José Heriberto Oliveira do Nascimento
Federal University of Rio Grande do Norte
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Desalination and Water Treatment | 2016
Késia Karina O. S. Silva; C. A. Paskocimas; Fernando Ribeiro Oliveira; José Heriberto Oliveira do Nascimento; Andrea Zille
Ceramic porous membranes sintered at two different temperature using polyvinyl alcohol and ethylene glycol as binders, and composed of two types of α-alumina with different particle sizes were investigated for the microfiltration of a textile effluent containing indigo dye, auxiliaries, heavy metals, oils, and solids. The physicochemical properties of the membranes and effluent were evaluated. X-ray diffraction, energy dispersive X-ray fluorescence spectroscopy, differential scanning calorimetry, and thermogravimetric analysis confirm that the thin membrane is composed of high crystalline and pure α-alumina. Scanning electron microscopy observation indicates that the membranes have smooth porous surface making it suitable for microfiltration applications. The membrane sintered at 1,450˚C exhibited higher water absorption (WA) and apparent porosity than that sintered at 1,475˚C. The apparent specific gravity and flexural strength are in inverse correlation with the WA due to the enhanced densification of the membranes. The filtered effluent was evaluated using a membrane with an average pore size of 0.4 μm and a total porosity of 29.6%. The average values of rejection were 90% for color, 93% for suspended solids, 95% for turbidity, 60% for metals, and 73% for chemical oxygen demand. These results demonstrate that low-cost ceramic alumina membranes are a very promising advanced treatment for textile industrial effluents.
Environmental Science and Pollution Research | 2017
Izabelle Cristina da Costa Soares; Djalma Ribeiro da Silva; José Heriberto Oliveira do Nascimento; Sergi Garcia-Segura; Carlos A. Martínez-Huitle
Electrochemical water treatment technologies are highly promising to achieve complete decolorization of dyebath effluents, as demonstrated by several studies reported in the literature. However, these works are focused on the treatment of one model pollutant and generalize the performances of the processes which are not transposable since they depend on the pollutant treated. Thus, in the present study, we evaluate, for the first time, the influence of different functional groups that modify the dye structure on the electrochemical process decolorization performance. The textile azo dyes Reactive Orange 16, Reactive Violet 4, Reactive Red 228, and Reactive Black 5 have been selected because they present the same molecular basis structure with different functional groups. The results demonstrate that the functional groups that reduce the nucleophilicity of the pollutant hinder the electrophilic attack of electrogenerated hydroxyl radical. Thereby, the overall decolorization efficiency is consequently reduced as well as the decolorization rate. Moreover, the presence of an additional chromophore azo bond in the molecule enhances the recalcitrant character of the azo dyes as pollutants. The formation of a larger and more stable conjugated π system increases the activation energy required for the electrophyilic attack of •OH, affecting the performance of electrochemical technologies on effluent decolorization.
ICNF 2015 - 2nd International Conference on Natural Fibers | 2015
Fernando Ribeiro Oliveira; Késia K. O. Souto; Tábhita L. T. da Silva; José Heriberto Oliveira do Nascimento; Marcos S. de Aquino; Andrea Zille
This work is supported by Portuguese National Funding, through FCT - Fundacao para a Ciencia e a Tecnologia, on the framework of project UID/CTM/00264/2013.
Materials Today: Proceedings | 2015
José Heriberto Oliveira do Nascimento; Rodrigo F. Luz; Felipe M.F. Galvão; José Daniel D. Melo; Fernando Ribeiro Oliveira; Rasiah Ladchumananandasivam; Andrea Zille
Dyes and Pigments | 2017
José Kaio Max Alves do Rêgo; José Heriberto Oliveira do Nascimento; Pankaj Agrawal; Tomás J. A. Mélo; Maria Carolina B. Costa; Edson Noriyuki Ito
农业科学与技术:B | 2014
Dany G. Kramer; Brismark G. da Rocha; Mirian Claudia de Souza Pereira; Renata S. D. Souza; Carlos Roberto Alves; Geraldo Barroso Cavalcanti Júnior; José Heriberto Oliveira do Nascimento; Margarida J. Quina; Licínio G. Ferreira; Rasiah Ladchumananandasivam; Forest Products (Ciepqpf), Coimbra, Portugal; Portugal. Forest Products (Ciepqpf). Coimbra
Energy Procedia | 2016
Helenice Maria Sacht; L. Bragança; Manuela Guedes de Almeida; José Heriberto Oliveira do Nascimento; Rosana Caram
Materials Today: Proceedings | 2015
Fernando Ribeiro Oliveira; Felipe M.F. Galvão; José Heriberto Oliveira do Nascimento; Késia Karina O. S. Silva; José Ivan Medeiros; Andrea Zille
Procedia Engineering | 2017
Fernando Ribeiro Oliveria; Diego Alves J. De Oliveira; F. Steffens; José Heriberto Oliveira do Nascimento; Késia Karina O. S. Silva; António Pedro Souto
Materials Research-ibero-american Journal of Materials | 2017
F. R. Oliveira; F. Steffens; Poincyana Sonaly Bessa de Holanda; José Heriberto Oliveira do Nascimento; Katia Nicolau Matsui; António Pedro Souto