties and was used to differentiate soils developed from I- and S-type granites across contrasting climatic conditions in northeast Brazil. The DA identified the highest values of organic carbon, clay and plant nutrients as key variables to recognize soil profiles derived from I-type granites. In contrast, the greater sand contents and Al saturation distinguished soils... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ciências Agrárias/Agronomia/Ciência do Solo soil science; Soil genesis; Soil fertility; Chemical index of alteration; Northeastern Brazil. Ciência do Solo. Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39708 Heavy metal concentrations and ecological risk assessment of the suspended sediments of a multi-contaminated Brazilian watershed Agronomy Silva, Yuri Jacques Agra Bezerra da; Cantalice, José Ramon Barros; Singh, Vijay Pal; Nascimento, Clístenes Williams Araújo do; Wilcox, Bradford Paul; Silva, Ygor Jacques Agra Bezerra da. Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn was assessed using pollution indices, ecological risk assessment, statistical multivariate techniques and comparison with sediment quality guidelines. Suspended sediments of the upstream portion of the Ipojuca River are moderately contaminated, especially with Mn and As. On the other hand, sediments of the downstream section are highly contaminated, mainly with Zn, Pb, and As. Furthermore, the mean... Tipo: Info:eu-repo/semantics/article Palavras-chave: River pollution; Soil conservation; Sediment quality; Trace elements.. Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42620 Registros recuperados: 4 Primeira ... 1 ... Última

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