The electrochemical treatment of COD contained in biologically pretreated coking wastewater treated by a three-dimensional electrode system with modified coke as the particle electrode was investigated. And the electr...The electrochemical treatment of COD contained in biologically pretreated coking wastewater treated by a three-dimensional electrode system with modified coke as the particle electrode was investigated. And the electrochemical perromance of the coke modified with various active components was studied. The results show that the coke modified with Fe（NO3）2 has the lowest energy consumption and higher COD removal rate under the same condition, and the modified coke has better surface characteristics for the purpose of this study. In addition, the kinetic constant was also calculated. The study shows that the three-dimensional electrode system with Fe （NO3）z-modified coke can give a satisfactory solution in biologically pretreated coking wastewater.展开更多
In this work,the electrochemical oxidation of L-cysteine(CySH)was investigated on a composite film modified electrode with Au nanoparticles dispersed in the fluorocarbon polymer(Nafion).The excellent electrocatalytic ...In this work,the electrochemical oxidation of L-cysteine(CySH)was investigated on a composite film modified electrode with Au nanoparticles dispersed in the fluorocarbon polymer(Nafion).The excellent electrocatalytic effect on CySH oxidation was attributed to the role of Au nanoparticles.The voltammetric studies revealed two anodic peaks for the oxidation of CySH in the pH range of 2.0–8.0.The electrode was used to detect cysteine at pH 2.0 and pH 7.0.At pH 2.0,a determination range of 3.0–50.0?mol/L was obtained with the detection sensitivity of 22.7A/(mmol L1),while at pH 7.0,a determination range of 2.0–80.0mol/L was obtained with the detection sensitivity of 4.08A/(mmol L1).The detection limits were estimated to be as low as 1.0?mol/L at both pH 7.0 and pH 2.0.Additionally,at pH 7.0,the interferences of ascorbic acid and uric acid were reduced for the detection of cysteine.These made the Au/Nafion/GC electrode a promising candidate for efficient electrochemical sensors for the detection of CySH.展开更多
文摘The electrochemical treatment of COD contained in biologically pretreated coking wastewater treated by a three-dimensional electrode system with modified coke as the particle electrode was investigated. And the electrochemical perromance of the coke modified with various active components was studied. The results show that the coke modified with Fe（NO3）2 has the lowest energy consumption and higher COD removal rate under the same condition, and the modified coke has better surface characteristics for the purpose of this study. In addition, the kinetic constant was also calculated. The study shows that the three-dimensional electrode system with Fe （NO3）z-modified coke can give a satisfactory solution in biologically pretreated coking wastewater.
基金supported by the National Natural Science Foundation of China(20875008)
文摘In this work,the electrochemical oxidation of L-cysteine(CySH)was investigated on a composite film modified electrode with Au nanoparticles dispersed in the fluorocarbon polymer(Nafion).The excellent electrocatalytic effect on CySH oxidation was attributed to the role of Au nanoparticles.The voltammetric studies revealed two anodic peaks for the oxidation of CySH in the pH range of 2.0–8.0.The electrode was used to detect cysteine at pH 2.0 and pH 7.0.At pH 2.0,a determination range of 3.0–50.0?mol/L was obtained with the detection sensitivity of 22.7A/(mmol L1),while at pH 7.0,a determination range of 2.0–80.0mol/L was obtained with the detection sensitivity of 4.08A/(mmol L1).The detection limits were estimated to be as low as 1.0?mol/L at both pH 7.0 and pH 2.0.Additionally,at pH 7.0,the interferences of ascorbic acid and uric acid were reduced for the detection of cysteine.These made the Au/Nafion/GC electrode a promising candidate for efficient electrochemical sensors for the detection of CySH.
