Electrochemical degradation of drug residues from water

The aim of this work was to investigate the performance of the boron doped diamond (BDD) for the degradation and mineralization of acetylsalicylic acid (ASA), chosen as a model of the pharmaceuticals pollutants from wastewater effluents proceeded from the pharmaceutical industry

Electrochemical behavior and determination of arsenic (III) from water using ag-doped-zeolitecarbon nanotubes composite electrode

The electrochemical behavior of Arsenic (III) from water was investigated using Agdoped-synthetic zeolite-carbon nanotubes composite electrode envisaging its determination in the aqueous solution. The electrocatalytic oxidation of arsenic in acidic medium at Ag-doped -synthetic zeolite-carbon nanotubes composite electrode (Ag-ZCNT) was investigated by cyclic voltammetry, with different practical working pretreatment applications

Electrochemical detection of pentachlorophenol from water at carbon nanofibers-epoxy composite electrodes

In this paper cyclic voltammetry (CV) and linear-sweep voltammetry (LSV) experiments were conducted in order to compare the electroactivity of three types of carbon nanofibers based composite electrodes, i.e., natural and synthetic zeolite modified electrodes and a simple carbon nanofibers electrode for pentachlorophenol (PCP) detection. The enhancement factor of electrode sensitivity for the determination of PCP at the tested electrodes was determined by applying a chemical preconcentration step prior to voltammetric quantification. Synthetic-zeolite modified electrode exhibited a larger electroactivity than the other two electrodes, due to a better ability of synthetic zeolite particles from the electrode surface to retain PCP molecules, without inactivation of electroactive sites

Capecitabine removal from water using commercial granular activated carbon

The aim of this study consisted of removal of capecitabine (CCB), a cytostatic that is often used in cancer therapy and its presence in water exhibited negative impact and risk on the human health. Granular activated carbon (GAC) was tested as sorbent in batch system for CCB removal from water, considering its common usage in water/wastewater treatment technology. Influence of operation variables, e.g, pH, GAC dose and CCB initial concentrations, was studied to optimize GAC-based sorption for CCB removal

Removal of humic acid from water by sorption

In this research, several sorption material types, i.e., zeolite (A), activated carbon (B), the mixture of 50wt.% zeolite and 50wt.% activated carbon (C); 70wt.% zeolite and 30wt.% activated carbon (D); the mixture of 30wt.% zeolite and 70wt.% activated carbon (E) were tested to examine the application for HA removal by sorption process. The structure of natural zeolite and activated carbon was examined by instrumental analysis methods, i.e., X-ray diffraction (XRD) and scanning electron microscopy (SEM/EDX). From the sorption studies, the mixture of 50 wt. % zeolite and 50 wt. % activated carbon was chosen to be the best composition for further studies regarding the advanced composite material for humic acid removal from water

Enhanced electroanalytical performance for diclofenac detection through optimizing voltammetric operating conditions

In this study, the influence of the operating conditions of the voltammetric techniques, i.e., differential-pulsed voltammetry (DPV) and square-wave voltammetry (SWV) on the electroanalytical performance of fullerene-carbon nanofiber paste electrode (Full-CNF) for diclofenac (DCF) determination is studied. The optimization of the step potential (SP) and the modulation amplitude (MA) were achieved for DPV, which were further applied for SWV technique. The influence of frequency was tested and the SP of 25 mV, an MA of 200 mV, at the scan rate of 0.1 V·s-1 and frequency of 5 Hz were found as optimized voltammetric operating conditions related to the sensitivity for the determination of DCF in aqueous solution

Electrochemical detection of paraquat from water using platinum modified BDD electrode

Voltammetric and amperometric detection of paraquat (PQ) herbicide from aqueous solutions has been successfully achieved using a boron-doped diamond (BDD) electrode modified with platinum particles. Electrochemical deposition of platinum was performed by chronoamperometry technique operated at two potential levels, i.e., -0.15 V for 1 s and 0.1 V for 6s. Operational parameters of electrochemical techniques tested in detection application were determined in order to achieve superior electroanalytical performances for quantitative assessment of paraquat concentration at trace level. Both cyclic voltammetry and multiple-pulsed amperometry exhibited best electroanalytical performances in terms of sensitivity and lowest detection limit, in comparison with the other applied voltammetric pulsed techniques

Voltammetric detection of drugs considered as emerging pollutant in water at carbon nanofiber composite electrode

In this study, carbon nanofiber-epoxy (CNF) composite electrode was tested using cyclic voltammetry (CV), differential-pulsed voltammetry (DPV) and square-wave voltammetry (SWV) techniques for the quantitative determination of naproxen (NPX), which was chosen the model for the anti-inflammatory drugs as emerging pollutants from water. The best performance in relation with the sensitivity and the detection potential value was obtained by employing DPV, and in relation with the lowest limit of detection and quantification was achieved by SWV under operating conditions of modulation amplitude of 0.2V, step potential of 0.05V and a scan rate of 0.025V