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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
08/12/2017 |
Data da última atualização: |
23/01/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CÔA, F.; STRAUSS, M.; CLEMENTE, Z.; RODRIGUES NETO, L. L.; LOPES, J. R.; ALENCAR, R. S.; SOUZA FILHO, A. G.; ALVES, O. L.; CASTRO, V. L. S. S. de; BARBIERI, E.; MARTINEZ, D. S. T. |
Afiliação: |
FRANCINE COA, LNNano-CNPEM; MATHIAS STRAUSS, LNNano-CNPEM; ZAIRA CLEMENTE, LNNano-CNPEM; LAIS LUZ RODRIGUES NETO, LNNano-CNPEM; JOSIAS ROGERIO LOPES, LNNano-CNPEM; RAFAEL SILVA ALENCAR, UFC; ANTONIO GOMES SOUZA FILHO, UFC; OSWALDO LUIZ ALVES, IQ-UNICAMP; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; EDSON BARBIERI, Instituto de Pesca - APTA Cananeía; DIEGO STEGANI TEODORO MARTINEZ, LNNano-CNPEM. |
Título: |
Coating carbon nanotubes with humic acid using an eco-friendly mechanochemical method: Application for Cu(II) ions removal from water and aquatic ecotoxicity. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Science of the Total Environment, v. 607-608, p. 1479-1486, 2017. |
DOI: |
http://dx.doi.org/10.1016/j.scitotenv.2017.07.045 |
Idioma: |
Inglês |
Conteúdo: |
In this work, industrial grade multi-walled carbon nanotubes (MWCNT) were coated with humic acid (HA) for the first time by means of a milling process, which can be considered an eco-friendly mechanochemical method to prepare materials and composites. The HA-MWCNT hybrid material was characterized by atomic force micros- copy (AFM), scanning electron microscopies (SEM and STEM), X-ray photoelectron spectroscopy (XPS), termogravimetric analysis (TGA), and Raman spectroscopy. STEM and AFM images demonstrated that the MWCNTs were efficiently coated by the humic acid, thus leading to an increase of 20% in the oxygen content at the nanotube surface as observed by the XPS data. After the milling process, the carbon nanotubes were short- ened as unveiled by SEM images and the values of ID/IG intensity ratio increased due to shortening of the nano- tubes and increasing in the number defects at the graphitic structure of carbon nanotubes walls. The analysis of TGA data showed that the quantity of the organic matter of HA on the nanotube surface was 25%. The HA coating was responsible to favor the dispersion of MWCNTs in ultrapure water (i.e. −42 mV, zeta-potential value) and to improve their capacity for copper removal. HA-MWCNTs hybrid material adsorbed 2.5 times more Cu(II) ions than oxidized MWCNTs with HNO3, thus evidencing that it is a very efficient adsorbent material for removing copper ions from reconstituted water. The HA-MWCNTs hybrid material did not show acute ecotoxicity to the tested aquatic model organisms (Hydra attenuata, Daphnia magna, and Danio rerio embryos) up to the highest concentration evaluated (10 mg L−1). The results allowed concluding that the mechanochemical method is effec- tive to coat carbon nanotubes with humic acid, thus generating a functional hybrid material with low aquatic tox- icity and great potential to be applied in environmental nanotechnologies such as the removal of heavy metal ions from water. MenosIn this work, industrial grade multi-walled carbon nanotubes (MWCNT) were coated with humic acid (HA) for the first time by means of a milling process, which can be considered an eco-friendly mechanochemical method to prepare materials and composites. The HA-MWCNT hybrid material was characterized by atomic force micros- copy (AFM), scanning electron microscopies (SEM and STEM), X-ray photoelectron spectroscopy (XPS), termogravimetric analysis (TGA), and Raman spectroscopy. STEM and AFM images demonstrated that the MWCNTs were efficiently coated by the humic acid, thus leading to an increase of 20% in the oxygen content at the nanotube surface as observed by the XPS data. After the milling process, the carbon nanotubes were short- ened as unveiled by SEM images and the values of ID/IG intensity ratio increased due to shortening of the nano- tubes and increasing in the number defects at the graphitic structure of carbon nanotubes walls. The analysis of TGA data showed that the quantity of the organic matter of HA on the nanotube surface was 25%. The HA coating was responsible to favor the dispersion of MWCNTs in ultrapure water (i.e. −42 mV, zeta-potential value) and to improve their capacity for copper removal. HA-MWCNTs hybrid material adsorbed 2.5 times more Cu(II) ions than oxidized MWCNTs with HNO3, thus evidencing that it is a very efficient adsorbent material for removing copper ions from reconstituted water. The HA-MWCNTs hybrid material did not show acute ecoto... Mostrar Tudo |
Palavras-Chave: |
Ácido húmico; Ball milling; Despoluição da água; Functionalization; Mechanochemistry; Nanoecotoxicology; Nanotubos de carbono. |
Thesagro: |
Toxidez; Tratamento da água. |
Thesaurus Nal: |
Carbon nanotubes; Humic acids; Nanotechnology. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 03222naa a2200397 a 4500 001 2081952 005 2018-01-23 008 2017 bl uuuu u00u1 u #d 024 7 $ahttp://dx.doi.org/10.1016/j.scitotenv.2017.07.045$2DOI 100 1 $aCÔA, F. 245 $aCoating carbon nanotubes with humic acid using an eco-friendly mechanochemical method$bApplication for Cu(II) ions removal from water and aquatic ecotoxicity.$h[electronic resource] 260 $c2017 520 $aIn this work, industrial grade multi-walled carbon nanotubes (MWCNT) were coated with humic acid (HA) for the first time by means of a milling process, which can be considered an eco-friendly mechanochemical method to prepare materials and composites. The HA-MWCNT hybrid material was characterized by atomic force micros- copy (AFM), scanning electron microscopies (SEM and STEM), X-ray photoelectron spectroscopy (XPS), termogravimetric analysis (TGA), and Raman spectroscopy. STEM and AFM images demonstrated that the MWCNTs were efficiently coated by the humic acid, thus leading to an increase of 20% in the oxygen content at the nanotube surface as observed by the XPS data. After the milling process, the carbon nanotubes were short- ened as unveiled by SEM images and the values of ID/IG intensity ratio increased due to shortening of the nano- tubes and increasing in the number defects at the graphitic structure of carbon nanotubes walls. The analysis of TGA data showed that the quantity of the organic matter of HA on the nanotube surface was 25%. The HA coating was responsible to favor the dispersion of MWCNTs in ultrapure water (i.e. −42 mV, zeta-potential value) and to improve their capacity for copper removal. HA-MWCNTs hybrid material adsorbed 2.5 times more Cu(II) ions than oxidized MWCNTs with HNO3, thus evidencing that it is a very efficient adsorbent material for removing copper ions from reconstituted water. The HA-MWCNTs hybrid material did not show acute ecotoxicity to the tested aquatic model organisms (Hydra attenuata, Daphnia magna, and Danio rerio embryos) up to the highest concentration evaluated (10 mg L−1). The results allowed concluding that the mechanochemical method is effec- tive to coat carbon nanotubes with humic acid, thus generating a functional hybrid material with low aquatic tox- icity and great potential to be applied in environmental nanotechnologies such as the removal of heavy metal ions from water. 650 $aCarbon nanotubes 650 $aHumic acids 650 $aNanotechnology 650 $aToxidez 650 $aTratamento da água 653 $aÁcido húmico 653 $aBall milling 653 $aDespoluição da água 653 $aFunctionalization 653 $aMechanochemistry 653 $aNanoecotoxicology 653 $aNanotubos de carbono 700 1 $aSTRAUSS, M. 700 1 $aCLEMENTE, Z. 700 1 $aRODRIGUES NETO, L. L. 700 1 $aLOPES, J. R. 700 1 $aALENCAR, R. S. 700 1 $aSOUZA FILHO, A. G. 700 1 $aALVES, O. L. 700 1 $aCASTRO, V. L. S. S. de 700 1 $aBARBIERI, E. 700 1 $aMARTINEZ, D. S. T. 773 $tScience of the Total Environment$gv. 607-608, p. 1479-1486, 2017.
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Embrapa Meio Ambiente (CNPMA) |
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Biblioteca(s): |
Embrapa Suínos e Aves. |
Data corrente: |
07/11/2019 |
Data da última atualização: |
07/11/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 5 |
Autoria: |
FACCHI, C. S.; VALENTINI, F. D. A.; ANIECEVSKI, E.; LEITE, F.; ROSSATTO, G.; DAL SANTO, A.; ZACCARON, G.; BOSETTI, G. E.; HENKES, K. I.; SILVA, A. S. da; TAVERNARI, F. de C.; PETROLLI, T. G. |
Afiliação: |
CAROLINE S. FACCHI, UDESC/Xanxerê; FERNANDA D. A. VALENTINI, UDESC/Xanxerê; EDEMAR ANIECEVSKI, UDESC/Xanxerê; FELIPE LEITE, UDESC/Xanxerê; GABRIEL ROSSATTO, UDESC/Xanxerê; ALÍCIA DAL SANTO, UDESC/Xanxerê; GUSTAVO ZACCARON, UDESC/Xanxerê; GILNEI ELMAR BOSETTI, UDESC/Xanxerê; KAROLINE I. HENKES, UDESC/Xanxerê; ALEKSANDRO SCHAEFER DA SILVA, UDESC/Chapecó; FERNANDO DE CASTRO TAVERNARI, CNPSA; TIAGO GOULART PETROLLI, UDESC/Chapecó. |
Título: |
Carvacrol e cinnamaldeído microencapsulados melhoram o aproveitamento dos nutrientes e mantem a integridade da mucosa intestinal de frangos de corte. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Avicultura Industrial, Itu, ed. 1292, ano 111, n. 09, p. 14-17, 2019. |
Idioma: |
Português |
Palavras-Chave: |
Mucosa intestinal. |
Thesagro: |
Controle Microbiano; Dieta; Digestibilidade; Extrato Vegetal; Frango de Corte; Óleo Essencial. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/204377/1/final9250.pdf
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Marc: |
LEADER 01011naa a2200325 a 4500 001 2114020 005 2019-11-07 008 2019 bl uuuu u00u1 u #d 100 1 $aFACCHI, C. S. 245 $aCarvacrol e cinnamaldeído microencapsulados melhoram o aproveitamento dos nutrientes e mantem a integridade da mucosa intestinal de frangos de corte.$h[electronic resource] 260 $c2019 650 $aControle Microbiano 650 $aDieta 650 $aDigestibilidade 650 $aExtrato Vegetal 650 $aFrango de Corte 650 $aÓleo Essencial 653 $aMucosa intestinal 700 1 $aVALENTINI, F. D. A. 700 1 $aANIECEVSKI, E. 700 1 $aLEITE, F. 700 1 $aROSSATTO, G. 700 1 $aDAL SANTO, A. 700 1 $aZACCARON, G. 700 1 $aBOSETTI, G. E. 700 1 $aHENKES, K. I. 700 1 $aSILVA, A. S. da 700 1 $aTAVERNARI, F. de C. 700 1 $aPETROLLI, T. G. 773 $tAvicultura Industrial, Itu, ed. 1292, ano 111$gn. 09, p. 14-17, 2019.
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