Influence

The synthesized cationic surfactant N-(2-(2-mercaptoacetoxy) ethyl)-N,N-dimethyldodecan-1-aminium bromide (QSH) was used to prepare colloidal copper nanoparticles (CuNPs) in water through the chemical reduction method. The obtained copper nanoparticles were characterized by FTIR spectrum and transmission electron microscopy (TEM). The corrosion performance was evaluated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements in addition to the salt spray test. The results obtained from these methods were in good agreement. Results showed that the modified coating provide a good coverage and an additional corrosion protection of the carbon steel

Comparison between fixed and fluidized bed cathodes and effect of supporting electrolyte in electrochemical removal of copper ion from dilute solutions

Comparison between fixed and fluidized bed cathodes was experimentally investigated in a circulated-batch system. The cell was made of a Perspex column of cylindrical shape; the inside diameter and the height were 10 and 70 cm, respectively. The results indicated that the performance of the fixed bed is better than that of fluidized bed considering the rate of removal percent and current efficiency. Experimental study of the role of the supporting electrolyte in electrolytic cells confirmed that, type and concentration of supporting electrolyte have a remarkable effect on the two aforementioned parameters as well as the rate of removal. Using of NaCl showed better results than Na2SO4

Study the kinetics of electrochemical removal of copper from dilute solutions using packed bed electrode

A kinetic investigation of the electrochemical removal of copper ions from solutions of different initial metal concentrations using fixed packed-bed electrode in circulated batch system was made. The electro-deposition of copper was found to be electron transfer controlled and follows first-order kinetics. The rate was found to be dependant on initial copper concentration, applied current density and supporting electrolyte concentration. The change of copper concentration with time could be described by the equation: C=C0e-kt where k=k0e-α(C·D) The value of k0 seemed to be independent of the initial concentration of copper in the treated solution. However, the value of α depends on the initial concentration of copper and equals: – α = 0.0073 for C0 ⩽ 100 mg/l – α = 0.0058 for 100 < C0 ⩽ 200 mg/l – α = 0.0041 for C0 ⩾ 250 mg/

Electrochemical removal of copper ions from dilute solutions using packed bed electrode. Part І

Removal of some hazardous waste like copper from effluent streams has an industrial importance. In this field, this paper is directed towards electrochemical removal of copper ions from sulfate solution using packed bed electrode. The cathode packing is in static mode, consisted of graphite particles, with mean particle size equal to 0.125 cm. The high surface area of this cell is expected to give high current efficiency and removal percent. The effect of current density and liquid flow rate were tested. Experimental results obtained indicate that the efficiencies are in direct proportional with current density while inversely proportional with liquid flow rate. It was observed that, using this cell was effective in reducing copper concentration to less than 4 mg/l with R.E of 96.2% during 30 min electrolysis time