A comparative study of electrocoagulation and coagulation of aqueous suspensions of kaolinite powders

Kılıç, Mehtap Gülsün; Hoşten, Çetin

doi:10.1016/j.jhazmat.2009.11.097

Cited by 46 publications

(12 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results obtained at different electrical conductivity values (Figure 8 and 9) showed that conductivity of solution has a considerable influence on the performance of electrocoagulation process, which is in agreement with results obtained by Gulsun Kılıc and Hosten 35 . As the solution conductivity increased from 1000 µS/cm to 3000 µS/cm, the HA removal efficiency increased from 76.95 to 92.69% for the pH 5.…”

Section: Effect Of Electrical Conductivitysupporting

confidence: 89%

Humic Acid Removal from Aqueous Environments by Electrocoagulation Process Using Iron Electrodes

Bazrafshan

Biglari

Mahvi

2011

Journal of Chemistry

View full text Add to dashboard Cite

At present study the performance of electrocoagulation process using iron electrodes sacrificial anode has been investigated for removal of HA from artificial aqueous solution. The experiments were performed in a bipolar batch reactor with four iron electrode connected in parallel. Several working parameters, such as initial pH (3, 5, 7, and 9), electrical conductivity (50 V) and reaction time were studied in an attempt to achieve the highest removal capacity. Solutions of HA with concentration equal 20 mg L-1were prepared. To follow the progress of the treatment, samples of 10 ml were taken at 15, 30, 45, 60, and 75 min interval. Finally HA concentration was measured by UV absorbance at 254 nm (UV254) and TOC concentration was measured by TOC Analyser. The maximum efficiency of HA removal which was obtained in voltage of 50 V, reaction time of 75 min, initial concentration 20 mg L-1, conductivity 3000 µS/Cm and pH 5, is equal to 92.69%. But for natural water samples at the same optimum condition removal efficiency was low (68.8 %). It can be concluded that the electrocoagulation process has the potential to be utilized for cost-effective removal of HA from aqueous environments.

show abstract

Section: Effect Of Electrical Conductivitysupporting

confidence: 89%

Humic Acid Removal from Aqueous Environments by Electrocoagulation Process Using Iron Electrodes

Bazrafshan

Biglari

Mahvi

2011

Journal of Chemistry

View full text Add to dashboard Cite

show abstract

“…It was also observed during the experiments that long operating times, high voltage values, and bubbling of hydrogen gas at the cathode removed the turbidity and COD from the electrolyte (POME), as previously reported by Kilic et al (2009). Kilic and Hosten (2010) also reported the removal of 90% turbidity while conducting EC of aqueous suspensions of kaolinite powders with a concentration of 0.2 g L −1 using electrical input of 40 V, 20 min operating time, and NaCl.…”

Section: Removal Of Chemical Oxygen Demand and Turbidity Of Palm Oil supporting

confidence: 80%

“…2). Kilic and Hosten (2010) reported that the optimum eff ectiveness of EC can be achieved at pH 9. Chen and Hung (2007) described pH as an important factor in EC and suggested that variation in pH is usually caused by the solubility of metal hydroxides.…”

Section: Resultsmentioning

confidence: 99%

Electrocoagulation of Palm Oil Mill Effluent as Wastewater Treatment and Hydrogen Production Using Electrode Aluminum

et al. 2011

View full text Add to dashboard Cite

Palm oil mill effluent (POME) is highly polluting wastewater generated from the palm oil milling process. Palm oil mill effluent was used as an electrolyte without any additive or pretreatment to perform electrocoagulation (EC) using electricity (direct current) ranging from 2 to 4 volts in the presence of aluminum electrodes with a reactor volume of 20 L. The production of hydrogen gas, removal of chemical oxygen demand (COD), and turbidity as a result of electrocoagulation of POME were determined. The results show that EC can reduce the COD and turbidity of POME by 57 and 62%, respectively, in addition to the 42% hydrogen production. Hydrogen production was also helpful to remove the lighter suspended solids toward the surface. The production of Al(OH)XHO at the aluminum electrode (anode) was responsible for the flocculation-coagulation process of suspended solids followed by sedimentation under gravity. The production of hydrogen gas from POME during EC was also compared with hydrogen gas production by electrolysis of tap water at pH 4 and tap water without pH adjustment under the same conditions. The main advantage of this study is to produce hydrogen gas while treating POME with EC to reduce COD and turbidity effectively.

show abstract

“…In practice, after electrocoagulation, the electrostatic charge of dispersed particles present in the solution are neutralized and thus the EC of the solution is reduced (Kılıç and Hoşten, 2010). Tchamango et al (2010) also mention that by means of electrocoagulation process EC could be decreased due to the consumption of protons by transformation of phosphoric acid into solid metal phosphate.…”

Section: Ph and Electrical Conductivity (Ec) Change In Feedlot Runoffmentioning

confidence: 99%

Remediation of Feedlot Nutrients Runoff by Electrocoagulation Process

Thapa¹,

Rahman²,

Borhan³

2015

American Journal of Environmental Sciences

View full text Add to dashboard Cite

Nutrient runoff from Concentrated Animal Feeding Operations (CAFOs) may cause ground and surface water pollution. Scientists and researchers are continually searching for appropriate technologies to mitigate feedlot nutrient runoff pollution. In this study, suitability of electrocoagulation treatment process was examined under laboratory conditions to mitigate nutrient pollutants from the feedlot runoff. Feedlot runoff was treated with three different type of electrodes such as aluminum (Al-Al), iron (Fe-Fe) and hybrid (Al-Fe) at different electrical voltage potentials (5, 10 and 15 Volts) for a designated time step (up to 30 min). The electrocoagulation cell consisted of two parallel rectangular plate electrodes, immersed in a beaker with 500 mL feedlot runoff and powered by a Direct Current (DC) supply. This study was conducted in batches at room temperature. Results indicated that Electrical Conductivity (EC), Total Phosphorus (TP), Total Nitrogen (TN) and Chemical Oxygen Demand (COD) concentration reduced significantly irrespective of electrode types. Overall, TP concentration reduction was higher (100%) followed by COD (50-75%) and TN (25-60%) concentration. Nutrient removal and specific electrical energy consumption increased with increasing voltage level. Aluminum electrodes were more effective than the other two electrodes for TP reduction at all applied potentials and COD reduction was better at lower applied potential. Hybrid electrodes (Al-Fe) reduced TN better than the other two electrodes.

show abstract

A comparative study of electrocoagulation and coagulation of aqueous suspensions of kaolinite powders

Cited by 46 publications

References 25 publications

Humic Acid Removal from Aqueous Environments by Electrocoagulation Process Using Iron Electrodes

Humic Acid Removal from Aqueous Environments by Electrocoagulation Process Using Iron Electrodes

Electrocoagulation of Palm Oil Mill Effluent as Wastewater Treatment and Hydrogen Production Using Electrode Aluminum

Remediation of Feedlot Nutrients Runoff by Electrocoagulation Process

Contact Info

Product

Resources

About