title: Electrochemical Degradation of Rhodamine B over Ti/SnO2-Sb Electrode.
abstract: Electrochemical degradation of rhodamine B (C28H31ClN2O3) over Ti/SnO2-Sb anode was investigated in a rectangular cell. The degradation reaction follows pseudo-first-order kinetics. The degradation efficiency of rhodamine B attained >90.0% after 20 minutes of electrolysis at initial concentrations of 5 to 200 mg/L at a constant current density of 20 mA/cm2 with a 10 mmol/L Na2SO4 supporting electrolyte solution. Rhodamine B (50 mg/L) degradation and total organic carbon (TOC) removal ratio achieved 99.9 and 86.7%, respectively, at the optimal conditions after 30 minutes of electrolysis. The results showed that the energy efficiency of rhodamine B (50 mg/L) degradation at the optimal current densities from 2 to 30 mA/cm2 were 23.2 to 84.6 Wh/L, whereas the electrolysis time for 90% degradation of rhodamine B with Ti/SnO2-Sb anode was 36.6 and 7.3 minutes, respectively. The electrochemical method can be an advisable option for the treatment of dyes such as rhodamine B in wastewater.
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, P R China.
authors.forename: Dusmant
authors.initials: D
authors.lastname: Maharana
authors.forename: Junfeng
authors.initials: J
authors.lastname: Niu
authors.forename: Ding
authors.initials: D
authors.lastname: Gao
authors.forename: Zesheng
authors.initials: Z
authors.lastname: Xu
authors.forename: Jianghong
authors.initials: J
authors.lastname: Shi
mesh_terms: D002244:Carbon / Q000737:chemistry; D004553:Electric Conductivity; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D004785:Environmental Pollutants / Q000737:chemistry* / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D012235:Rhodamines / Q000737:chemistry* / Q000302:isolation & purification; D017971:Tin Compounds / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D012235:Rhodamines; D017971:Tin Compounds; D002244:Carbon; D014025:Titanium; C029773:rhodamine B; C045358:stannic oxide