title: Electrochemical regeneration of phenol-saturated activated carbon - proposal of a reactor.
abstract: An electrochemical process was used to investigate the activated carbon regeneration efficiency (RE) saturated with aromatics. For this purpose, an electrochemical reactor was developed and the operational conditions of this equipment were investigated, which is applied in activated carbon regeneration process. The influence of regeneration parameters such as processing time, the current used, the polarity and the processing fluid (electrolyte) were studied. The performance of electrochemical regeneration was evaluated by adsorption tests, using phenol as adsorbate. The increase in current applied and the process time was found to enhance the RE. Another aspect that indicated a better reactor performance was the type of electrolyte used, showing best results for NaCl. The polarity showed the highest influence on the process, when the cathodic regeneration was more efficient. The electrochemical regeneration process developed in this study presented regeneration capacities greater than 100% when the best process conditions were used, showing that this form of regeneration for activated carbon saturated with aromatics is very promising.
authors.affiliation: a Department of Chemical Engineering , Federal University of Rio Grande do Sul , Porto Alegre , RS , Brazil.
authors.forename: Odivan
authors.initials: O
authors.lastname: Zanella
authors.affiliation: b Analytical Department , Federal Institute of Education, Science and Technology of Rio Grande do Sul , Porto Alegre , RS , Brazil.
authors.forename: Denise
authors.initials: D
authors.lastname: Bilibio
authors.affiliation: b Analytical Department , Federal Institute of Education, Science and Technology of Rio Grande do Sul , Porto Alegre , RS , Brazil.
authors.forename: Wagner Luiz
authors.initials: WL
authors.lastname: Priamo
authors.affiliation: a Department of Chemical Engineering , Federal University of Rio Grande do Sul , Porto Alegre , RS , Brazil.
authors.forename: Isabel Cristina
authors.initials: IC
authors.lastname: Tessaro
authors.affiliation: a Department of Chemical Engineering , Federal University of Rio Grande do Sul , Porto Alegre , RS , Brazil.
authors.forename: Liliana Amaral
authors.initials: LA
authors.lastname: Féris
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000379:methods*; D004563:Electrochemistry; D019800:Phenol / Q000737:chemistry*; D059027:Recycling / Q000379:methods*
chemical_list: D019800:Phenol; D002244:Carbon
keywords: Regeneration; activated carbon; adsorption; electrochemistry; phenol