CT - DEQ - Artigos publicados em periódicos

URI Permanente para esta coleçãohttps://repositorio.ufrn.br/handle/1/180

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Advanced oxidation processes and their application in the petroleum industry: a review
(Brazilian Journal of Petroleum and Gas, 2008) Chiavone Filho, Osvaldo; Mota, André Luis Novais; Albuquerque, Liana Filgueira; Beltrame, Leocádia Terezinha Cordeiro; Machulek Júnior, Amilcar; Nascimento, Cláudio Augusto Oller do
Advanced oxidation processes (AOP) are technologies based on the generation of highly reactive species, the hydroxyl radicals, used in oxidative degradation procedures for organic compounds dissolved or dispersed in aquatic media. These processes are promising alternatives for decontamination of media containing dissolved recalcitrant organic substances, which would not be efficiently removed by conventional methods. The present paper describes a series of AOP, analyzing the aspects related to each type of process, such as the interference of external agents and the ideal operating conditions, based on the analysis and comparison of different studies in the area. In addition, several applied AOP studies on treatment of oil wastewater and on remediation of soil contaminated with oil or its derivatives are presented
Coagulation of indigo blue present in dyeing wastewater using a residual bittern
(Elsevier, 2013-02-05) Chiavone Filho, Osvaldo; Albuquerque, Liana Filgueira; Salgueiro, Alexandra A.; Melo, Josette Lourdes de Sousa
This work presents an experimental study evaluating the reuse of a bittern wastewater (BW) as coagulant for clarification of dyeing effluent. Comparison with other coagulants was also considered. The zeta potential and morphology of the flocs were investigated. Despite the importance of magnesium ion (Mg2+), other ions contained in the BW also contributed to the clarification of the effluent sample. The removals of turbidity and color of the effluent with 200 mg Mg2+/L were higher than 95% and 80%, respectively. The morphology of the flocs in the coagulation with BW was somewhat different in relation to the flocs obtained with just MgCl2. The adsorption mechanism of particle was observed to be different for each coagulant. According to the results obtained in the clarification of the dyeing effluent, the bittern wastewater can be applied efficiently and economically as a coagulant in the physical–chemical treatment of alkaline textile effluent

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