Electrochemical Degradation of Crystal Violet Using Ti/Pt/SnO2 Electrode

Abstract

Today, organic wastes (paints, pigments, etc.) are considered to be a major concern for the pollution of aqueous environments. Therefore, it is essential to find new methods to solve this problem. This research was conducted to study the use of electrochemical processes to remove organic pollutants (e.g., crystal violet (CV)) from aqueous solutions. The galvanostatic electrolysis of CV by the use of Ti/Pt/SnO2 anode, were conducted in an electrochemical cell with 100 mL of solution using Na2SO4 and NaCl as supporting electrolyte, the effect of the important electrochemical parameters: current density (20–60 mA cm−2), CV concentration (10–50 mg L−1), sodium chloride concentration (0.01–0.1 g L−1) and initial pH (2 to 10) on the efficiency of the electrochemical process was evaluated and optimized. The electrochemical treatment process of CV was monitored by the UV-visible spectrometry and the chemical oxygen demand (COD). After only 120 min, in a 0.01mol L−1 NaCl solution with a current density of 50 mA cm−2 and a pH value of 7 containing 10 mg L−1 CV, the CV removal efficiency can reach 100%, the COD removal efficiency is up to 80%. The process can therefore be considered as a suitable process for removing CV from coloured wastewater in the textile industries.

Exploring the use of carbon materials as cathodes in electrochemical advanced oxidation processes for the degradation of antibiotics

“…88 % in both synthetic water and real wastewater effluent, although the kinetics was faster in the latter case. This might be due to the presence of chloride ions in the real wastewater effluent, which would react with the hydroxyl radicals to produce active chlorine that accelerates the oxidation process [54]. The salinity and moderate COD values of the water matrix (Table 1) do not seem to have a significant impact in the performance of the EF reaction.…”

Adsorptive performance of bentonite-chitosan nanocomposite as a dual antibacterial and reusable adsorbent for Reactive Red 195 and crystal violet removal: kinetic and thermodynamic studies

“…Thus, there is an imperative necessity to evolve a new strategy for CV and RR removal. Although there are several techniques such as electrochemical [9,10], coagulation/flocculation [11,12], biological treatment [13,14], and ozonation [15,16] have been reported for CV and RR treatment. However, most of these techniques are either economically unfavorable or technically complicated which hinder them to be applied in practice.…”

Electro‐oxidation of pistachio processing wastewater using Ti/Pt mesh‐type anodes in batch system

“…‘Wastewater’ is defined as the waters that come out as a result of residential areas, industrial establishments and energy production facilities, agricultural and animal practices and contain biological and chemical impurities that are harmful to the environment. Wastewaters cause environmental pollution by polluting streams, groundwater, lakes and seas (El Brychy et al, 2021).…”