Electrochemical study of 4-chloro-3-methylphenol on anodically pretreated boron-doped diamond electrode in the absence and presence of a cationic surfactant.

QUOTING:

P. Lochyński, J. Barek, M. Brycht, K. Kuczewski, K. Schwarzova-Peckova, S. Skrzypek, Electrochemical study of 4-chloro-3-methylphenol on anodically pretreated boron-doped diamond electrode in the absence and presence of a cationic surfactant., Journal of Electroanalytical Chemistry 771 (2016) 1-9. doi:10.1016/j.jelechem.2016.03.031
Lochyński P., Barek J., Brycht M., Kuczewski K., Schwarzova-Peckova K., Skrzypek S.,

Abstract

Electrochemical behavior as a basis for voltammetric detection of the priority environmental pollutant 4-chloro-3-methylphenol (PCMC) on a bare boron-doped diamond electrode using DC voltammetry, differential pulse voltammetry, and square-wave voltammetry is presented. PCMC provides a well-defined and highly reproducible oxidation peak in the region from + 1000 mV to + 1200 mV (vs. Ag lAgCl, 3 mol L-1 KCl) in aqueous media in pH range 2.0-10.0. Boron-doped diamond electrodes with metallic type of conductivity (B/C ratio in gaseous phase during deposition procedure 2000 ppm-8000 ppm) and anodic pretreatment of the electrode surface exhibit a better electrochemical response and sensitivity in comparison with cathodic pretreatment and detection using semiconductive electrodes (500 ppm and 1000 ppm B/C ratio). Further, voltammograms are narrowed and visibly amplified in the presence of the cationic surfactant cetyltrimethylammonium bromide (CTAB) at pH values higher than 9.0 due to its electrostatic interaction with the phenolate anion of PCMC (pK(a) = 9.55). Under optimized experimental conditions the developed electroanalytical methods exhibit detection limits in the 10(-7) mol L-1 concentration range in alkaline media (0.01 mol L-1 NaOH) in the presence of CTAB or in acidic media (0.1 mol L-1 phosphate buffer, pH 2.0) in its absence. (C) 2016 Elsevier B.V. All rights reserved.

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The Faculty of Environmental Engineering and Geodesy

Institute of Environmental Engineering

Wrocław University of Environmental and Life Sciences

Address:
pl. Grunwaldzki 24,
50-363 Wrocław

Project assumptions

The overall goal of the project is to develop an innovative multifactor mathematical model enabling monitoring of bath contamination used in the electropolishing process of austenitic stainless steels. This model will allow optimization and reduction of process costs and will have an impact on reducing environmental pollution during electrolytic polishing of austenitic stainless steels.

The final outcome of the project will consist in the development of a method of monitoring the gradual contamination of the electropolishing bath.

Team

The team deals with research in the field of electrochemistry, wastewater treatment, monitoring and optimization of processes in laboratory and industrial conditions. The diverse experience of individual members of the IonsMonit team is its strength.

 


 

Project: “A pioneering model for monitoring pollution of electropolishing process baths (IonsMonit)” financed by the National Center for Research and Development as part of the Lider programme.

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