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Electrochemical Degradation of Rhodamine B over Ti/SnO 2 ‐Sb Electrode
Author(s) -
Maharana Dusmant,
Niu Junfeng,
Gao Ding,
Xu Zesheng,
Shi Jianghong
Publication year - 2015
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143015x14212658613514
Subject(s) - rhodamine b , electrolysis , anode , degradation (telecommunications) , electrochemistry , electrolyte , nuclear chemistry , supporting electrolyte , electrode , rhodamine , chemistry , electrolytic cell , materials science , inorganic chemistry , catalysis , fluorescence , photocatalysis , organic chemistry , telecommunications , physics , quantum mechanics , computer science
Electrochemical degradation of rhodamine B (C 28 H 31 ClN 2 O 3 ) over Ti/SnO 2 ‐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/cm 2 with a 10 mmol/L Na 2 SO 4 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/cm 2 were 23.2 to 84.6 Wh/L, whereas the electrolysis time for 90% degradation of rhodamine B with Ti/SnO 2 ‐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.