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| 121. |  | FERREIRA, E. C.; MILORI, D. M. B. P.; FERREIRA, E. J.; MARTIN NETO, L.; SILVA, W. T. L. da. Seleção de atributos em espectros de LIBS para avaliação da predoção do grau de humificação da matéria orgânica. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 9., 2011. Aracaju, Sergipe. Matéria Orgânica Natural e Substâncias Húmicas: dos avanços das técnicas de caracterização do sequestro de C: anais. Aracaju, Sergipe: Departamento de Quimica da UFS: Grupo Brasileiro do IHSS, 2011. não paginado. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 126. | | SOARES, M. T. S.; CALHEIROS, D. F.; GALVANI, F.; FEIDEN, A.; CAMPOLIN, A. I.; SILVA, W. T. L. da. Parâmetros físico-químicos e eficiência de fossa séptica biodigestora na redução da carga orgânica de esgoto originado de água doce ou salobra, na Borda Oeste do Pantanal. In: SEMINÁRIO INTERNACIONAL DE AGROECOLOGIA DA AMÉRICA DO SUL, 2.; JORNADA INTERNACIONAL DE EDUCAÇÃO DO CAMPO, 1.; SEMINÁRIO DE AGROECOLOGIA DE MATO GROSSO DO SUL, 6; ENCONTRO DE PRODUTORES AGROECOLÓGICOS DE MATO GROSSO DO SUL, 5.; SEMINÁRIO DE SISTEMAS AGROFLORESTAIS EM BASES AGROECOLÓGICAS DE MATO GROSSO DO SUL, 2., 2016, Dourados. Agroecologia e soberania alimentar: saberes em busca do bem viver: anais. Dourados: UFGD, 2016. Não paginado. Agroecol 2016. 1 CD-ROM. Publicado também em: Cadernos de Agroecologia, v. 11, n. 2, 2016.| Biblioteca(s): Embrapa Pantanal. |
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| 127. | | SOARES, G. B.; MALAGUTTI, A. R.; VAZ, C. M. P.; SILVA, W. T. L. da; RIBEIRO, C. Photocatalytic degradation of diuron in aqueous solution by nano-TiO2 films In: INTERNATIONAL CONFERENCE ON FOOD AND AGRICULTURE APPLICATIONS OF NANOTECHNOLOGIES - NanoAgri, 2010, São Pedro, SP. [Anais…] São Pedro: Aptor Software, 2010. Editors: Caue Ribeiro, Odílio Benedito Garrido de Assis, Luiz Henrique Capparelli Mattoso, Sérgio Mascarenhas.| Biblioteca(s): Embrapa Instrumentação. |
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| 128. | | AOUADA, F. A.; MOURA, M. R. de; SILVA, W. T. L. da; MUNIZ, E. C.; MATTOSO, L. H. C. Preparation and Characterization of Hydrophilic, Spectroscopic, and Kinetic Properties of Hydrogels Based on Polyacrylamide and Methylcellulose Polysaccharide. Journal of Applied Polymer Science, New York, v. 120, p. 3004-3013, 2011.| Biblioteca(s): Embrapa Instrumentação. |
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| 130. | | ABREU, P. A. S.; COSTA, B. R. S.; OLDONI, H.; SILVA, W. T. L. da; BASSOI, L. H. Teor foliar de nitrogênio em milho fertirrigado com efluente de esgoto tratado. In: SIMPÓSIO NACIONAL DE INSTRUMENTAÇÃO AGROPECUÁRIA, 4., 2019, São Carlos, SP. Ciência, inovação e mercado: anais. São Carlos, SP: Embrapa Instrumentação, 2019. Editores: Paulino Ribeiro Villas-Boas, Maria Alice Martins, Débora Marcondes Bastos Pereira Milori, Ladislau Martin Neto. SIAGRO 2019. 307-311| Biblioteca(s): Embrapa Instrumentação. |
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| 131. | | GARBIN, J. R.; MILORI, D. M. B. P.; SIMÕES, M. L.; SILVA, W. T. L. DA; MARTIN-NETO, L. Spectroscopical analysis of humic acids influence over the photolysis of aqueous pesticide residues. In: INTERNATIONAL MEETING OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY. -- IHSS, 12, São Pedro, SP, 2004. Humic substances and soil and water environment. Abstracts...[São Carlos], SP: Embrapa Instrumentação Agropecuária, 2004. p. 78.| Biblioteca(s): Embrapa Instrumentação. |
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| 132. | | MELO, W. L. B.; LÓIO, D. A.; FIALHO, L. L.; SILVA, W. T. L. da; MARTIN NETO, L. Uso da espectroscopia fotoacústica no processo de compostagem de poda de árvore associada a materiais da agroindústria. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 8., 2009, Pelotas, RS. Matéria orgânica ambiental e sustentabilidade: anais. Pelotas, RS: Embrapa Clima Temperado, 2009. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 133. | | MELO, W. L. B.; LÓIO, D. A.; FIALHO, L. L.; SILVA, W. T. L. da; MARTIN NETO, L. Uso da espectroscopia fotoacústica no processo de compostagem de poda de árvore associada a materiais da agroindústria. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 8., 2009, Pelotas, RS. Matéria orgânica ambiental e sustentabilidade: livro de resumos. Pelotas, RS: Embrapa Clima Temperado, 2009. p. 93.| Biblioteca(s): Embrapa Instrumentação. |
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| 135. | | FIALHO, L. L.; SIMÕES, M. L.; SILVA, W. T. L. da; MILORI, D. M. B. P.; MARTIN-NETO, L. Utilização da ressonância paramagnética eletrônica (RPE) no monitoramento do processo de compostagem de resíduos orgânicos. In: ENCONTRO NACIONAL DE QUIMICA ANALITICA, 14., 2007, João Pessoa, PB. Resumos... [Rio de Janeiro : ENQA, 2007]. Não paginado. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 138. | | MILORI, D. M. B. P.; VILLAS-BOAS, P. R.; SILVA, W. T. L. da; FERREIRA, E.; SEGNINI, A.; MARTIN-NETO, L. Emerging technique for analyses of soil organic matter. In: WORLD CONGRESS ON INTEGRATED CROP-LIVESTOCK-FOREST SYSTEMS ?WCCLF; INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 3., 2015, Brasília, DF. Proceedings... Brasília, DF: Embrapa; Porto Alegre: UFRGS, 2015. p. 370.| Biblioteca(s): Embrapa Instrumentação. |
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| 140. | | MILORI, D. M. B. P.; SEGNINI, A.; SILVA, W. T. L. da; POSADAS, A.; MARES, V.; QUIROZ, R.; MARTIN NETO, L. Emerging techniques for soil carbon measurements. In: WOLLENBERG, E.; NIHART, A.; TAPIO-BISTROM, M.-L.; GRIEG-GRAN, M. (Ed.). Climate change mitigation and agriculture. London; New York: Earthscan, 2012. p.252-262| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 248 | |
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Registro Completo
|
Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
13/08/2004 |
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Data da última atualização: |
08/03/2010 |
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Autoria: |
GARBIN, J. R.; MILORI, D. M. B. P.; SIMÕES, M. L.; SILVA, W. T. L. DA; MARTIN-NETO, L. |
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Título: |
Spectroscopical analysis of humic acids influence over the photolysis of aqueous pesticide residues. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: INTERNATIONAL MEETING OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY. -- IHSS, 12, São Pedro, SP, 2004. Humic substances and soil and water environment. Abstracts...[São Carlos], SP: Embrapa Instrumentação Agropecuária, 2004. p. 78. |
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Idioma: |
Inglês |
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Conteúdo: |
I. INTRODUCTION
Pesticide residues are nowadays considered the second largest source of drink water contamination and this kind of residue rarely causes fast manifestation of diseases, but it presents a cumulative effect in the organism which can leads to cromossomal damages and carcinogen effects (Dubus et al., 2000, Helmuth et al., 2000). Several alternative methods have been proposed to solve this problem and special attention has been given to the use of UV light to promote the total degradatíon of the residues, because it's a non-selective method that brings the perspective to use sunlight for solving environmental problems (CYTED, 2001). Pesticide photolysis can occur by direct or indirect way (photocatalysis). Titanium dioxide (TiO2), a low cost, stable and non-toxic semiconductor, is the most commonly used photocatalyst which absorbs light around 360 nm, generating hydroxyl radicais (.OH) in the solution, which attack the pesticide molecules starting or accelerating their breakage.
Humic substances (HS) can affect the photolysis and photocatalysis processes once these compounds to show intense absorption bands over UV range and they can quickly react with -OH. However, the entire mechanism of HS influence over pesticides photolysis remain still unknown (Kamiya and Kameyama, 1998 and Westerhoff et al., 1999). So, is necessary a better knowledge of HS effect on the process to use photolysis and photocatalysis by TiO2 for drink water treatment., because HS are naturally presents in lhe aquatic environment.
The purpose of this work was to analyse the influence of different kinds and concentrations of HS over direct photolysis and photocatalysis of pesticides in aqueous solution, under UV-visible radiation (280-480nm). Were used UV-visible absorption and fluorescence emission spectroscopy to measure the pesticides photolysis rate and Electron Paramagnetic Resonance (EPR) spectroscopy measurements to attend the -OH photogeneration by HA during irradiation. MenosI. INTRODUCTION
Pesticide residues are nowadays considered the second largest source of drink water contamination and this kind of residue rarely causes fast manifestation of diseases, but it presents a cumulative effect in the organism which can leads to cromossomal damages and carcinogen effects (Dubus et al., 2000, Helmuth et al., 2000). Several alternative methods have been proposed to solve this problem and special attention has been given to the use of UV light to promote the total degradatíon of the residues, because it's a non-selective method that brings the perspective to use sunlight for solving environmental problems (CYTED, 2001). Pesticide photolysis can occur by direct or indirect way (photocatalysis). Titanium dioxide (TiO2), a low cost, stable and non-toxic semiconductor, is the most commonly used photocatalyst which absorbs light around 360 nm, generating hydroxyl radicais (.OH) in the solution, which attack the pesticide molecules starting or accelerating their breakage.
Humic substances (HS) can affect the photolysis and photocatalysis processes once these compounds to show intense absorption bands over UV range and they can quickly react with -OH. However, the entire mechanism of HS influence over pesticides photolysis remain still unknown (Kamiya and Kameyama, 1998 and Westerhoff et al., 1999). So, is necessary a better knowledge of HS effect on the process to use photolysis and photocatalysis by TiO2 for drink water treatment., because HS are natural... Mostrar Tudo |
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Palavras-Chave: |
hydroxyl radical; Pesticidas; pesticides photolysis. |
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Thesaurus NAL: |
humic acids. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02816naa a2200217 a 4500
001 1028741
005 2010-03-08
008 2004 bl --- 0-- u #d
100 1 $aGARBIN, J. R.
245 $aSpectroscopical analysis of humic acids influence over the photolysis of aqueous pesticide residues.
260 $c2004
520 $aI. INTRODUCTION Pesticide residues are nowadays considered the second largest source of drink water contamination and this kind of residue rarely causes fast manifestation of diseases, but it presents a cumulative effect in the organism which can leads to cromossomal damages and carcinogen effects (Dubus et al., 2000, Helmuth et al., 2000). Several alternative methods have been proposed to solve this problem and special attention has been given to the use of UV light to promote the total degradatíon of the residues, because it's a non-selective method that brings the perspective to use sunlight for solving environmental problems (CYTED, 2001). Pesticide photolysis can occur by direct or indirect way (photocatalysis). Titanium dioxide (TiO2), a low cost, stable and non-toxic semiconductor, is the most commonly used photocatalyst which absorbs light around 360 nm, generating hydroxyl radicais (.OH) in the solution, which attack the pesticide molecules starting or accelerating their breakage. Humic substances (HS) can affect the photolysis and photocatalysis processes once these compounds to show intense absorption bands over UV range and they can quickly react with -OH. However, the entire mechanism of HS influence over pesticides photolysis remain still unknown (Kamiya and Kameyama, 1998 and Westerhoff et al., 1999). So, is necessary a better knowledge of HS effect on the process to use photolysis and photocatalysis by TiO2 for drink water treatment., because HS are naturally presents in lhe aquatic environment. The purpose of this work was to analyse the influence of different kinds and concentrations of HS over direct photolysis and photocatalysis of pesticides in aqueous solution, under UV-visible radiation (280-480nm). Were used UV-visible absorption and fluorescence emission spectroscopy to measure the pesticides photolysis rate and Electron Paramagnetic Resonance (EPR) spectroscopy measurements to attend the -OH photogeneration by HA during irradiation.
650 $ahumic acids
653 $ahydroxyl radical
653 $aPesticidas
653 $apesticides photolysis
700 1 $aMILORI, D. M. B. P.
700 1 $aSIMÕES, M. L.
700 1 $aSILVA, W. T. L. DA
700 1 $aMARTIN-NETO, L.
773 $tIn: INTERNATIONAL MEETING OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY. -- IHSS, 12, São Pedro, SP, 2004. Humic substances and soil and water environment. Abstracts...[São Carlos], SP: Embrapa Instrumentação Agropecuária, 2004. p. 78.
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