Auto-inhibition effects in anodic oxidation of phenols for electrochemical waste-water purification | Zendy

H. Al-Maznai | Zendy; B. E. Conway | Zendy

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Auto-inhibition effects in anodic oxidation of phenols for electrochemical waste-water purification

Author(s) -

H. Al-Maznai,

B. E. Conway

Publication year - 2001

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0112765a

Subject(s) - chronoamperometry , phenols , passivation , chemistry , electrochemistry , anode , electrode , anodic oxidation , pollutant , inorganic chemistry , impurity , organic chemistry , cyclic voltammetry , layer (electronics)

Removal or modification of noxious organic impurities in waste-waters is a major challenge for environmental science. Pollutants such as phenols and their derivatives, as well as PCBs, have attracted special attention. Inrecent years, the possibilities of effecting direct electrocatalytic oxidations at high-area electrodes such as supported Pt or RuO 2 have been investigated. However, in a number of cases, especially with phenolic impurities, application of anodic oxidation fails to lead to continuous Faradaic oxidation currents owing to the electrode surfaces becoming blocked with polymeric oxidation products leading to auto-inhibition ("passivation") of the desired electrode process. Examples of such effects with phenols and related compounds are examined comparatively in the present paper by means of cyclic volatammetry and chronoamperometry.

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