Removal of Bentazone Pesticide from Aqueous Solutions by Electro-oxidation Method

Electrochemical oxidation of tiron in the presence of H2O as a nucleophile in strongly acidic aqueous solutions was studied by cyclic voltammetry, controlled-voltage coulometry and spectrometric investigations. The mechanism of electrochemical reaction is confirmed by spectrophotometric tracing in various times of controlled-voltage coulometry. The voltammetric and spectrophotometric foundations indicate that a 1,4-Michael addition of H2O from its hydroxy moiety to the position 4 of electrochemically derived o-quinone is occurred. The electrochemical oxidation and reduction of tiron has been successfully accomplished by controlled-voltage coulometry in a redox flow-through type cell and the final electro-reduced product was characterized by spectrophotometric, 1H NMR and mass spectrometric methods. It is demonstrated that the electro-oxidation of tiron follows an ECE mechanism in acidic aqueous solutions, leading to formation of a new compound of para- benzoquinone derivative.

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APPLICATION OF ELECTRO-OXIDATION METHOD FOR TREATMENT OF DYE TEXTILE WASTEWATER USING STAINLESS STEEL ELECTRODE: STUDY OF ELECTROLYTE CONCENTRATION EFFECT TO COLOR REMOVAL

Eksakta Jurnal Ilmu-Ilmu MIPA ◽

10.20885/eksakta.vol17.iss2.art6 ◽

2017 ◽

Vol 17 (2) ◽

pp. 147-153

Author(s):

Jumardin Rua ◽

Mega Maghfirotul Fajrin ◽

Zaina Rohayati ◽

Riyanto Riyanto

Keyword(s):

Stainless Steel ◽

Electrolyte Concentration ◽

Textile Wastewater ◽

Color Removal ◽

Concentration Effect ◽

Stainless Steel Electrode ◽

Steel Electrode ◽

Oxidation Method ◽

Electro Oxidation

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Electrolytes for methanol-air fuel cells. 11. The electro-oxidation of methanol in trifluoromethane-sulphonic acid monohydrate and aqueous solutions of trifluoromethane-sulphonic acid

Journal of Applied Electrochemistry ◽

10.1007/bf00611039 ◽

1977 ◽

Vol 7 (2) ◽

pp. 161-174 ◽

Cited By ~ 9

Author(s):

V. B. Hughes ◽

B. D. McNicol ◽

M. R. Andrew ◽

R. B. Jones ◽

R. T. Short

Keyword(s):

Fuel Cells ◽

Aqueous Solutions ◽

Sulphonic Acid ◽

Oxidation Of Methanol ◽

Electro Oxidation

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Electro-oxidation of sodium lauryl sulfate aqueous solutions

Journal of Applied Electrochemistry ◽

10.1007/bf01016049 ◽

1988 ◽

Vol 18 (6) ◽

pp. 904-908 ◽

Cited By ~ 11

Author(s):

F. Vigo ◽

C. Uliana ◽

M. Novi

Keyword(s):

Aqueous Solutions ◽

Sodium Lauryl Sulfate ◽

Lauryl Sulfate ◽

Electro Oxidation

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Selective Leaching of Molybdenum from Bulk Concentrate by Electro-Oxidation

Metals ◽

10.3390/met11121904 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1904

Author(s):

Kyeong Woo Chung ◽

Ho-Sung Yoon ◽

Chul-Joo Kim ◽

Ho-Seok Jeon

Keyword(s):

Current Density ◽

Ultrasonic Irradiation ◽

Pulp Density ◽

Density Current ◽

Selective Leaching ◽

Nacl Solution ◽

Oxidation Method ◽

Cu Complex ◽

Electro Oxidation

This paper proposes selective leaching of molybdenum from Mo/Cu complex bulk concentrates in a 5 M NaCl solution using the electro-oxidation method. Here, the effects of several factors such as pH, pulp density, current density, and temperatures were investigated. A higher leaching yield of Mo increased with increasing pH from 5 to 9 and decreased with increasing pulp density from 1 to 10%. A rise in current density did not help enhance Mo, and the elevating temperature did not always result in a higher leaching yield. Application of ultrasonic led to higher leaching yield of Mo. Ninety-two percent of leaching yield was obtained upon leaching of Mo in 5 M NaCl at 25 °C, pulp density of 5%, and the current density of 0.292 A/g under ultrasonic irradiation with a power of 27 kW. The resultant residue mainly consisted of chalcopyrite.

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