Acid blue 29 decolorization and mineralization by anodic oxidation with a cold gas spray synthesized Sn–Cu–Sb alloy anode

Abstract

The elevated cost of anodic materials used in the anodic oxidation for water treatment of effluents undermines the real application of these technologies. The study of novel alternative materials more affordable is required. In this work, we report the application of Sn-Cu-Sb alloys as cheap anodic material to decolorize azo dye Acid Blue 29 solutions. These anodes have been synthesized by cold gas spray technologies. Almost complete decolorization and COD abatement were attained after 300 and 600 min of electrochemical treatment, respectively. The influence of several variables such as supporting electrolyte, pH, current density and initial pollutant concentration has been investigated. Furthermore, the release and evolution of by-products was followed by HPLC to better understand the oxidative power of Sn-Cu-Sb electrodes.

Electrochemical Technologies for Detecting and Degrading Benzoquinone Using Diamond Films

“…This behavior is due to a higher concentration of the pollutant as well as the intermediates and sub‐products formed that compete with the . OH available, decreasing the removal efficiency . Therefore, in the inset of Figure , low degradation kinetics is observed with high initial BQ concentrations.…”

“…OH yielding H 2 O 2 (Eq. 7) are two main examples of those side parasitic reactions …”

“…This behavior is due to a higher concentration of the pollutant as well as the intermediates and sub-products formed that compete with the * OH available, decreasing the removal efficiency. [51] Therefore, in the inset of Figure 5, low degradation kinetics is observed with high initial BQ concentrations. For experiments with 50, 100, 150 and 200 mg L À 1 of BQ, k 1 values about of 0.137 min À 1 (R 2 = 0.955), 0.070 min À 1 (R 2 = 0.995), 0.053 min À 1 (R 2 = 0.996) and 0.042 min À 1 (R 2 = 0.991) were attained, respectively.…”

Electrooxidation of cardanol on mixed metal oxide (RuO2-TiO2 and IrO2-RuO2-TiO2) coated titanium anodes: insights into recalcitrant phenolic compounds

“…Currently, many electrode materials have been prepared and used for degrading organic pollutants in water, such as carbon materials [13,15], noble metals [16,17], alloys [18], modified clay [19], metallic nanoparticles [17,20] and mainly metal oxides [12,14,21], with low overpotential for both oxygen and hydrogen evolution.…”

Microstructural Characteristics in Babbitt Coatings Deposited by LPCS

“…To date, only a very few studies have paid attention to Sn-Sb-Cu-based Babbitt coatings deposited by means of LPCS and reported the microstructural properties. For instance, Vale-Júnior et al [14] investigated the feasibility of manufacturing an Sn-Sb-Cu-based anode material processed by LPCS and evaluated its potential application for electrochemical treatments. A patent by Lamberton et al [15] disclosed a cold spray coating process for depositing a powdered Babbitt material on the inner surfaces of a bearing assembly.…”