| Autor: |
TIANGUO LI, GANG WANG, XIAOJUN XU, RUI NIE, VO ANH KHUE, QIANG ZHAN, JING ZHAO |
| Předmět: |
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| Zdroj: |
Oxidation Communications; 2016, Vol. 39 Issue 1-I, p291-304, 14p |
| Abstrakt: |
Electrocatalysis was utilised to promote the removal efficiency of Cu(II) from aqueous solution by iron-carbon internal micro-electrolysis (IME). SEM, EDS and electrochemical measurements were used to investigate the importance of external electric field (EEF) in the reaction system of electrocatalysis promotion internal micro-electrolysis (EPIME). Results showed that copper removal belonged to the first-order kinetic model. Kinetic analysis indicated that electrocatalysis strengthened the removal rate of Cu(II) significantly. The zero-valent iron (ZVI) corrosion tests and SEM, EDS characteristics analysis displayed that EEF promoted the rate of galvanic corrosion of ZVI and increased the quantity of reaction active sites on the surface of activated carbon (AC) cathode in iron-carbon IME system remarkably. The reinforcing effects might due to the larger corrosion current density, high overpotential and potential for chemical reduction obtained in the iron-carbon IME system under the presence of EEF. And then the needed activation energy of Cu(II) reductive deposition was reduced, while the rate of nucleation and Cu(II) reduction of EPIME was promoted. Therefore, EPIME effectively improved the removal efficiency, reaction rate and withstand capacity of Cu(II). These reinforcement mechanisms were verified clearly via cyclic voltammetry (CV) analysis. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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