TY - GEN
T1 - The kinetics, current efficiency, and power consumption of electrochemical dye decolorization by BD-NCD film electrode
AU - Nurhayati, Ervin
AU - Juang, Yaju
AU - Huang, Chihpin
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/6/15
Y1 - 2017/6/15
N2 - Diamond film electrode has been known as a material with very wide potential window for water electrolysis which leads to its applicability in numerous electrochemical processes. Its capability to produce hydroxyl radicals, a very strong oxidants, prompts its popular application in wastewater treatment. Batch and batch recirculation reactor were applied to perform bulk electrolysis experiments to investigate the kinetics of dye decolorization under different operation conditions, such as pH, active species, and current density. Furthermore, COD degradation data from batch recirculation reactor operation was used as the basis for the calculation of current efficiency and power consumption in the decolorization process. The kinetics of decolorization process using boron-doped nanocrystalline diamond (BD-NCD) film electrode revealed that acidic condition is favored for the dye degradation, and the presence of chloride ion in the solution was found to be more advantageous than sulfate active species, as evidenced by the higher reaction rate constants. Applying different current density of 10, 20 and 30?mA cm-2, it was found that the higher the current density the faster the decolorization rate. General current efficiency achieved after nearly total decolorization and ~80% COD removal in batch recirculation reactor was around 74%, with specific power consumption of 4.4 kWh m-3 (in terms of volume of solution treated) or 145 kWh kg-1(in terms of kg COD treated).
AB - Diamond film electrode has been known as a material with very wide potential window for water electrolysis which leads to its applicability in numerous electrochemical processes. Its capability to produce hydroxyl radicals, a very strong oxidants, prompts its popular application in wastewater treatment. Batch and batch recirculation reactor were applied to perform bulk electrolysis experiments to investigate the kinetics of dye decolorization under different operation conditions, such as pH, active species, and current density. Furthermore, COD degradation data from batch recirculation reactor operation was used as the basis for the calculation of current efficiency and power consumption in the decolorization process. The kinetics of decolorization process using boron-doped nanocrystalline diamond (BD-NCD) film electrode revealed that acidic condition is favored for the dye degradation, and the presence of chloride ion in the solution was found to be more advantageous than sulfate active species, as evidenced by the higher reaction rate constants. Applying different current density of 10, 20 and 30?mA cm-2, it was found that the higher the current density the faster the decolorization rate. General current efficiency achieved after nearly total decolorization and ~80% COD removal in batch recirculation reactor was around 74%, with specific power consumption of 4.4 kWh m-3 (in terms of volume of solution treated) or 145 kWh kg-1(in terms of kg COD treated).
UR - http://www.scopus.com/inward/record.url?scp=85021445534&partnerID=8YFLogxK
U2 - 10.1063/1.4985519
DO - 10.1063/1.4985519
M3 - Conference contribution
AN - SCOPUS:85021445534
T3 - AIP Conference Proceedings
BT - Green Process, Material, and Energy
A2 - Prasetyo, Hari
A2 - Setiawan, Wisnu
A2 - Suryawan, Fajar
A2 - Nugroho, Munajat Tri
A2 - Widayatno, Tri
A2 - Hidayati, Nurul
A2 - Setiawan, Eko
PB - American Institute of Physics Inc.
T2 - 3rd International Conference on Engineering, Technology, and Industrial Application - Green Process, Material, and Energy: A Sustainable Solution for Climate Change, ICETIA 2016
Y2 - 7 December 2016 through 8 December 2016
ER -