scholarly journals Electrochemical Degradation of DSW Using Fe- Fe and Al- Al Electrodes Taguchi and Anova Approach

2021 ◽  
Vol 4 (2) ◽  
Keyword(s):  
Electrolysis Time ◽  
Electrochemical Degradation ◽  
Treatment Results ◽  
Colour Removal ◽  
Spent Wash ◽  
Iron Electrodes ◽  
Aluminum Electrodes ◽  
The Impact ◽  
Standard Strategy ◽  
Anova Technique

Expulsion of toxins from distillery spent wash (DSW) was applied by utilizing a blend of matched aluminum and iron electrodes in a clump method of activity utilizing electrochemical procedure. The refinery spent wash was described diagnostically utilizing standard strategy for examination and the treatment results were dissected as far as COD and Colour. The examinations were directed to consider the impact of working boundaries, for example, voltage, separation between the electrodes and electrolysis time and were optimized by utilizing Taguchi and ANOVA technique. pH and stirring speed were kept constant as 7 and 500 rpm. The most extreme expulsion efficiencies of COD and Colour were monitored by considering total of 16 experiments each with three trials. The Taguchi method led to COD of 95% and color removal of 94%, optimized with Al-Al electrodes at the voltage of 25V, distance of electrodes 2 cm and the electrolysis time of 150 minutes. The most extreme COD and Colour removal efficiencies found to be 92% and 89% from Fe-Fe electrodes at the indistinguishable working conditions. In any case, the aluminum electrodes seen progressively appropriate for the deprivation of DSW when contrasted with iron electrodes.

Electrochemical Treatment of Simulated Dye Wastewater

2012 ◽  
Vol 441 ◽  
pp. 555-558
Author(s):  
Feng Tao Chen ◽  
San Chuan Yu ◽  
Xing Qiong Mu ◽  
Shi Shen Zhang
Keyword(s):  
Current Density ◽  
Oxygen Demand ◽  
Electrochemical Treatment ◽  
Dye Wastewater ◽  
Electrolysis Time ◽  
Electrochemical Degradation ◽  
Mild Conditions ◽  
Thermal Decomposition Method ◽  
Initial Ph ◽  
Effects Of Ph

The Ti/SnO2-Sb2O3/PbO2 electrodes were prepared by thermal decomposition method and its application in the electrochemical degradation of a heteropolyaromatic dye, Methylene blue (MB), contained in simulated dye wastewater were investigated under mild conditions. The effects of pH, current density and electrolysis time on de-colorization efficiency were also studied. Chemical oxygen demand (COD) was selected as another parameter to evaluate the efficiency of this degradation method on treatment of MB wastewater. The results revealed that when initial pH was 6.0, current density was 50 mA·cm2, electrolysis time was 60 min, Na2SO4 as electrolyte and its concentration was 3.0 g·dm3, the de-colorization and COD removal efficiency can reach 89.9% and 71.7%, respectively.

Endothelin Receptor Blockade Blunts the Pressor Response to Acute Stress in Obese Men and Women

2021 ◽  
Author(s):  
Cassandra C. Derella ◽  
Anson M. Blanks ◽  
Xiaoling Wang ◽  
Matthew A. Tucker ◽  
Chase Horsager ◽  
...  
Keyword(s):  
Acute Stress ◽  
Pressor Response ◽  
Cold Pressor Test ◽  
Cold Pressor ◽  
Normal Weight ◽  
Endothelin Receptor ◽  
Treatment Results ◽  
Endothelin 1 ◽  
Endothelin System ◽  
The Impact

Obesity is associated with dysregulation of the endothelin system. In obese individuals, an exaggerated pressor response to acute stress is accompanied by increased circulating endothelin-1. The impact of combined endothelin A/B receptor (ETA/B) antagonism on the stress-induced pressor response in overweight/obese individuals is unknown. Objective: To test the hypothesis that treatment with an ETA/B antagonist (bosentan) would reduce the stress-induced pressor response and arterial stiffness in overweight/obese compared to normal weight individuals. Methods: 40 participants [Normal weight (NW): n=20, BMI: 21.7 ± 2.4 kg/m2 & Overweight/obese (OB): n=20, BMI: 33.8 ± 8.2 kg/m2] were randomized to placebo or 125 mg of bosentan twice a day (250 mg total) for 3 days. Hemodynamics were assessed before, during, and after a cold pressor test (CPT). Endothelin-1 was assessed at baseline and immediately after CPT. Following a washout period, the same protocol was repeated with the opposite treatment. Results: The change from baseline in mean arterial pressure (MAP) during CPT following bosentan was significantly lower (p=0.039) in the OB group, compared to the NW group (OB: 28±12 vs LN: 34±15 mm Hg). Conclusions: These results suggest that ETA/B antagonism favorably blunts the pressor response to acute stress in overweight/obese individuals.

The impact of prelaryngeal node metastases on early glottic cancer treatment results

2011 ◽  
Vol 269 (1) ◽  
pp. 193-199 ◽  
Author(s):  
Małgorzata Wierzbicka ◽  
Małgorzata Leszczyńska ◽  
Anna Młodkowska ◽  
Witold Szyfter ◽  
Anna Bartochowska
Keyword(s):  
Cancer Treatment ◽  
Glottic Cancer ◽  
Treatment Results ◽  
Early Glottic Cancer ◽  
Node Metastases ◽  
The Impact

Electrolytic degradation of biorefractory organics and ammonia in leachate from bioreactor landfill

2006 ◽  
Vol 53 (11) ◽  
pp. 143-150 ◽  
Author(s):  
L. Shao ◽  
P. He ◽  
J. Xue ◽  
G. Li
Keyword(s):  
Ammonia Oxidation ◽  
Batch Reactor ◽  
Bioreactor Landfill ◽  
Electrolysis Time ◽  
Electrode Gap ◽  
Initial Concentration ◽  
N Concentration ◽  
Stainless Steel Cathode ◽  
The Impact ◽  
A Current

Electrochemical oxidation was applied to treat the effluent from bioreactor landfill with leachate recirculation, characterised as poor biodegradability and high NH3-N concentration. In this study, the effluent was electrolysed in a batch reactor with Ti/TiO2-IrO2-RuO2 anode and stainless steel cathode. The oxidation of dissolved organic matter (DOM) during electrolysis was evaluated based on the evolution of molecular weight grade, hydrophilic fractionation (humic acid, fulvic acid and hydrophilic fractions), specific ultraviolet absorbance (SUVA254) and AOX. The impact of the initial NH3-N concentration on the oxidation was discussed. The results showed that at a current density of 100 mA/cm2, electrolysis time of 1.5 h and electrode gap of 1 cm, NH3-N with an initial concentration of 1.2 g/L could be completely eliminated and 56% of COD with an initial concentration of 1.2 g/L could be removed, which illustrated that the electrolysis-produced chlorine preferentially oxidised ammonia. The electrolysis mainly resulted in the degradation of humic substances and other high molecular DOM, followed by the increase of BOD/COD ratio and decline of SUVA254 of the leachate. The current efficiencies for COD and ammonia oxidation gradually decreased during the electrolysis, with the latter obviously higher than the former. At the optimal electrolysis time of 1.5 h, NH3-N could be totally removed and the BOD/COD ratio could be enhanced to 0.3, which was also favourable to control the AOX at a reasonable level.

scholarly journals Optimization of Electrochemical Treatment Process Conditions for Distillery Effluent Using Response Surface Methodology

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
P. Arulmathi ◽  
G. Elangovan ◽  
A. Farjana Begum
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Current Density ◽  
Treatment Process ◽  
Electrochemical Treatment ◽  
Process Conditions ◽  
Electrolysis Time ◽  
Process Variables ◽  
Batch Mode ◽  
Spent Wash

Distillery industry is recognized as one of the most polluting industries in India with a large amount of annual effluent production. In this present study, the optimization of electrochemical treatment process variables was reported to treat the color and COD of distillery spent wash using Ti/Pt as an anode in a batch mode. Process variables such as pH, current density, electrolysis time, and electrolyte dose were selected as operation variables and chemical oxygen demand (COD) and color removal efficiency were considered as response variable for optimization using response surface methodology. Indirect electrochemical-oxidation process variables were optimized using Box-Behnken response surface design (BBD). The results showed that electrochemical treatment process effectively removed the COD (89.5%) and color (95.1%) of the distillery industry spent wash under the optimum conditions: pH of 4.12, current density of 25.02 mA/cm2, electrolysis time of 103.27 min, and electrolyte (NaCl) concentration of 1.67 g/L, respectively.

Comparative Research on Treating Vehicle-Washing Wastewater with Two and Three-Dimensional Electrode Method

2013 ◽  
Vol 777 ◽  
pp. 370-374 ◽  
Author(s):  
He Lan Guan
Keyword(s):  
Comparative Research ◽  
Degradation Rate ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Electrolysis Time ◽  
Electrode Distance ◽  
Electrode Method ◽  
Aluminum Electrodes ◽  
Washing Wastewater ◽  
Better Than

Treatment of two-dimensional and three-dimensional electrode method was researched and compared respectively using aluminum electrodes. The influences of voltage, electrolysis time, pH and electrode distance on the result were also discussed. It was found that the degradation rate of wastewater with three-dimensional electrode method was much better than two-dimensional method. For the treatment of vehicle-washing wastewater, the best of voltage was 20V, the electrolysis time was 30 min, and the electrode distance was 2cm.

scholarly journals Removal of Reactive Dyes by Electro Coagulation Process from Aqueous Solution

2020 ◽  
Vol 26 (2) ◽  
pp. 14-28
Author(s):  
Zahraa A Sadoon ◽  
Mohanad J. M-Ridha
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Room Temperature ◽  
Reactive Dyes ◽  
Nacl Concentration ◽  
The World ◽  
Aluminum Electrodes ◽  
Electro Coagulation ◽  
The Impact ◽  
Dyes Removal

The presence of dyes in wastewater has become a major issue all over the world. The discharge of dyes in the environment is concerned for both toxicological and esthetical reasons. In this study, the removal of dyes from aqueous solution by electrocoagulation using aluminum electrodes as cathode and anode were investigated with the electrocoagulation cell of 1litter. The study included: the impact of various operating parameters on the dyes removal efficiency like pH, NaCl concentration, distance between electrodes, voltage, initial dyes concentration and type of electrodes. The dye (congo red) concentrations were (50, 100, 150, and 200 ppm), stirring speed was 120 rpm at room temperature. pH used was maintained constant. The impact of voltage values was chosen as 6, 10, and 14 Volts. On increasing voltage dyes, removals increased significantly. The higher removal efficiency of dyes (99.9%) was achieved at (30) minutes for (Al/Al) electrodes at pH 6.5-7 and voltage 14 Volts. The results showed that the best amount of sodium chloride was found to be 600 ppm in dyes, voltage of 14 Volts, and best gap between the electrodes as 0.5 cm.

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