Abstract:
This research aimed the elaboration and manufacturing of some carbon
based composite electrode materials with useful properties for the electrochemical
detection of persistent organic pollutants from water. Also, the elaboration and
manufacturing of silver-(doped zeolite)-modified carbon based composite
electrodes suitable for the electrochemical detection of arsenic from water was
aimed. Morphological, electrical and electrochemical characterization of the
electrode materials was investigated. The electrode materials behaviour in
different supporting electrolytes and in the presence of the target analyte, to
establish the relationship between obtained electrode material and reaction type
was assessed. The detection protocols for both the individual electrochemical
determination of pentachlorophenol, arsenic (III) and simultaneous
electrochemical determination of arsenic (III) and lead (II) from water were
elaborated based on the assessment of the detection experiments performance.
Specific informations regarding the voltammetric/amperometric detection type,
detection potential value, concentration ranges, electrode sensitivity, stability,
reproducibility and lifetime, detection limits, calibration were provided. Exploitation
of the specific features of the pulsed voltammetric/amperometric techniques
allowed improving the electroanalytical performance for the detection of the
pollutant from water. The specific compositions of the unmodified/silver-modified
carbon-based composite electrodes were selected to elaborate the detectors
characterized by the real utility potential for pentachlorophenol, arsenic (III) and
lead (II) detection from water.
