scholarly journals Effect of various parameters in removing Cr and Ni from model wastewater by using electrocoagulation

2013 ◽  
Vol 15 (4) ◽  
pp. 494-503 ◽  
Keyword(s):  
Removal Rate ◽  
Initial Value ◽  
Effective Surface ◽  
Initial Concentration ◽  
Iron Electrodes ◽  
Electrode Combination ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes ◽  
A Current

<p>The performance of a laboratory scale electrocoagulation system for the removal of Cr and Ni from model wastewater was studied systematically using iron and aluminum electrodes with an effective surface area of 13.8 cm2 and a distance of 4 cm. The influence of several parameters, such as initial concentration, electrode combination, current supply and initial pH was investigated during electrocoagulation process. The increase in initial concentration favored removal rate, did not affect nickel removal, but restricted chromium removal, thus indicating its required mechanism of reducing hexavalent ion to trivalent. The best removal efficiency, when metals existed separately in treated solutions, was accomplished with the use of iron electrodes for Cr (50%) and with aluminum electrodes for Ni (90%). When metals co-existed, iron electrodes achieved the best result, which was 76% for Cr and 82% for Ni, leaving 30 mg l-1 and 17 mg l-1 of residual concentrations, respectively, after 180 min of treatment. Solutions&rsquo; nominal pH appeared to be optimal, since increasing or decreasing their initial value did not benefit the electrocoagulation process. Chromium and nickel simultaneous removal was best achieved for conditions of 100 mg l-1 initial concentration, pH 5 and a current of 0.8 A.</p>

scholarly journals Removal of Cadmium from Industrial Wastewater using Electrocoagulation Process

2019 ◽  
Vol 26 (1) ◽  
pp. 24-34 ◽  
Author(s):  
Mohammed Alameen Salem ◽  
Najwa Majeed
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Applied Voltage ◽  
Industrial Wastewater ◽  
Batch Reactor ◽  
Operating Parameters ◽  
Initial Concentration ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes

Cadmium is one of the heavy metal found in the wastewater of many industries. The electrocoagulation offers many advantages for the removal of cadmium over other methods. So the removal of cadmium from wastewater by using electrocoagulation was studied to investigate the effect of operating parameters on the removal efficiency. The studied parameters were the initial pH, initial concentration, and applied voltage. The study experiments were conducted in a batch reactor with  with two pairs of aluminum electrodes with dimension  and 2mm in thick with 1.5 cm space between them. The optimum removal was obtained at pH =7, initial concentration = 50 mg/L, and applied voltage = 20 V and it was 90%.

scholarly journals Pengaruh Waktu Proses pada Desalinasi Air Laut dengan Metode Elektrokoagulasi secara Batch

FLUIDA ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 65-72
Author(s):  
Rifki Ardiansyah ◽  
Triyoga Meiditama Putra ◽  
Dian Ratna Suminar ◽  
Agustinus Ngatin
Keyword(s):  
Processing Time ◽  
Raw Material ◽  
Process Time ◽  
Iron Electrodes ◽  
Processing Times ◽  
Fe Content ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes ◽  
A Current ◽  
Better Than

ABSTRAK Salah satu upaya untuk menjaga persediaan air yaitu dengan cara menurunkan parameter air laut agar memenuhi parameter air tawar menggunakan metode elektrokoagulasi. Penelitian ini bertujuan untuk mempelajari pengaruh waktu proses elektrokoagulasi terhadap penurunan TDS, kekeruhan, kadar Cl, dan kadar Fe. Selain itu, untuk mengetahui perbandingan antara elektroda Al dan Fe. Air laut diambil dari Pantai Pelabuhan Ratu. Elektroda yang digunakan adalah Al dan Fe dengan ukuran 15x10 cm2. Tegangan yang digunakan yaitu 5 volt atau rapat arus sebesar 0,137 A/dm2 dengan waktu proses 15, 30, 45, dan 60 menit serta volume bahan bakunya 4 Liter. Penelitian dengan waktu proses 30 menit dan proses pengendapan selama satu hari mampu menurunkan kekeruhan hingga 2,28 NTU (55,07%); TDS hingga 1.010 mg/L (3,71%); kadar Cl hingga 271,98 mg/L (3,52%); dan kadar Fe 0,05 mg/L (40,65%). Proses elektrokoagulasi menggunakan elektroda aluminium lebih baik dibandingkan elektroda besi pada waktu proses 30 menit.   ABSTRACT One of the efforts to maintain water supply is by lowering seawater parameters to meet freshwater parameters using the electrocoagulation method. This study aims to study the effect of electrocoagulation process time on the decrease in TDS, turbidity, Cl content, and Fe content. In addition, to determine the comparison between Al and Fe electrodes. Seawater is taken from Pelabuhan Ratu Beach. The electrodes used are Al and Fe with a size of 15x10 cm2. The voltage used is 5 volts or a current density of 0,137 A/dm2 with processing times of 15, 30, 45, and 60 minutes and the volume of the raw material is 4 liters. Research with a processing time of 30 minutes and sedimentation for one day was able to reduce turbidity up to 2,28 NTU (55,07%); TDS up to 1.010 mg/L (3,71%); Cl content up to 271,98 mg/L (3,52%); and Fe content of 0,05 mg/L (40,65%). The electrocoagulation process using aluminum electrodes was better than iron electrodes at a processing time of 30 minutes.

scholarly journals Removal of hexavalent chromium from electroplating wastewater by electrocoagulation with iron electrodes

2013 ◽  
Vol 13 (4) ◽  
pp. 412-418 ◽  
Keyword(s):  
Hexavalent Chromium ◽  
Current Density ◽  
Metal Ion ◽  
Removal Rate ◽  
Ion Concentration ◽  
Wastewater Sample ◽  
Electroplating Wastewater ◽  
Iron Electrodes ◽  
Initial Ph ◽  
Electrocoagulation Process

The performance of electrocoagulation using iron electrodes for the removal of hexavalent chromium from synthetic aqueous solutions and actual industrial electroplating wastewater was studied. Parameters affecting the electrocoagulation process, such as initial pH, applied current density, initial metal ion concentration, COD and time of electroprocessing were investigated. The optimum pH was found to be in the range 4-8. Initial chromium concentrations of 200 – 800 mg L-1 did not influence its removal rate. Higher concentrations were reduced significantly in relatively less time than lower concentrations. Increased current density accelerated the electrocoagulation process, however, on cost of higher energy consumption. Results revealed that best removal was achieved at a current density 40 mA cm-2. The electrocoagulation process was successfully applied to the treatment of an electroplating wastewater sample. Its Cr (VI) ion concentration and COD were effectively reduced under the admissible limits in 50 minutes of electroprocessing.

A COMPARISON BETWEEN ALUMINIUM AND IRON ELECTRODES IN ELECTROCOAGULATION PROCESS FOR GLYPHOSATE REMOVAL

2015 ◽  
Vol 77 (32) ◽  
Author(s):  
Rabiatuladawiyah Danial ◽  
Luqman Chuah Abdullah ◽  
Mohsen Nourouzi Mobarekeh ◽  
Shafreeza Sobri ◽  
Nordayana Mohd Adnan
Keyword(s):  
Charged Particles ◽  
Deionized Water ◽  
Water Production ◽  
Batch Mode ◽  
Initial Concentration ◽  
Iron Electrodes ◽  
Metal Plates ◽  
Aqueous Environments ◽  
Electrocoagulation Process ◽  
Set Up

This study was intended to compare the performance of electrocoagulation process using aluminium and iron electrodes for glyphosate removal in aqueous solution. The effects of initial glyphosate concentration, electrocoagulation time and distance between electrodes, were discussed in detail. An electrocoagulation tank of 500mL with two metal plates electrodes, same in dimensions and metal types, was set up to perform batch mode laboratory experiment and the glyphosate in white powder was first diluted with deionized water. Production of metal cations showed an ability to neutralize negatively charged particles, which then encouraged to bind together to form aggregates of flocs composed of a combination of glyphosate and metal hydroxide. Compared with iron electrodes, aluminium electrodes were more effective for glyphosate removal, with a removal efficiency of over than 80%. This study revealed that electrocoagulation process using aluminium electrodes is reliable, especially designed for initial concentration 100 mg/L, electrocoagulation time 50 min, and distance between electrodes 6 cm. Finally, it can be concluded that electrocoagulation process using aluminium electrodes is efficient for glyphosate removal from aqueous environments.

RESEARCH ON ELECTROCHEMICAL METHODS TO REMOVE FLUORIDE FROM WATER

2017 ◽  
Vol 126 (2B) ◽  
Author(s):  
Võ Anh Khuê
Keyword(s):  
Optimal Condition ◽  
Removal Efficiency ◽  
Water Solution ◽  
Electrochemical Methods ◽  
Fluoride Ion ◽  
Residual Concentration ◽  
Initial Concentration ◽  
Iron Electrodes ◽  
Aluminum Electrodes

<p>The use of electrochemical methods such as micro-electrolysis, electrocoagulation, and micro-electrolysis combined with electrocoagulation to remove fluoride from water were studied in this paper. The results indicated that the micro-electrolysis (using Fe/C particles) and the electrocoagulation (using iron electrodes) are not suitable for removal of fluoride from water solution. The electrocoagulation method with aluminum electrodes for removal efficiency of fluoride is very good. But it is not as good as the micro-electrolysis (using Fe/C particles) combined with the electrocoagulation method (using aluminum electrodes). At the optimal condition of the micro-electrolysis (using Fe/C particles) combined with the electrocoagulation method (using aluminum electrodes) and the initial concentration of fluoride ion of 50 mg/L, the removal efficiency of fluoride ion is 94.03% and the residual concentration is 2.986 mg/L.</p>

Comparative experimental study on the COD removal in aqueous solution of pesticides by the electrocoagulation process using monopolar iron electrodes

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Contact Time ◽  
Iron Concentration ◽  
Cod Removal ◽  
Optimum Conditions ◽  
Cost Of Treatment ◽  
Iron Electrodes ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Important Idea ◽  
The Cost

A comparative study for the COD removal of Chlorpyrifos, Fenitrothion (3%) and Acetamiprid (20%) by electrocoagulation process was performed. The effect of various parameters of electrocoagulation (EC) on removal efficiency was studied and optimized. The COD removal using nonpolar iron electrodes was affected by current density, contact time, initial pH and initial concentration of pesticides. The optimum conditions for the electrocoagulation process were identified as contact time (4, 5 and 10 min), for a maximum abatement of 100 mg/L pesticide solution, respectively. The results provide an important idea for the development electrocoagulation process to remove pesticides significantly along with COD removal using moderate iron concentration, thereby lowering the cost of treatment. Moreover, results show that the pesticide was removal quickly with a maximum rate of 87% for the contact time of 4 min, which revealed that pesticides wastewater can be treated using electrocoagulation.

Removal of Caramel Pigment from Sauce Wastewater by Electrocoagulation Process Using Aluminum Electrodes

2012 ◽  
Vol 260-261 ◽  
pp. 856-861
Author(s):  
Xiao Long Li ◽  
Tao Tao Li ◽  
Feng Qin Zhang
Keyword(s):  
Effective Treatment ◽  
Removal Efficiency ◽  
Electrolysis Time ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes

Electrocoagulation(EC) process is an effective method for the removal caramel from wastewater. In this study, the removal of caramel pigment from sauce wastewater has been studied by EC treatment with aluminum electrodes. The effects of electrolysis time and the initial pH of the sauce wastewater on the removal efficiency of caramel pigment have been investigated. The results indicated that the initial pH of sauce wastewater has a significant effect on the removal efficiency. When the initial pH was kept in the range of 4-8, all aluminum cations produced at the anode formed the insoluble coagulants, leading to a more effective treatment. Flocs formed by the EC process were analyzed by FTIR and the results have been explained.

scholarly journals Personal Care Wastewater Treatment With Electro-coagulation and Electro-oxidation

2019 ◽  
Vol 125 ◽  
pp. 03008
Author(s):  
Rachmad Ardhianto ◽  
Arseto Yekti Bagastyo
Keyword(s):  
Removal Rate ◽  
Cod Removal ◽  
Aluminum Electrode ◽  
Personal Care ◽  
Electrochemical Processes ◽  
Initial Ph ◽  
Electro Oxidation ◽  
Aluminum Electrodes ◽  
Cod Removal Rate ◽  
Electro Coagulation

Personal care wastewater contains pharmaceuticals and personal care products (PPCPs). The compounds were in organic pollutants which have to be treated before water can be discharged. Electrochemical processes such as electro-coagulation and electro-oxidation were used to remove non-biodegradable in wastewater. Electro-coagulation as pretreatment using aluminum electrodes as anode and cathode. Electro-oxidation using Ti/Pt, and Ti/IrO2 as anode electrodes and variation of current 0,6 A, 0,7 A, 0,8 A and 1,0 A. Aluminum electrodes has effectiveness in removing COD, and TSS in electrocoagulation. Using aluminum electrodes remove COD, and TSS 76.1% (5.41 g) and 90.3% (6.10 g). Under initial pH, aluminum electrode does not cause a change in pH from initial pH (4.8-4.9). The removal efficiency of electrooxidation process using aluminum electrocoagulation effluent COD using Ti/Pt and Ti/IrO2 were 34,30% (1,55 g) and 39,71% (1,80 g). Increasing current when using Ti/IrO2 causes the COD removal rate to be more effective than using Ti/Pt. removal COD with 1.0 A gave the optimum COD removal were 34,30% (2,3 Ah/L; 1,55 g) with Ti/Pt, and 39,71% (2,3 Ah/L; 1,80 g) with Ti/IrO2 compared to 0,6 A (1,4 Ah/L), 0,7 A (1,6 Ah/L), and 0.8 A (1,9 Ah/L).

Study on Electrochemical Degradation of Acid Scarlet 3R

2011 ◽  
Vol 71-78 ◽  
pp. 3071-3074
Author(s):  
Jun Sheng Hu ◽  
Yue Li ◽  
Zhuo Wang
Keyword(s):  
Current Density ◽  
Electrolyte Concentration ◽  
Ph Value ◽  
Removal Rate ◽  
Supporting Electrolyte ◽  
Color Removal ◽  
Alkaline Condition ◽  
Dye Wastewater ◽  
Initial Concentration ◽  
Initial Ph

Based on a static experiment, this study researched the electrochemical oxidation process of simulated dye wastewater containing Acid Scarlet 3R in the two-dimensional electrolysing cell. This experiment investigated the effect of such various factors as current density, initial concentration, supporting electrolyte concentration, and the initial pH value on the color removal. The results of the experiment clearly indicated that the rate of color removal increased when the current density was increasing gradually; it decreased when the initial concentration was increasing; it originally increased and then decreased when concentration of electrolytes was increasing; alkaline condition was not conducive to the removal of color, and the effect of decolorization was better under an acid condition than under an alkaline condition. The optimum condition of disposing of dye wastewater is when the current density is 7Am/cm², electrolyte concentration is 0.04mol/L, pH=2.5, under the condition of which the color removal rate could be 96.06%.

scholarly journals Chromium and cadmium removal from synthetic wastewater by Electrocoagulation process

2020 ◽  
Vol 9 (2) ◽  
pp. 375-382
Keyword(s):  
Removal Efficiency ◽  
Current Density ◽  
Initial Temperature ◽  
Complete Removal ◽  
Synthetic Wastewater ◽  
Cadmium Removal ◽  
Solution Ph ◽  
Initial Concentration ◽  
Initial Ph ◽  
Electrocoagulation Process

Electrocoagulation (EC) is one of the efficient electrochemical approaches for industrial wastewater treatment. The present work aims to reach optimum conditions for achieving simultaneous removal of chromium and cadmium ions from synthetic wastewater by EC through assessment of different parameters like electrodes material, electrode configuration, initial pH, current density, initial temperature, and initial contaminate concentration. In addition, a comparison between chemical coagulation and EC efficiency for Chromium and cadmium removal was presented. Results showed that the (Fe-Al), an anode and cathode, achieved better removal efficiency than other electrodes configurations (Fe-Fe / Al-Fe / Al- Al). Also, the increase of initial temperature and current density enhanced the removal efficiency. In contrast, the increase in the initial concentration reduced the removal efficiency. The complete removal of Chromium achieved through the use of Fe-Al electrodes and current density was 12.50 mA/cm2 with solution pH of 5.8, temperature was 25oC and an initial concentration of 280 mg/L. On the other hand, Cadmium’s complete removal was achieved through the use of Fe-Allectrodes, at pH of 5.8, applied current 1.4 A and 60oC. Therefore, EC was proved to be better approach than conventional coagulation in case of treatment of wastewater containing different types of heavy metals ions with high initial concentrations.

Sign in / Sign up

Export Citation Format

Share Document