Chemometric study on the electrochemical incineration of nitrilotriacetic acid using platinum and boron-doped diamond anode.
This study investigated the electrochemical incineration of nitrilotriacetic acid (NTA) at boron-doped diamond (BDD) and platinum (Pt) anodes. Trials were performed in the presence of sulfate electrolyte media under recirculation mode. The parameters that influence the degradation efficiency were investigated, including applied current density, flow rate, supporting electrolyte concentration and reaction time. To reduce the number of experiments, the system had been managed under chemometric technique named Doehlert matrix. As a consequence, the mineralization of NTA demonstrated similar behavior upon operating parameters on these two anodes. Further kinetic study indicated that the degradations followed pseudo-first-order reactions for both BDD and Pt anodes, and the reaction rate constant of the former was found to be higher than that of the latter. Such difference could be interpreted by results from fractal analysis. In addition, a reaction sequence for NTA mineralization considering all the detected intermediates was also proposed.
Department of Chemistry, College of Science, Nanjing Agricultural University, Nanjing 210095, China; Suzhou Key Laboratory of Environment and Biosafety, Suzhou Academy of Southeast University, Dushuhu Lake Higher Education Town, Suzhou 215123, China. Electronic address: zhangchy@njau.edu.cn.
Chunyong
C
Zhang
Department of Chemistry, College of Science, Nanjing Agricultural University, Nanjing 210095, China.
Zhenzhu
Z
He
Department of Chemistry, College of Science, Nanjing Agricultural University, Nanjing 210095, China.
Jingyu
J
Wu
Suzhou Key Laboratory of Environment and Biosafety, Suzhou Academy of Southeast University, Dushuhu Lake Higher Education Town, Suzhou 215123, China; State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China.
Degang
D
Fu
D001895:Boron / Q000737:chemistry*; D018130:Diamond; D004553:Electric Conductivity; D017709:Fractals; D006863:Hydrogen-Ion Concentration; D017745:Incineration / Q000379:methods; D007700:Kinetics; D015233:Models, Statistical; D009571:Nitrilotriacetic Acid / Q000032:analysis*; D010100:Oxygen / Q000737:chemistry; D010984:Platinum / Q000737:chemistry*; D012044:Regression Analysis
D010984:Platinum; D018130:Diamond; D009571:Nitrilotriacetic Acid; D001895:Boron; D010100:Oxygen
Boron-doped diamond; Doehlert design; Fractal analysis; Nitrilotriacetic acid; Platinum