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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
24/05/2002 |
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Data da última atualização: |
24/05/2002 |
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Autoria: |
SILVA, A. B. da; BANDEIRA, W. J. |
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Título: |
Distribuição regional de créditos BNB; participação do Piauí. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Teresina: CEPRO, 1977. 19 p. |
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Série: |
(CEPRO. Estudos Econômicos, 8). |
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Idioma: |
Português |
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Palavras-Chave: |
Crédito bancário; Desenvolvimento regional. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00446nam a2200145 a 4500
001 1064005
005 2002-05-24
008 1977 bl uuuu u0uu1 u #d
100 1 $aSILVA, A. B. da
245 $aDistribuição regional de créditos BNB; participação do Piauí.
260 $aTeresina: CEPRO, 1977. 19 p.$c1977
490 $a(CEPRO. Estudos Econômicos, 8).
653 $aCrédito bancário
653 $aDesenvolvimento regional
700 1 $aBANDEIRA, W. J.
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Registro original: |
Embrapa Meio-Norte (CPAMN) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
09/11/2012 |
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Data da última atualização: |
16/07/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
GUIMARÃES, F. P.; AGUIAR, R.; OLIVEIRA, J. A.; SILVA, J. A. A.; KARAM, D. |
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Afiliação: |
DECIO KARAM, CNPMS. |
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Título: |
Potential of macrophyte for removing arsenic from aqueous solution. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Planta Daninha, Viçosa, MG, v. 30, n. 4, p. 683-696, 2012. |
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DOI: |
10.1590/S0100-83582012000400001. |
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Idioma: |
Inglês |
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Conteúdo: |
The potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L-1. The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM-1, respectively, when exposed to 5.0 mg L-1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the treatment. The percentage of As removed from the solution decreased when the plants were exposed to high concentrations of the pollutant. Among the three species studied, only L. gibba could be considered an As hyper-accumulator. The use of this plant species for remediation of aquatic environments was shown to be limited and requires further investigation. MenosThe potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L-1. The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM-1, respectively, when exposed to 5.0 mg L-1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the t... Mostrar Tudo |
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Palavras-Chave: |
Biorremediação; Fitorremediação. |
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Thesagro: |
Planta Aquatica; Poluente. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/69793/1/Potential-macrophyte.pdf
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Marc: |
LEADER 02530naa a2200229 a 4500
001 1939307
005 2018-07-16
008 2012 bl uuuu u00u1 u #d
024 7 $a10.1590/S0100-83582012000400001.$2DOI
100 1 $aGUIMARÃES, F. P.
245 $aPotential of macrophyte for removing arsenic from aqueous solution.$h[electronic resource]
260 $c2012
520 $aThe potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L-1. The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM-1, respectively, when exposed to 5.0 mg L-1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the treatment. The percentage of As removed from the solution decreased when the plants were exposed to high concentrations of the pollutant. Among the three species studied, only L. gibba could be considered an As hyper-accumulator. The use of this plant species for remediation of aquatic environments was shown to be limited and requires further investigation.
650 $aPlanta Aquatica
650 $aPoluente
653 $aBiorremediação
653 $aFitorremediação
700 1 $aAGUIAR, R.
700 1 $aOLIVEIRA, J. A.
700 1 $aSILVA, J. A. A.
700 1 $aKARAM, D.
773 $tPlanta Daninha, Viçosa, MG$gv. 30, n. 4, p. 683-696, 2012.
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Embrapa Milho e Sorgo (CNPMS) |
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