Influence of the current density on the electrochemical treatment of concentrated 1-butyl-3-methylimidazolium chloride solutions on diamond electrodes |
| |
Authors: | Suzana M L de Oliveira Marcionilio Gisele M Alves Rachel B Góes e Silva Pablo J Lima Marques Poliana D Maia Brenno A D Neto José J Linares |
| |
Institution: | 1.Instituto de Química,Universidade de Brasília,Brasília,Brazil;2.Faculdade UnB Planaltina,Universidade de Brasília,Brasília,Brazil |
| |
Abstract: | This paper focuses on the influence of the current density treatment of a concentrated 1-butyl-3-methylimidazolium chloride (BMImCl) solution on an electrochemical reactor with a boron-doped diamond (BDD) anode. The decrease in the total organic carbon (TOC) and the BMImCl concentration demonstrate the capability of BDD in oxidizing ionic liquids (ILs) and further mineralizing (to CO2 and NO3 ?) more rapidly at higher current densities in spite of the reduced current efficiency of the process. Moreover, the presence of Cl? led to the formation of oxychlorinated anions (mostly ClO3 ? and ClO4 ?) and, in combination with the ammonia generated in the cathode from the nitrate reduction, chloramines, more intensely at higher current density. Finally, the analysis of the intermediates formed revealed no apparent influence of the current density on the BMImCl degradation mechanism. The current density presents therefore a complex influence on the IL treatment process that is discussed throughout this paper. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|