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| Nascimento, Clístenes Williams Araújo do; Marques, Marise Conceição. |
| The remediation of lead-contaminated areas poses a serious challenge to soil chemists because Pb has low solubility in soil. Thus, Pb phytostabilization is considered to be an attractive remediation technique. Castor bean (Ricinus communis) is an oilseed crop known for its tolerance to heavy metals, and our aim was to assess the early detection of Pb toxicity and the effects of Pb on the biomass, photosynthetic pigments, antioxidative enzyme activities, and total soluble proteins of this plant. Specimens were grown in a nutrient solution spiked with Pb concentrations of 25, 50, 100, 150, or 200 µmol L-1. A control without Pb was also grown. The results show that X-ray chlorophyll fluorescence is an efficient technique for the early detection of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tolerance; Oilseed crop; Photosystem II; Fr/FFr ratios.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39392 |
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| 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 |
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| Nascimento, Clístenes Williams Araújo do; Marques, Marise Conceição. |
| The remediation of lead-contaminated areas poses a serious challenge to soil chemists because Pb has low solubility in soil. Thus, Pb phytostabilization is considered to be an attractive remediation technique. Castor bean (Ricinus communis) is an oilseed crop known for its tolerance to heavy metals, and our aim was to assess the early detection of Pb toxicity and the effects of Pb on the biomass, photosynthetic pigments, antioxidative enzyme activities, and total soluble proteins of this plant. Specimens were grown in a nutrient solution spiked with Pb concentrations of 25, 50, 100, 150, or 200 µmol L-1. A control without Pb was also grown. The results show that X-ray chlorophyll fluorescence is an efficient technique for the early detection of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tolerance; Oilseed crop; Photosystem II; Fr/FFr ratios.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39392 |
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| Silva, João Paulo Siqueira da; Nascimento, Clístenes Williams Araújo do; Nascimento, Alexsandra Xavier do; Silva, Yuri Jacques Bezerra da; Biondi, Caroline Miranda. |
| The relationship between soil and health is important for populations that depend on the local environment to meet their nutritional needs. This study aimed to evaluate the concentrations of major and trace elements in the soils, edible parts of crops and urine of farmers in agroecological communities. We collected samples of soil, edible parts of crops and urine of farmers and family members in 23 crop fields in agroecological communities from northeast Brazil. These samples were analyzed to concentrations of Al, As, Ca, Cr, Cu, Fe, Hg, Mg, Zn, and Pb in urine and discriminant analysis and principal component analysis were used to assess the data. Concentrations of potentially toxic elements in soils and crops of agroecosystems were below regulatory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metals; Agroecossystems; Biomonitoring.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42623 |
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| 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 |
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| Silva, João Paulo Siqueira da; Nascimento, Clístenes Williams Araújo do; Nascimento, Alexsandra Xavier do; Silva, Yuri Jacques Bezerra da; Biondi, Caroline Miranda. |
| The relationship between soil and health is important for populations that depend on the local environment to meet their nutritional needs. This study aimed to evaluate the concentrations of major and trace elements in the soils, edible parts of crops and urine of farmers in agroecological communities. We collected samples of soil, edible parts of crops and urine of farmers and family members in 23 crop fields in agroecological communities from northeast Brazil. These samples were analyzed to concentrations of Al, As, Ca, Cr, Cu, Fe, Hg, Mg, Zn, and Pb in urine and discriminant analysis and principal component analysis were used to assess the data. Concentrations of potentially toxic elements in soils and crops of agroecosystems were below regulatory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metals; Agroecossystems; Biomonitoring.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42623 |
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