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The reason why there is chromic acid in acid waste water is that

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The reason why there is chromic acid in acid waste water is that
Comparative Study of Commercial Oxide Electrodes ...
Comparative Study of Commercial Oxide Electrodes ...

concentration of RO7, pH, conductive electrolyte and time of ,electrolysis, were studied and optimized. After 15 min, nearly complete degradation of RO7 was achieved (97.66%, 95.33 and 94.60%) using C/PbO

Reactive Black 5 Treatment and Hydrogen Production by PEM ...
Reactive Black 5 Treatment and Hydrogen Production by PEM ...

oxidation of a sacrificial ,electrode, made of carbon steel mesh is produced. The generation of ,iron, ions in the anolyte is harnessed for the development of a Fenton type process in the presence of H2O2

Determination of the Efficiency of Different Modified ...
Determination of the Efficiency of Different Modified ...

potassium, chloride, sodium hydroxide, sulphuric ,acid,, ,potassium dichromate,, silver sulfate were of analytical grade and purchased from Merck. Distilled water was used for the preparation of solutions. Standard solutions ,of potassium dichromate, (K 2 Cr 2 O 7), sulfuric ,acid, (H 2 SO 4) reagent with silver sulfate (Ag 2 SO 4

CN103668301B - Electrolysis is utilized to prepare the ...
CN103668301B - Electrolysis is utilized to prepare the ...

A kind of method utilizing ,electrolysis, to prepare chromium ,acid, sodium solution comprises the following steps: provide ,electrolysis, unit, including ,electrolysis, bath, power supply, industry ferrochrome, negative ,electrode, and barrier film;Being arranged in a cell with cathode separation by industry ferrochrome, described industry ferrochrome is connected with the positive electrical of ...

Tertiary treatment of wastewater by electro-coagulation ...
Tertiary treatment of wastewater by electro-coagulation ...

iron, or EF ,iron, and ,iron,-platinum for AEO Pt. The specific surface areas of the electrodes were 28.5 cm2 and 8 cm2 for ,iron, and platinum electrodes, respectively. The ,electrode, gap was 2 cm. The solution volume was 0.5 dm3. The temperature was kept constant at 25 °C. Magnetic stirring was maintained during the experiments. EC ,iron, and EF ,iron

Study on pretreatment of regeneration papermaking ...
Study on pretreatment of regeneration papermaking ...

Fe/C than the big surplus will cause ,iron, filings, the rest of the ,iron, filings participate in the displacement reaction of H + , increase the invalid ,iron, dissolution, and . ... Study on pretreatment of regeneration papermaking ,wastewater, by intensified micro ,electrolysis, .

Purification of grey water by electrocoagulation process using
Purification of grey water by electrocoagulation process using

supply with variant current density; ,iron,-,iron, electrodes of identical dimensions (2.0 cm × 2.0 cm × 0.2 cm) were used as anode and cathode. HCl solution to remove organic and inorganic deposits. For each run, the inter-,electrode, gap, ,electrolysis, time (t), ,electrode, type, pH, temperature and current density were changed. Experiments

Water | Free Full-Text | A Comparison of the Mechanism of ...
Water | Free Full-Text | A Comparison of the Mechanism of ...

Choosing RhB ,wastewater, as one kind of dye ,wastewater,, this paper is going to analyze the mechanism of the TOC and COD degradation of RhB ,wastewater, in the aspect of mass transfer, the electrochemically active surface area (EASA) of electrodes, the instant concentration of hydroxyl radicals (·OH), current efficiency (CE), and energy consumption (Es) in the recycling-flow 3D electro-reactor system, …

Mehmet A. Oturan Degradation of azo dyes in water by ...
Mehmet A. Oturan Degradation of azo dyes in water by ...

acid, and sulfuric ,acid, were purchased at the purest grade (Prolabo). ,Potassium dichromate, and ammonium ,iron,(II) sulfate hexahydrate (Mohr salt) Fe(NH. 4) 2 (SO. 4) 2 ·6H. 2. O used for chemical oxygen demand (COD) analysis were purchased from Aldrich. Solutions were prepared with deionized water (resistivity 18.2 M. W.cm) from a Milli-pore ...

Removal of Organic Matter from Paper Mill Effluent by ...
Removal of Organic Matter from Paper Mill Effluent by ...

wastewater, (black liquor) in a 2 dm3 electrolytic batch reactor using ,iron, plate electrodes. Under optimal condi-tions (current density 55.56 A/m2 at neutral pH with a six-plate arrangement), 80% and 90% of COD and color were removed, respectively. The authors found that treatment time could be …

Investigation of a novel pyrolusite particle electrode ...
Investigation of a novel pyrolusite particle electrode ...

Finally, PTFE can form an excellent porous structure in the particle electrode under 330 °C calcination conditions, increase the specific surface area of the particle electrode, strengthen the mass transfer and electrolysis reaction process and has outstanding recovery and regeneration ability (Sheng et al. 2011; Dong et al. 2012; Chen et al. 2014).

Determination of the Efficiency of Different Modified ...
Determination of the Efficiency of Different Modified ...

potassium, chloride, sodium hydroxide, sulphuric ,acid,, ,potassium dichromate,, silver sulfate were of analytical grade and purchased from Merck. Distilled water was used for the preparation of solutions. Standard solutions ,of potassium dichromate, (K 2 Cr 2 O 7), sulfuric ,acid, (H 2 SO 4) reagent with silver sulfate (Ag 2 SO 4

Electrochemical Degradation of Reactive Yellow 160 Dye in ...
Electrochemical Degradation of Reactive Yellow 160 Dye in ...

After 20 min of continuous anodization , the ,electrode, was taken out of the ,electrolysis, bath and washed thoroughly in doubly distilled water followed by drying in air at 120°C for 2 h. 2.2.3. Preparation of Modified C/PbO 2 ,Electrode,. Carbon Surface Treatment.

Solar Thermo-coupled Electrochemical Oxidation of Aniline ...
Solar Thermo-coupled Electrochemical Oxidation of Aniline ...

The supporting electrolyte of Na 2 SO 4 was added to the aniline ,wastewater, for ready ,electrolysis,. ... standard ,potassium dichromate, ... synthesis of benzoic ,acid,: Role of graphite ,electrode,.

Mehmet A. Oturan Degradation of azo dyes in water by ...
Mehmet A. Oturan Degradation of azo dyes in water by ...

acid, and sulfuric ,acid, were purchased at the purest grade (Prolabo). ,Potassium dichromate, and ammonium ,iron,(II) sulfate hexahydrate (Mohr salt) Fe(NH. 4) 2 (SO. 4) 2 ·6H. 2. O used for chemical oxygen demand (COD) analysis were purchased from Aldrich. Solutions were prepared with deionized water (resistivity 18.2 M. W.cm) from a Milli-pore ...

Tertiary treatment of wastewater by electro-coagulation ...
Tertiary treatment of wastewater by electro-coagulation ...

iron, or EF ,iron, and ,iron,-platinum for AEO Pt. The specific surface areas of the electrodes were 28.5 cm2 and 8 cm2 for ,iron, and platinum electrodes, respectively. The ,electrode, gap was 2 cm. The solution volume was 0.5 dm3. The temperature was kept constant at 25 °C. Magnetic stirring was maintained during the experiments. EC ,iron, and EF ,iron

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