Decomposition of Trichlorobenzene with Different Radicals Generated by Alternating Current Electrolysis in Aqueous Solution

Nakamura, Akinobu; Hirano, Keiji; Iji, Masatoshi

doi:10.1246/cl.2005.802

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…Even though it has been suggested that AC-polarization may induce isomerization and production of radicals or could induce oxidations and reductions in organic functions of the enzyme [10][11][12], we believe that most of the changes we observe are due to a change in pH and temperature of the solution. The pH and temperature change would induce structural modifications in the AC treated enzyme, which is reflected in the UV-vis, FT-IR and UV-CD measurements.…”

mentioning

confidence: 66%

“…Electrolysis with a periodically varying current has been used in anodic dissolution, anodizing and corrosion processes [1]; electrodeposition [2,3] heating systems [4,5]; ohmic sterilization [6]; degradation of inorganic and organic pollutants such as NO and naphthalene [7][8][9][10] and in the synthesis and chemical isomerization of metal-organic complexes [11,12]. Recently, alternating current (AC) was used for the electrophoretic deposition (EPD) of biomolecules suspended in aqueous dispersions.…”

Section: Introductionmentioning

confidence: 99%

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Effects of AC‐Electrolysis on the Enzymatic Activity of Glucose Oxidase

Ammam

Fransaer

2011

Electroanalysis

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The change in the activity of glucose oxidase subjected to an asymmetrical alternating current (AC) electric field is investigated via horseradish peroxidase (HRP)-coupled bioassay. The effect of the amplitude, frequency and enzyme concentration have been shown to affect the enzyme activity towards glucose oxidation. The decrease in the enzyme activity is directly related to the change in pH and temperature of the GOx solution during AC electrolysis. The enzyme activity reduces with increasing amplitude, enzyme concentration and decreasing frequency. Results from UV-vis, FT-IR and UV CD spectroscopy showed that the AC treated GOx samples undergo structural modifications.

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mentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Effects of AC‐Electrolysis on the Enzymatic Activity of Glucose Oxidase

Ammam

Fransaer

2011

Electroanalysis

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“…In this context, Advanced Oxidation Processes (AOPs) based on the generation of highly reactive species, such as hydroxyl or sulfate radicals (OH • or SO 4 −• ), are efficient remediation methods [ 14 , 15 , 16 ]. The oxidation of TCBs with sodium persulfate [ 17 ], Fenton’s reagent [ 18 ], ozone [ 19 ], photocatalysis [ 20 , 21 ], electrochemical processes [ 22 ], and catalytic wet oxidation (CWO) [ 23 , 24 ] have been studied. More recently, UV light has been proven to enhance TCB oxidation by persulfate [ 25 ] or hydrogen peroxide [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Vis LED Photo-Fenton Degradation of 124-Trichlorobenzene at a Neutral pH Using Ferrioxalate as Catalyst

Conte

Domı́nguez

Checa-Fernández

et al. 2022

IJERPH

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Chlorinated organic compounds (COCs) are among the more toxic organic compounds frequently found in soil and groundwater. Among these, toxic and low-degradable chlorobenzenes are commonly found in the environment. In this work, an innovative process using hydrogen peroxide as the oxidant, ferrioxalate as the catalyst and a visible light-emitting diode lamp (Vis LED) were applied to successfully oxidize 124-trichlorobenzene (124-CB) in a saturated aqueous solution of 124-TCB (28 mg L−1) at a neutral pH. The influence of a hydrogen peroxide (HP) concentration (61.5–612 mg L−1), Fe3+ (Fe) dosage (3–10 mg L−1), and irradiation level (Rad) (I = 0.12 W cm−2 and I = 0.18 W cm−2) on 124-TCB conversion and dechlorination was studied. A D–Optimal experimental design combined with response surface methodology (RSM) was implemented to maximize the quality of the information obtained. The ANOVA test was used to assess the significance of the model and its coefficients. The maximum pollutant conversion at 180 min (98.50%) was obtained with Fe = 7 mg L−1, HP = 305 mg L−1, and I = 0.12 W cm−2. The effect of two inorganic anions usually presents in real groundwater (bicarbonate and chloride, 600 mg L−1 each) was investigated under those optimized operating conditions. A slight reduction in the 124-TCB conversion after 180 min of reaction was noticed in the presence of bicarbonate (8.31%) and chloride (7.85%). Toxicity was studied with Microtox® (Azur Environmental, Carlsbad, CA, USA) bioassay, and a remarkable toxicity decrease was found in the treated samples, with the inhibition proportional to the remaining 124-TCB concentration. That means that nontoxic byproducts are produced in agreement with the high dechlorination degrees noticed.

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“…The resultant phenol production should differ from that obtained using a DC supply. The advantage of AC electrolysis over DC electrolysis has been reported for the purification of organic pollutants [16,17] and for the synthesis of chemicals. [18,19] Based on these observations and assumptions, it is expected that the electrochemical synthesis of phenol could be improved by optimizing the AC frequency for Reactions (1), (2), (3), and (4).…”

mentioning

confidence: 99%