scholarly journals Treatment of a Textile Effluent by Electrochemical Oxidation and Coupled System Electooxidation–Salix babylonica

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Alejandra Sánchez-Sánchez ◽  
Moisés Tejocote-Pérez ◽  
Rosa María Fuentes-Rivas ◽  
Ivonne Linares-Hernández ◽  
Verónica Martínez-Miranda ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Electrochemical Oxidation ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Coupled System ◽  
Treated Wastewater ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Effective Reduction ◽  
Salix Babylonica

The removal of pollutants from textile wastewater via electrochemical oxidation and a coupled system electrooxidation—Salix babylonica, using boron-doped diamond electrodes was evaluated. Under optimal conditions of pH 5.23 and 3.5 mA·cm−2 of current density, the electrochemical method yields an effective reduction of chemical oxygen demand by 41.95%, biochemical oxygen demand by 83.33%, color by 60.83%, and turbidity by 26.53% at 300 minutes of treatment. The raw and treated wastewater was characterized by infrared spectroscopy to confirm the degradation of pollutants. The wastewater was oxidized at 15-minute intervals for one hour and was placed in contact with willow plants for 15 days. The coupled system yielded a reduction of the chemical oxygen demand by 14%, color by 85%, and turbidity by 93%. The best efficiency for the coupled system was achieved at 60 minutes, at which time the plants achieved more biomass and photosynthetic pigments.

Amperometric determination of chemical oxygen demand using boron-doped diamond (BDD) sensor

2007 ◽  
Vol 9 (9) ◽  
pp. 2280-2285 ◽  
Author(s):  
Hongbin Yu ◽  
Hua Wang ◽  
Xie Quan ◽  
Shuo Chen ◽  
Yaobin Zhang
Keyword(s):  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Boron Doped Diamond ◽  
Amperometric Determination ◽  
Boron Doped

scholarly journals Electrochemical Properties and Chemical Oxygen Demand Depending on the Thickness of Boron-Doped Diamond

Coatings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1097
Author(s):  
Chang Weon Song ◽  
Mi Young You ◽  
Jae Myung Lee ◽  
Dae-Seung Cho ◽  
Pung Keun Song
Keyword(s):  
Chemical Oxygen Demand ◽  
Electrochemical Properties ◽  
Deposition Time ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Chemical Vapor ◽  
Electrochemical Activation ◽  
Manufacturing Cost ◽  
Boron Doped Diamond ◽  
Boron Doped

In this study, boron-doped diamond (BDD) film was deposited by hot-filament chemical vapor deposition (HFCVD) using acetone as the carbon source and trimethyl borate (TMB) as the boron source with the aim of lowering the manufacturing cost of BDD electrodes. The BDD film was deposited for 12 and 60 h to observe changes in the morphological behavior of the film as well as subsequent changes in the electrochemical properties. The morphology of the BDD film was not affected by the deposition time, but the thickness increased with increasing deposition time. As the deposition time increased, the deposition rate of the BDD film did not increase or decrease; rather, it remained constant at 100 nm/h. As the thickness of the BDD film increased, an increase in the potential window was observed. On the other hand, no distinct change was observed in the electrochemical activation and catalytic activity depending on the thickness, and there were not many differences. Chemical oxygen demand (COD) was measured to determine the practical applicability of the deposited BDD film. Unlike the potential window, the COD removal rate was almost the same and was not affected by the increase in the thickness of the BDD film. Both films under the two deposition conditions showed a high removal rate of 90% on average. This study confirms that BDD electrodes are much more useful for water treatment than the existing electrodes.

scholarly journals Feasibility of Micropollutants Treatment by Coupling Nanofiltration and Electrochemical Oxidation: Case of Hospital Wastewater

2015 ◽  
Vol 13 (2) ◽  
pp. 153-159 ◽  
Author(s):  
Yandi Lan ◽  
Clemence Coetsier ◽  
Christel Causserand ◽  
Karine Groenen Serrano
Keyword(s):  
Electrochemical Oxidation ◽  
Water Reuse ◽  
Membrane Bioreactor ◽  
Specific Energy Consumption ◽  
Oxygen Demand ◽  
Hospital Wastewater ◽  
Total Removal ◽  
Boron Doped Diamond ◽  
Filtration Process ◽  
Boron Doped

Abstract In spite of good performances of the membrane bioreactor (MBR) process, permeate from it can still contain refractory pollutants that have to be removed before water reuse or discharge. The present study is an attempt to combine the advantages of two well-known technologies, which are nanofiltration (NF) and electrochemical oxidation (EO) to treat MBR effluent from hospital wastewater. The concept is based on a preconcentration of micropollutants with a reduction of the wastewater volume by NF and treatment of the NF retentate by oxidation. During filtration process the rejection of ciprofloxacin, as a target molecule, reached beyond 97%. Then the NF retentate was treated by EO using a boron-doped diamond anode (BDD). Galvanostatic electrolyses showed that this anode is efficient to mineralize not only ciprofloxacin but also all the micropollutants and organics contained in MBR effluent. The results demonstrated that rapid mineralization occurred: the removal of total organic carbon and chemical oxygen demand (COD) reached 97% and 100%, respectively, in our conditions in 300 min maximum. The specific energy consumption for the total removal of COD was calculated to be 50 kW h kg˗1 COD.

scholarly journals Determination of Chemical Oxygen Demand (COD) at Boron-doped Diamond (BDD) Sensor by Means of Amperometric Technique

2012 ◽  
Vol 47 ◽  
pp. 1117-1120 ◽  
Author(s):  
R. Bogdanowicz ◽  
J. Czupryniak ◽  
M. Gnyba ◽  
J. Ryl ◽  
T. Ossowski ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Boron Doped Diamond ◽  
Boron Doped

scholarly journals Kinetics of the Organic Compounds and Ammonium Nitrogen Electrochemical Oxidation in Landfill Leachates at Boron-Doped Diamond Anodes

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4971
Author(s):  
Barbara Krystyna Wilk ◽  
Małgorzata Szopińska ◽  
Aneta Luczkiewicz ◽  
Michał Sobaszek ◽  
Ewa Siedlecka ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Cod Removal ◽  
High Concentration ◽  
Landfill Leachates ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Energy Consuming

Electrochemical oxidation (EO) of organic compounds and ammonium in the complex matrix of landfill leachates (LLs) was investigated using three different boron-doped diamond electrodes produced on silicon substrate (BDD/Si)(levels of boron doping [B]/[C] = 500, 10,000, and 15,000 ppm—0.5 k; 10 k, and 15 k, respectively) during 8-h tests. The LLs were collected from an old landfill in the Pomerania region (Northern Poland) and were characterized by a high concentration of N-NH4+ (2069 ± 103 mg·L−1), chemical oxygen demand (COD) (3608 ± 123 mg·L−1), high salinity (2690 ± 70 mg Cl−·L−1, 1353 ± 70 mg SO42−·L−1), and poor biodegradability. The experiments revealed that electrochemical oxidation of LLs using BDD 0.5 k and current density (j) = 100 mA·cm−2 was the most effective amongst those tested (C8h/C0: COD = 0.09 ± 0.14 mg·L−1, N-NH4+ = 0.39 ± 0.05 mg·L−1). COD removal fits the model of pseudo-first-order reactions and N-NH4+ removal in most cases follows second-order kinetics. The double increase in biodegradability index—to 0.22 ± 0.05 (BDD 0.5 k, j = 50 mA·cm−2) shows the potential application of EO prior biological treatment. Despite EO still being an energy consuming process, optimum conditions (COD removal > 70%) might be achieved after 4 h of treatment with an energy consumption of 200 kW·m−3 (BDD 0.5 k, j = 100 mA·cm−2).

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