Abstract:
Three types of electrodes were obtained and characterized in order to use for detection of some electrochemical oxidable organics conventionally considered responsabile in COD parameter evaluation: electrodes based on undoped and Co-doped lead dioxide, electrodeposited from slight acidic solutions on stainless steel support; electrodes based on
copper/copper oxides obtained in situ in alkaline medium by potential cycling between the selected potential values or by
polarization to a fixed potential value. The electrochemical and un-electrochemical characterization of the obtained
electrode materials was studied. Detection experiments and calibration tests provided informations regarding:
amperometric detection type, detection potential value, amperometric oxidability level (AOL), electrode sensitivity,
concentration ranges, stability, reproducibility of signal, detection limits, and lifetime.
Keywords:
wastewaters, COD parameter, electrochemical sensing, copper/copper oxide electrode, amperometric oxidability level, pure and Co-doped lead dioxide electrode
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