Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFS |
Texto Completo: | https://ri.ufs.br/handle/riufs/6083 |
Resumo: | This work concerns the fractionation of phosphorus present in sediments from the Macela Reservoir, located in the city of Itabaiana (Sergipe State, Brazil). Two sediment cores were obtained, each to a depth of approximately 30 cm, which were divided into 5 cm sections. The analytical method employed a Standards, Measurements, and Testing (SMT) protocol, in which the phosphorus was split into the fractions: total (PT), inorganic (PI), organic (PO), non-apatite (PNAP), and apatite (PAP). The technique was validated in terms of the limits of detection (DL) and quantification (QL) for each fraction. No significant contamination was observed. The accuracy was in the range 99-101%, and the relative standard deviation (RSD) was better than 2%. The measured phosphorus concentrations were in the ranges 441.60-1335.47 µg g-1 (PT), 409.54-1209.86 µg g-1 (PI), and 21.35-195.87 µg g-1 (PO). For the inorganic forms, the concentrations of PNAP and PAP were in the ranges 106.82-541.09 µg g-1 and 238.56-698.01 µg g-1, respectively. The concentrations of the phosphorus fractions were highest in Core 2. The contents of Fe, Al, Ca, and Corg were 3.45-4.95%, 4.85-7.73%, 1.02-1.89%, and 1.88-8.55%, respectively. Correlation analysis using the Spearman test identified iron and aluminum as the most important controlling factors for P in the sediments studied. The application of principal components analysis (PCA) and hierarchical clustering analysis (HCA) to the measured parameters divided the sediment samples into two groups, according to their similarities. This was also confirmed using analysis of variance (ANOVA, p<0.05). |
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Canuto, Fabiana Alves Bezerrahttp://lattes.cnpq.br/6754065935027092Passos, Elisangela de Andradehttp://lattes.cnpq.br/74154470362799442017-09-27T13:57:34Z2017-09-27T13:57:34Z2013-07-26https://ri.ufs.br/handle/riufs/6083This work concerns the fractionation of phosphorus present in sediments from the Macela Reservoir, located in the city of Itabaiana (Sergipe State, Brazil). Two sediment cores were obtained, each to a depth of approximately 30 cm, which were divided into 5 cm sections. The analytical method employed a Standards, Measurements, and Testing (SMT) protocol, in which the phosphorus was split into the fractions: total (PT), inorganic (PI), organic (PO), non-apatite (PNAP), and apatite (PAP). The technique was validated in terms of the limits of detection (DL) and quantification (QL) for each fraction. No significant contamination was observed. The accuracy was in the range 99-101%, and the relative standard deviation (RSD) was better than 2%. The measured phosphorus concentrations were in the ranges 441.60-1335.47 µg g-1 (PT), 409.54-1209.86 µg g-1 (PI), and 21.35-195.87 µg g-1 (PO). For the inorganic forms, the concentrations of PNAP and PAP were in the ranges 106.82-541.09 µg g-1 and 238.56-698.01 µg g-1, respectively. The concentrations of the phosphorus fractions were highest in Core 2. The contents of Fe, Al, Ca, and Corg were 3.45-4.95%, 4.85-7.73%, 1.02-1.89%, and 1.88-8.55%, respectively. Correlation analysis using the Spearman test identified iron and aluminum as the most important controlling factors for P in the sediments studied. The application of principal components analysis (PCA) and hierarchical clustering analysis (HCA) to the measured parameters divided the sediment samples into two groups, according to their similarities. This was also confirmed using analysis of variance (ANOVA, p<0.05).Neste trabalho foi realizado o fracionamento do fósforo em sedimentos do Reservatório Macela, localizado na cidade de Itabaiana, Sergipe, Brasil. Foram tomados dois testemunhos com profundidade de aproximadamente 30 cm cada, que foram seccionados de 5 cm em 5 cm. O método analítico utilizado foi o Protocolo desenvolvido pelo Standards, Measurements and Testing (SMT), que fracionou o fósforo nos sedimentos em total (PT), inorgânico (PI), orgânico (PO), não apatita (PNAP) e apatita (PAP). A validação da metodologia foi verificada através dos valores de limite de detecção (LD) e de limite de quantificação (LQ) para PT, PI, PO, PNAP e PAP, onde se observou que não houve contaminação significativa. A exatidão do método foi conferida através dos valores de concordância variando 99 a 101% e o desvio padrão relativo (RSD) foi melhor que 2%. A concentração de P variaram entre 441,60 e 1335,47 µg g-1 para PT, entre 409,54 e 1209,86 µg g-1 para PI e entre 21,35 e 195,87 µg g-1 para Po. Para as formas inorgânicas o valor das concentrações de PNAP variou de 106,82 e 541,09 µg g-1 e de PAP variou de 238,56 a 698,01 µg g-1. As concentrações das frações de fósforo nos sedimentos analisados foram maiores no testemunho II. Os conteúdos de Fe, Al, Ca e Corg variaram de 3,45 a 4,95 %, de 4,85 a 7,73 %, de 1,02 a 1,89 % e de 1,88 a 8,55 %. A matriz de correlação de Sperman identificou o ferro e o alumínio como os fatores controladores mais importantes dos P nos sedimentos analisados. A análise de componentes principais (PCA) e analise de agrupamento hierárquico (HCA), aplicada aos parâmetros medidos, dividiu as amostras de sedimentos em dois grupos, de acordo com suas similaridades. Esta tendência foi confirmada pela análise de variância (ANOVA, p< 0,05).application/pdfporQuímica analíticaFósforoSedimentos lacustresAnálise multivariadaReservatórioProtocolo SMTAnalytical chemistryLake sedimentsMultivariate analysisPhosphorusProtocol SMTMultivariate analysisCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAFracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipeinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisPós-Graduação em Químicainfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSORIGINALFABIANA_ALVES_BEZERRA_CANUTO.pdfapplication/pdf1511256https://ri.ufs.br/jspui/bitstream/riufs/6083/1/FABIANA_ALVES_BEZERRA_CANUTO.pdfd2e3c6943f7faebddfec96c225c38144MD51TEXTFABIANA_ALVES_BEZERRA_CANUTO.pdf.txtFABIANA_ALVES_BEZERRA_CANUTO.pdf.txtExtracted texttext/plain199650https://ri.ufs.br/jspui/bitstream/riufs/6083/2/FABIANA_ALVES_BEZERRA_CANUTO.pdf.txtd71878547d9bdc38c004f6e7eb15cdafMD52THUMBNAILFABIANA_ALVES_BEZERRA_CANUTO.pdf.jpgFABIANA_ALVES_BEZERRA_CANUTO.pdf.jpgGenerated Thumbnailimage/jpeg1343https://ri.ufs.br/jspui/bitstream/riufs/6083/3/FABIANA_ALVES_BEZERRA_CANUTO.pdf.jpgef51e8d6fc8db942184e86d5f86f684cMD53riufs/60832018-01-17 20:57:39.784oai:ufs.br:riufs/6083Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2018-01-17T23:57:39Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false |
dc.title.por.fl_str_mv |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe |
title |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe |
spellingShingle |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe Canuto, Fabiana Alves Bezerra Química analítica Fósforo Sedimentos lacustres Análise multivariada Reservatório Protocolo SMT Analytical chemistry Lake sediments Multivariate analysis Phosphorus Protocol SMT Multivariate analysis CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe |
title_full |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe |
title_fullStr |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe |
title_full_unstemmed |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe |
title_sort |
Fracionamento químico de fósforo em testemunho de sedimento do Reservatório Macela, Itabaiana-Sergipe |
author |
Canuto, Fabiana Alves Bezerra |
author_facet |
Canuto, Fabiana Alves Bezerra |
author_role |
author |
dc.contributor.author.fl_str_mv |
Canuto, Fabiana Alves Bezerra |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/6754065935027092 |
dc.contributor.advisor1.fl_str_mv |
Passos, Elisangela de Andrade |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7415447036279944 |
contributor_str_mv |
Passos, Elisangela de Andrade |
dc.subject.por.fl_str_mv |
Química analítica Fósforo Sedimentos lacustres Análise multivariada Reservatório Protocolo SMT |
topic |
Química analítica Fósforo Sedimentos lacustres Análise multivariada Reservatório Protocolo SMT Analytical chemistry Lake sediments Multivariate analysis Phosphorus Protocol SMT Multivariate analysis CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
Analytical chemistry Lake sediments Multivariate analysis Phosphorus Protocol SMT Multivariate analysis |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
This work concerns the fractionation of phosphorus present in sediments from the Macela Reservoir, located in the city of Itabaiana (Sergipe State, Brazil). Two sediment cores were obtained, each to a depth of approximately 30 cm, which were divided into 5 cm sections. The analytical method employed a Standards, Measurements, and Testing (SMT) protocol, in which the phosphorus was split into the fractions: total (PT), inorganic (PI), organic (PO), non-apatite (PNAP), and apatite (PAP). The technique was validated in terms of the limits of detection (DL) and quantification (QL) for each fraction. No significant contamination was observed. The accuracy was in the range 99-101%, and the relative standard deviation (RSD) was better than 2%. The measured phosphorus concentrations were in the ranges 441.60-1335.47 µg g-1 (PT), 409.54-1209.86 µg g-1 (PI), and 21.35-195.87 µg g-1 (PO). For the inorganic forms, the concentrations of PNAP and PAP were in the ranges 106.82-541.09 µg g-1 and 238.56-698.01 µg g-1, respectively. The concentrations of the phosphorus fractions were highest in Core 2. The contents of Fe, Al, Ca, and Corg were 3.45-4.95%, 4.85-7.73%, 1.02-1.89%, and 1.88-8.55%, respectively. Correlation analysis using the Spearman test identified iron and aluminum as the most important controlling factors for P in the sediments studied. The application of principal components analysis (PCA) and hierarchical clustering analysis (HCA) to the measured parameters divided the sediment samples into two groups, according to their similarities. This was also confirmed using analysis of variance (ANOVA, p<0.05). |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-07-26 |
dc.date.accessioned.fl_str_mv |
2017-09-27T13:57:34Z |
dc.date.available.fl_str_mv |
2017-09-27T13:57:34Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
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https://ri.ufs.br/handle/riufs/6083 |
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https://ri.ufs.br/handle/riufs/6083 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Pós-Graduação em Química |
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Universidade Federal de Sergipe (UFS) |
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UFS |
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Repositório Institucional da UFS |
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