Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Ronaldo F, Nascimento"'
Autor:
Daniel B. Alcântara, Paulo Riceli, Ana Debora S. Almeida, Lícia R. Luz, Hélio O. Nascimento, Tatiana S. M. Fernandes, Ana Paula Dionísio, Ana Cecília R. Castro, Ronaldo F. Nascimento, Gisele S. Lopes, Guilherme J. Zocolo
Publikováno v:
Food Analytical Methods. 15:3196-3208
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efe22d5cb061169e53e35e34f56f3486
https://doi.org/10.1007/s12161-022-02355-7
https://doi.org/10.1007/s12161-022-02355-7
Autor:
Ivanildo S. Souza, Felipe R. Santos, Davi A. Martins, Pollyana C. V. Morais, Allyne F. Gama, Ronaldo F. Nascimento, Rivelino M. Cavalcante, Denis M. S. Abessa
Publikováno v:
Environmental Monitoring and Assessment. 194
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f70e31c410069edb20adb630d711a14
https://doi.org/10.1007/s10661-022-10238-x
https://doi.org/10.1007/s10661-022-10238-x
Autor:
Rufino N.A. Azevedo, Kamylla M.M. Bezerra, Ronaldo F. Nascimento, Robert K. Nelson, Christopher M. Reddy, Adriana P. Nascimento, André H.B. Oliveira, Laercio L. Martins, Rivelino M. Cavalcante
Publikováno v:
Environmental pollution (Barking, Essex : 1987). 314
The main objective of this study was to investigate the 2019 and 2022 oil spill events that occurred off the coast of the State of Ceará, Northeastern Brazil. To further assess these mysterious oil spills, we investigated whether the oils stranded o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcb436784900f6ff193c291f8f5afcd9
https://pubmed.ncbi.nlm.nih.gov/36180002
https://pubmed.ncbi.nlm.nih.gov/36180002
Autor:
Vicente O. S. Neto, André G. Oliveira, Raimundo N. P. Teixeira, Marcos A. A. Silva, Paulo C. T. Freire, Denis De Keukeleire, Ronaldo F. Nascimento
Publikováno v:
BioResources, Vol 6, Iss 3, Pp 3376-3395 (2011)
The use of coconut bagasse as an adsorbent for the treatment of Cu(II) ions from aqueous solutions has been investigated. The adsorbent was characterized by infrared spectroscopy, including zeta potential and pH effects. To assess the possibility of
Externí odkaz:
https://doaj.org/article/538a7337c0b243d6ab306df17863116f
Autor:
Sarah A. Moreira, Francisco W. Sousa, André G. Oliveira, Ronaldo F. Nascimento, Edy Sousa de Brito
Publikováno v:
Química Nova, Vol 32, Iss 7, Pp 1717-1722 (2009)
The metal ions removal on cashew bagasse, a low-cost material, has been studied by batch adsorption. The parameters chemical treatment, particle size, biosorbent concentration, and initial pH were studied. In this study the maximum ions removal was o
Externí odkaz:
https://doaj.org/article/08cfd26ab8d84181922654159f06b0b6
Autor:
Maria Aparecida L. Milhome, Denis de Keukeleire, Jefferson P. Ribeiro, Ronaldo F. Nascimento, Tecia Vieira Carvalho, Danilo Caldas Queiroz
Publikováno v:
Química Nova, Vol 32, Iss 8, Pp 2122-2127 (2009)
The present study deals with phenol adsorption on chitin and chitosan and removal of contaminants from wastewater of a petroleum refinery. The adsorption kinetic data were best fitted to first- and second-order models for chitosan and chitin, respect
Externí odkaz:
https://doaj.org/article/b52f5e13591940b4a4a372ba1a21f4c9
Autor:
Rivelino M. Cavalcante, Danielle M. de Lima, Leandro M. Correia, Ronaldo F. Nascimento, Edilberto R. Silveira, George S. S. Freire, Rommel B. Viana
Publikováno v:
Química Nova, Vol 31, Iss 6, Pp 1371-1377 (2008)
Extraction and clean-up are essential points in polycyclic aromatic hydrocarbon (PAHs) analysis in a solid matrix. This work compares extraction techniques and clean-up procedures for PAH analysis. PAH levels, their toxicological significance and sou
Externí odkaz:
https://doaj.org/article/9053a998a7e9476cb8bbdb4e3364e6a7
Publikováno v:
Química Nova, Vol 31, Iss 1, Pp 160-163 (2008)
This article describes the construction and optimization of an inexpensive apparatus for the production of uniform and porous chitosan microspheres. It also describes the control of the main operational parameters and strategies for the production of
Externí odkaz:
https://doaj.org/article/9e9eb856af534baea320de895c875193
Publikováno v:
The Science of the total environment. 838(Pt 4)
Sterols and endocrine-disrupting chemicals were analyzed in two dated sediment cores collected in the Jaguaribe river to determine the recent decades' influence of urbanization and agropastoral activities on the inputs of fecal pollution in a semi-ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30ae8df4da632d5563364e0e7a700b01
https://pubmed.ncbi.nlm.nih.gov/35675885
https://pubmed.ncbi.nlm.nih.gov/35675885
Autor:
Francisco W. Sousa, Sarah A. Moreira, André G. Oliveira, Rivelino M. Cavalcante, Ronaldo F. Nascimento, Morsyleide F. Rosa
Publikováno v:
Química Nova, Vol 30, Iss 5, Pp 1153-1157 (2007)
Green coconut shells were treated with acid, base and hydrogen peroxide solutions for 3, 6, 12 and 24 h for removing toxic metals from synthetic wastewater. The removal of ions by the adsorbent treated with 0.1 mol L-1 NaOH/ 3h was 99.5% for Pb2+ and
Externí odkaz:
https://doaj.org/article/51251be66a834228b8315066a4762c4e