Removal of cadmium from simulated wastewater by using stainless steel concentric tubes electrochemical reactor

2017 ◽  
Vol 68 ◽  
pp. 220-225
Author(s):  
Abbas Hamid Sulaymon ◽  
Basma A. Abdulmajeed ◽  
Anas B. Salman
Keyword(s):  
Stainless Steel ◽  
Electrochemical Reactor ◽  
Simulated Wastewater

Electrodeposition of Lead from Simulated Wastewater Using Stainless Steel Tubes Bundle as Cathode

2019 ◽  
Vol 12 (2) ◽  
pp. 143-159
Author(s):  
Anas Bdiwi Salman
Keyword(s):  
Mass Transfer ◽  
Stainless Steel ◽  
Specific Energy Consumption ◽  
Space Velocity ◽  
Electrochemical Reactor ◽  
Lead Ions ◽  
Live Cells ◽  
Steel Tubes ◽  
Simulated Wastewater ◽  
Space Time Yield

Background: Lead ions form a dangerous pollutant to both human and aqua lives when discharged to the environment with wastewater due to the diseases and the damage of the live cells caused by these ions, so, it is very important to find an effective method for lead ions removel. Methodology: Lead ions were successfully recovered from simulated wastewater by a flowthrough batch recycle electrochemical reactor with stainless steel tubes bundle as a cathode operating under mass transfer control conditions in 0.5 M NaCl electrolyte solution. Effects of initial lead ions concentration, electrolyte flow rate, and PH were studied and the mass transfer coefficient was determined under these conditions. Performance of this reactor was analyzed by the construction of some figures of merit like fractional conversion, specific energy consumption, space-time yield, and space velocity. Results: Experimental results were correlated in the general form of a dimensionless mass transfer correlation as SH = 1.024Re0.00699Sc1/3.

Electrogeneration of aluminium to remove silica in water

2012 ◽  
Vol 65 (3) ◽  
pp. 434-439 ◽  
Author(s):  
S. L. Gelover-Santiago ◽  
S. Pérez-Castrejón ◽  
A. Martín-Domínguez ◽  
I. E. Villegas-Mendoza
Keyword(s):  
Stainless Steel ◽  
Direct Current ◽  
Electrochemical Reactor ◽  
Cooling Towers ◽  
Chemical Production ◽  
Electrochemical Systems ◽  
Faraday’S Law ◽  
The One ◽  
Aluminium Anodes ◽  
Polarity Change

This paper presents the results of a study on electrogeneration of aluminium, as a coagulant to remove silica in make-up water for cooling towers. Three electrochemical systems were tested, two with aluminium electrodes (one with polarity change and another without it), and a third one with aluminium anodes and cathodes of stainless steel. From the obtained results it was concluded that under the studied conditions, the most advantageous system to produce aluminium and remove silica is the one with both electrodes of aluminium working with direct current. Due to chemical production of aluminium at the cathode, the concentration of aluminium in the water at the outlet of the electrochemical reactor is much higher than the one calculated according to Faraday's law. Under the tested conditions it was possible to remove up to 66% of silica from water containing around 50 mg L−1.

scholarly journals Electrochemical removal of copper from a simulated wastewater using a rotating tubular packed bed of woven screens electrode

2019 ◽  
Vol 12 (2) ◽  
pp. 127-134
Author(s):  
Jenan Hussein Hemeidan ◽  
Ali H. Abbar
Keyword(s):  
Removal Efficiency ◽  
Process Parameters ◽  
Copper Concentration ◽  
Rotation Speed ◽  
Packed Bed ◽  
Electrochemical Reactor ◽  
Copper Removal ◽  
A Value ◽  
Optimization Of Process Parameters ◽  
Simulated Wastewater

Copper removal from a simulated wastewater was investigated by using rotating tubular packed bed of woven screens electrode as a cathode in a new design of electrochemical reactor. Effects of electrolysis operating parameters like current (0.5–2.5 A), rotation speed (150–750 rpm), and initial copper concentration (100–500ppm) were investigated. Optimization of process parameters was carried out by adopting response surface methodology (RSM) combined with Box–Behnken Design (BBD) where copper removal efficiency was selected as a response function. The results indicated that current has the main effect on the copper removal efficiency followed by rotation speed and concentration. The results of regression analysis revealed that the experimental data could be fitted to a second-order polynomial model with a value of determination coefficient (R2) equal to 0.9894 and Fisher test at value of 51.57 for. The optimum conditions of the process parameters based on RSM method were an initial copper concentration of 205 ppm, current of 2.5A, and rotation speed of 750 rpm utilizing cathode composed of screens with mesh no. 30 where a final copper concentration less than 2 ppm was obtained after 30 min.

Decolourization of Simulated Dye Wastewater Containing Reactive Blue 19 (RB19) by the Electro-Fenton Reaction in the Presence of Metal Oxide-Coated Electrodes

2013 ◽  
Vol 858 ◽  
pp. 40-45
Author(s):  
Moe Thazin Shwe ◽  
Marites M. Dimaculangan ◽  
Mark Daniel G. De Luna
Keyword(s):  
Fenton Reaction ◽  
Advanced Oxidation Process ◽  
Textile Wastewater ◽  
Electrochemical Reactor ◽  
Chemical Oxidation ◽  
Reactive Blue 19 ◽  
Decolorization Efficiency ◽  
Effects Of Ph ◽  
Simulated Wastewater ◽  
Viable Treatment

Reactive Blue (RB 19), also known as Remazol brilliant blue, is a widely-used colorant in various textile applications. RB 19 is very resistant to chemical oxidation due to its aromatic anthraquinone structure highly stabilized by resonance. Its relatively low fixation efficiency (75-80%) attributed to the competition between the formation of the reactive form (vinyl sulfone) and the hydrolysis reaction, results in its prevalence in textile wastewater discharges. In this study, electro-Fenton (EF) process, a popular advanced oxidation process (AOP) was used to treat RB 19 dye-containing simulated wastewater. The electrochemical reactor (0.5 L) used in all experiments had parallel plate/mesh electrodes coated with metal oxides. Synthetic textile wastewater was prepared by dissolving RB 19 dye (300 ppm) in distilled water. The effects of pH, initial [Fe2+], initial [H2O2] and current on RB 19 decolorization efficiency were investigated. Removal of 100 percent RB 19 was achieved at pH 2, 0.71 mM initial [Fe2+], 5 mM initial [H2O2] and 1.86 A in 20 minutes. High decolorization efficiencies and absence of sludge during the treatment process render the electro-Fenton process a viable treatment option for dye wastewaters.

scholarly journals Removal of Manganese Ions (Mn2+) from a Simulated Wastewater by Electrocoagulation/ Electroflotation Technologies with Stainless Steel Mesh Electrodes: Process Optimization Based on Taguchi Approach

2019 ◽  
Vol 20 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Rasha H. Salman
Keyword(s):  
Stainless Steel ◽  
Removal Efficiency ◽  
Signal To Noise Ratio ◽  
Electrolysis Time ◽  
Manganese Ions ◽  
Optimum Conditions ◽  
Relative Significance ◽  
Control Factors ◽  
Simulated Wastewater ◽  
Predicted Values

This study depicts the removal of Manganese ions (Mn2+) from simulated wastewater by combined electrocoagulation/ electroflotation technologies. The effects of initial Mn concentration, current density (C.D.), electrolysis time, and different mesh numbers of stainless steel screen electrodes were investigated in a batch cell by adopting Taguchi experimental design to explore the optimum conditions for maximum removal efficiency of Mn. The results of multiple regression and signal to noise ratio (S/N) showed that the optimum conditions were Mn initial concentration of 100 ppm, C.D. of 4 mA/cm2, time of 120 min, and mesh no. of 30 (wire/inch). Also, the relative significance of each factor was attained by the analysis of variance (ANOVA) which indicates that the percentage of contribution followed the order: time (47.42%), C.D. (37.13%), Mesh number (5.73%), and Mn initial Conc. (0.05%). The electrolysis time and C.D. were the most effective operating parameters and mesh no. had a fair influence on Mn removal efficiency, while the initial conc. of Mn. had no significant effect in the studied ranges of control factors. Regression analysis (R2= 90.16%) showed an acceptable agreement between the experimental and the predicted values, and confirmation test results revealed that the removal efficiency of Mn at optimum conditions was higher than 99%.

Galvanostatic Pb(II) removal from a simulated wastewater by using a stainless-steel wool cathode in a flow-through cell: a factorial-design study

2007 ◽  
Vol 38 (2) ◽  
pp. 167-173 ◽  
Author(s):  
Lucio C. Almeida ◽  
Luiz H. S. Gasparotto ◽  
Nerilso Bocchi ◽  
Romeu C. Rocha-Filho ◽  
Sonia R. Biaggio
Keyword(s):  
Stainless Steel ◽  
Factorial Design ◽  
Steel Wool ◽  
Design Study ◽  
Flow Through ◽  
Simulated Wastewater

scholarly journals Removal of Cadmium from Simulated Wastewater using Rotating Tubular Packed Bed Electrochemical Reactor: Optimization through Response Surface Methodology

2020 ◽  
Vol 13 (2) ◽  
pp. 91-98
Author(s):  
Zahraa N. Abbas ◽  
Ali H. Abbar
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Removal Efficiency ◽  
Process Parameters ◽  
Rotation Speed ◽  
Cadmium Concentration ◽  
Packed Bed ◽  
Electrochemical Reactor ◽  
Cadmium Removal ◽  
Simulated Wastewater

A rotating tubular packed bed electrochemical reactor was used for the electrochemical removal of cadmium (Cd) from simulated wastewater. Impacts of electrolysis operating parameters: current (0.56–2.8 A), rotation speed (100–500 rpm), initial cadmium concentration (20–100 ppm), and pH (3-9) were investigated. Response surface methodology and Box-Behnken design were used for optimizing the process parameters where cadmium Removal Efficiency (RE %) was selected as a response function. Findings of the present work suggested that currently has a main impact on the removal efficiency of cadmium followed by rotation speed, then concentration and pH. The results of the regression analysis showed that experimental data could be fitted to a second-degree polynomial model with value of the determination coefficient (R2) equal to 91.8 %. Optimal conditions for process parameters based on the RSM model were initial Cd concentration of 32.0 ppm, current of 2.8 A, rotation speed of 371 rpm and pH = 3, where a final cadmium concentration less than 0.3 ppm was obtained after 30 min of electrolysis process (RE= 99.28% ).

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