Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Luiz Rogerio Pinho de Andrade Lima"'
Publikováno v:
Holos, Vol 2, Iss 0, Pp 15-25 (2015)
O solo da região da fundição primária de chumbo de Santo Amaro apresenta concentrações anômalas de Pb e Zn e outros elementos potencialmente nocivos como Cu, Cd e As, devido às emissões atmosféricas da usina que operou por 33 anos. Visando
Externí odkaz:
https://doaj.org/article/8197c24a873b4df5a485d55fa6d0fa74
Publikováno v:
Holos, Vol 5, Iss 0, Pp 393-401 (2014)
O minério aurífero da Jacobina Mineração e Comércio foi amostrado e usado para a determinação das funções de seleção S e de quebra B, usando moagem descontinua de nove faixas granulométricas entre 2000 e 75 micra. Foi observado que a taxa
Externí odkaz:
https://doaj.org/article/e5129921449b4fae847825630a0ecc95
Publikováno v:
Holos, Vol 5, Iss 0, Pp 383-392 (2014)
Um teste com um traçador foi utilizado para avaliar as características de um circuito de cianetação envolvendo nove reatores. Amostras foram coletadas na saída do primeiro, segundo, terceiro e nono tanques da cascata. As distribuições de tempo
Externí odkaz:
https://doaj.org/article/075f5fff20d541b9989692e408c964b7
Publikováno v:
REM: International Engineering Journal, Vol 76, Iss 3, Pp 265-272 (2023)
Abstract Heterogeneous catalysts, especially those produced with functionalized clays, can be used for methyl transesterification at moderate temperatures. The use of bentonite clay functionalized by potassium compounds (KF, KOH, K2CO3, KCl and K2SO4
Externí odkaz:
https://doaj.org/article/b05a284418864940ad5ae70b60c5a19d
Autor:
Javan Grisente dos Reis da Costa, Cláudia Lisiane Fanezi da Rocha, Luiz Rogério Pinho de Andrade Lima, Daniel Veras Ribeiro, Carlos Alberto Caldas de Souza
Publikováno v:
Materials Research, Vol 25 (2021)
This paper evaluates the effect of adding glycerol to the electrodeposition bath on the deposition efficiency and characteristics of Ni-Mo coating in concentrations ranging from 0.07 to 0.82 mol.L-1. Evaluation of the corrosion resistance was perform
Externí odkaz:
https://doaj.org/article/ed0a33757eb0437984052c62c1de9c5b
Publikováno v:
Materials Research, Vol 22, Iss 6 (2020)
High density polyethylene and high density polyethylene-clay nanocomposites were produced using direct solvent polymerization and a Ziegler catalyst system (TiCl4 and triethylaluminum in hexane). The produced polymer has a high average molecular weig
Externí odkaz:
https://doaj.org/article/aa72e9097d35459f92533ed58267660b
Autor:
Michele David de Jesus Almeida, Carlos Alberto Della Rovere, Luiz Rogério Pinho de Andrade Lima, Daniel Veras Ribeiro, Carlos Alberto Caldas de Souza
Publikováno v:
Materials Research, Vol 22, Iss 4 (2019)
Zinc electrodeposition is an economical process of Zn coating compared to conventional galvanic process. The galvanizing process is used in various industrial sectors to protect ferrous alloys during the corrosion process. In buildings, the galvanizi
Externí odkaz:
https://doaj.org/article/31a51ce55c004dc5a1443b31371ab1bd
Autor:
Carlos Alberto Caldas de Souza, Claudomiro Bolfarini, Walter José Botta Jr., Luiz Rogério Pinho de Andrade Lima, Marcelo Falcão de Oliveira, Claudio S. Kiminami
Publikováno v:
Materials Research, Vol 16, Iss 6, Pp 1294-1298 (2013)
In the present work the effect of substituting Mo with Nb on the glass forming ability and corrosion resistance of Fe-Co-Cr-M-Si-B-Y (M=Mo, Nb) ribbons with high corrosion resistance is investigated. The X-ray powder diffraction pattern indicates tha
Externí odkaz:
https://doaj.org/article/f5c8b57a7b42450b88386b3f2a8e0045
Autor:
Carlos Alberto Caldas de Souza, Alexandre Teixeira Machado, Luiz Rogério Pinho de Andrade Lima, Roberto Jorge Câmara Cardoso
Publikováno v:
Materials Research, Vol 13, Iss 4, Pp 513-519 (2010)
Electric-arc furnace dust (EAFD) is a by-product of steel production and recycling. This fine-grained material contains high amounts of zinc and iron as well as significant amounts of potentially toxic elements such as lead, cadmium and chromium. The
Externí odkaz:
https://doaj.org/article/0f52120d2e2741e596cff0d81195d329