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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
14/02/2017 |
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Data da última atualização: |
16/02/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MELO, R. F. de; DIAS, L. E.; ASSIS, I. R. de. |
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Afiliação: |
ROSELI FREIRE DE MELO, CPATSA; LUIZ EDUARDO DIAS, UFV; IGOR RODRIGUES DE ASSIS, UFV. |
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Título: |
Behavior of Eucalyptus urophylla and Eucalyptus citriodora seedlings grown in soil contaminated by arsenate. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, v. 40, p. 1-11, 2016 |
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Série: |
1806-9657 versão On-line |
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DOI: |
10.1590/18069657rbcs20150310 |
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Idioma: |
Português |
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Conteúdo: |
Persistent areas of tailings and deposits from coal and gold mining may present high levels of arsenic (As), mainly in the arsenate form, endangering the environment and human health. The establishment of vegetation cover is a key step to reclaiming these environments. Thus, this study aimed to evaluate the potential of Eucalyptus urophylla and E. citriodora seedlings for use in phytoremediation programs of arsenate-contaminated areas. Soil samples were incubated at increasing rates (0, 50, 100, 200 and 400 mg dm-3) of arsenic (arsenate form, using Na 2HAsO4) for 15 days. The seedlings were produced in a substrate (vermiculite + sawdust) and were transplanted to the pots with soil three months after seed germination. The values of plant height and diameter were taken during transplanting and 30, 60 and 90 days after transplanting. In the last aluation, the total leaf area and biomass of shoots and roots were also determined. The values of available As in soil which caused a 50 % dry matter reduction TS50%), the As translocation index (TI) from the roots to the shoot of the plants, and its bioconcentration factor (BF) were also calculated. Higher levels of arsenate in the soil significantly reduced the dry matter production of roots and shoots and the height of both species, most notably in E. urophylla plants. The highest levels of As were found in the root, with higher values for E. citriodora (ranging from 253.86 to 400 mg dm-3). The TI and BF were also reduced with As doses, but the values found in E. citriodora were significantly higher than in E. urophylla. E. citriodora plants presented a higher capacity to tolerate As and translocate it to the shoot than E. urophylla . Although these species cannot be considered as hyperaccumulators of As, E. citriodora presented the potential to be used in phytoremediation programs in arsenate-contaminated areas due to the long-term growth period of this species. MenosPersistent areas of tailings and deposits from coal and gold mining may present high levels of arsenic (As), mainly in the arsenate form, endangering the environment and human health. The establishment of vegetation cover is a key step to reclaiming these environments. Thus, this study aimed to evaluate the potential of Eucalyptus urophylla and E. citriodora seedlings for use in phytoremediation programs of arsenate-contaminated areas. Soil samples were incubated at increasing rates (0, 50, 100, 200 and 400 mg dm-3) of arsenic (arsenate form, using Na 2HAsO4) for 15 days. The seedlings were produced in a substrate (vermiculite + sawdust) and were transplanted to the pots with soil three months after seed germination. The values of plant height and diameter were taken during transplanting and 30, 60 and 90 days after transplanting. In the last aluation, the total leaf area and biomass of shoots and roots were also determined. The values of available As in soil which caused a 50 % dry matter reduction TS50%), the As translocation index (TI) from the roots to the shoot of the plants, and its bioconcentration factor (BF) were also calculated. Higher levels of arsenate in the soil significantly reduced the dry matter production of roots and shoots and the height of both species, most notably in E. urophylla plants. The highest levels of As were found in the root, with higher values for E. citriodora (ranging from 253.86 to 400 mg dm-3). The TI and BF were also reduced with As dos... Mostrar Tudo |
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Palavras-Chave: |
Arsênio; Contaminação do solo; Revegetation. |
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Thesagro: |
Brotação; Cobertura Vegetal; Eucalyptus Citriodora; Eucalyptus Urophylla; Germinação; Muda; Raiz; Recuperação do Solo; Semente; Solo. |
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Thesaurus Nal: |
Eucalyptus; Phytoremediation; Phytotoxicity. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/155649/1/RFM0100-0683-rbcs-18069657rbcs20150310.pdf
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Marc: |
LEADER 02978naa a2200361 a 4500
001 2064078
005 2017-02-16
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1590/18069657rbcs20150310$2DOI
100 1 $aMELO, R. F. de
245 $aBehavior of Eucalyptus urophylla and Eucalyptus citriodora seedlings grown in soil contaminated by arsenate.$h[electronic resource]
260 $c2016
490 $a1806-9657 versão On-line
520 $aPersistent areas of tailings and deposits from coal and gold mining may present high levels of arsenic (As), mainly in the arsenate form, endangering the environment and human health. The establishment of vegetation cover is a key step to reclaiming these environments. Thus, this study aimed to evaluate the potential of Eucalyptus urophylla and E. citriodora seedlings for use in phytoremediation programs of arsenate-contaminated areas. Soil samples were incubated at increasing rates (0, 50, 100, 200 and 400 mg dm-3) of arsenic (arsenate form, using Na 2HAsO4) for 15 days. The seedlings were produced in a substrate (vermiculite + sawdust) and were transplanted to the pots with soil three months after seed germination. The values of plant height and diameter were taken during transplanting and 30, 60 and 90 days after transplanting. In the last aluation, the total leaf area and biomass of shoots and roots were also determined. The values of available As in soil which caused a 50 % dry matter reduction TS50%), the As translocation index (TI) from the roots to the shoot of the plants, and its bioconcentration factor (BF) were also calculated. Higher levels of arsenate in the soil significantly reduced the dry matter production of roots and shoots and the height of both species, most notably in E. urophylla plants. The highest levels of As were found in the root, with higher values for E. citriodora (ranging from 253.86 to 400 mg dm-3). The TI and BF were also reduced with As doses, but the values found in E. citriodora were significantly higher than in E. urophylla. E. citriodora plants presented a higher capacity to tolerate As and translocate it to the shoot than E. urophylla . Although these species cannot be considered as hyperaccumulators of As, E. citriodora presented the potential to be used in phytoremediation programs in arsenate-contaminated areas due to the long-term growth period of this species.
650 $aEucalyptus
650 $aPhytoremediation
650 $aPhytotoxicity
650 $aBrotação
650 $aCobertura Vegetal
650 $aEucalyptus Citriodora
650 $aEucalyptus Urophylla
650 $aGerminação
650 $aMuda
650 $aRaiz
650 $aRecuperação do Solo
650 $aSemente
650 $aSolo
653 $aArsênio
653 $aContaminação do solo
653 $aRevegetation
700 1 $aDIAS, L. E.
700 1 $aASSIS, I. R. de
773 $tRevista Brasileira de Ciência do Solo$gv. 40, p. 1-11, 2016
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Embrapa Semiárido (CPATSA) |
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