In this study, the electrochemical oxidation of CT （catechol）, HQ （hydroquinone） and RS （resorcinol） was investigated using cyclic and linear sweep voltammetries at GCE （glassy carbon electrode）. The GCE showe...In this study, the electrochemical oxidation of CT （catechol）, HQ （hydroquinone） and RS （resorcinol） was investigated using cyclic and linear sweep voltammetries at GCE （glassy carbon electrode）. The GCE showed an excellent electro activity and reversibility towards the oxidation of these isomers at different conditions. HQ and CT showed one defined oxidation peak and one defined reduction peak while RS showed one defined oxidation peak. These isomers were determined also in their binary and tertiary mixtures. The calibration curves for CT, HQ and RS were obtained in the ranges of 5 × 10-6 to 1 × 10-3 mol.dm-3, 5 × 10-6 to 5 × 10-4mol.dm-3 and 1 × 10-5 to 1× 10-3 mol.dm-3, respectively. The detection limits were 9 ×10-7, 3 × 10-7, 6 × 10-6 mol.dm3 for CT, HQ and RS, respectively. At the optimal experimental conditions, these isomers were determined in different water samples. Also, the removal of catechol from aqueous solution by adsorption on activated charcoal and alumina was studied. After 24 h, 88.7% and 65.9% of catechol was removed using charcoal and alumina, respectively.展开更多
文摘In this study, the electrochemical oxidation of CT （catechol）, HQ （hydroquinone） and RS （resorcinol） was investigated using cyclic and linear sweep voltammetries at GCE （glassy carbon electrode）. The GCE showed an excellent electro activity and reversibility towards the oxidation of these isomers at different conditions. HQ and CT showed one defined oxidation peak and one defined reduction peak while RS showed one defined oxidation peak. These isomers were determined also in their binary and tertiary mixtures. The calibration curves for CT, HQ and RS were obtained in the ranges of 5 × 10-6 to 1 × 10-3 mol.dm-3, 5 × 10-6 to 5 × 10-4mol.dm-3 and 1 × 10-5 to 1× 10-3 mol.dm-3, respectively. The detection limits were 9 ×10-7, 3 × 10-7, 6 × 10-6 mol.dm3 for CT, HQ and RS, respectively. At the optimal experimental conditions, these isomers were determined in different water samples. Also, the removal of catechol from aqueous solution by adsorption on activated charcoal and alumina was studied. After 24 h, 88.7% and 65.9% of catechol was removed using charcoal and alumina, respectively.
