Dechlorination of PCBs by electrochemical reduction with aromatic radical anion as mediator

Matsunaga, Atsushi; Yasuhara, Akio

doi:10.1016/j.chemosphere.2004.09.048

Cited by 22 publications

(23 citation statements)

References 8 publications

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“…The irreversible peak at À2.305 V (at 0.1 V s À1 ) pertains to the reduction of two chlorines. The reversible peak at À2.730 V indicates the reduction of biphenyl [9]. Since the peak at À2.305 V in the cyclic voltammogram arises from the merging of the peaks for the reduction of the two chlorines, it is necessary to carry out differential pulse voltammetry (DPV) for ascertaining the separation in potentials.…”

Section: Resultsmentioning

confidence: 99%

Regioselective electrochemical reduction of 2,4-dichlorobiphenyl – Distinct standard reduction potentials for carbon–chlorine bonds using convolution potential sweep voltammetry

Muthukrishnan¹,

Sangaranarayanan²,

Boyarskiy³

et al. 2010

Chemical Physics Letters

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Section: Resultsmentioning

confidence: 99%

Regioselective electrochemical reduction of 2,4-dichlorobiphenyl – Distinct standard reduction potentials for carbon–chlorine bonds using convolution potential sweep voltammetry

Muthukrishnan¹,

Sangaranarayanan²,

Boyarskiy³

et al. 2010

Chemical Physics Letters

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“…Matsunaga and co-workers have reported the electrochemical reduction of several chlorobenzenes in the presence of aromatic radical anions and its application to PCBs [20]. They also reported a rapid and complete dechlorination of an excess amount of 1-chloronaphthalene, which simultaneously reacts as a reactant and a mediator [21].…”

Section: Introductionmentioning

confidence: 96%

Complete electrochemical dechlorination of chlorobenzenes in the presence of various arene mediators

Jalil

Triwahyono

Razali

et al. 2010

Journal of Hazardous Materials

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Electrochemical dechlorination of chlorobenzenes in the presence of various arene mediators such as naphthalene, biphenyl, phenanthrene, anthracene, and pyrene, was studied. The amount of mediator required was able to be reduced to 0.01 equiv. for all mediators except for anthracene, with the complete dechlorination of mono-, 1,3-di- and 1,2,4-trichlorobenzene still achieved. This catalytic amount of mediator plays an important role in accelerating the dechlorination through the rapid formation of radical anions prior to reduction of the chlorobenzenes.

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“…They investigated the relationship between progressive stages of dismantling and cleaning needed to remove PCBs from transformer components using n-hexane as a solvent. Matsunaga and Yasuhara (2005) applied mediated electrochemical reduction to dechlorination of PCBs in tetra n-butylammonium perchlorate/dimethylformammide. Rapid and complete dechlorination was possible with biphenyl or naphthalene as a mediator, whereas the reaction was much slower with anthracene or 9,10-diphenyl anthracene.…”

Section: Introductionmentioning

confidence: 99%

Chemical dechlorination of polychlorinated biphenyls (PCBs) from dielectric oils

Cafissi

Beduschi²,

Balacco³

et al. 2007

Environ Chem Lett

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We studied the chemical dechlorination of the polychlorinated biphenyls (PCBs) in some dielectric oils via nucleophilic substitution of the chloro atoms by polyethylene alkoxide. The influence of temperature, ultrasounds, polyethylene glycol (PEG) and base type was investigated. Our findings show that dechlorination of PCBs by chemical treatment is effective at moderate temperature (90-100 • C) and is strongly dependent on the nature of matrix oil. Stirring affects the process yield by influencing the homogeneity of the oil/glycol two-phase system. Ultrasounds can improve the process efficiency by making operating conditions less severe.

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Dechlorination of PCBs by electrochemical reduction with aromatic radical anion as mediator

Cited by 22 publications

References 8 publications

Regioselective electrochemical reduction of 2,4-dichlorobiphenyl – Distinct standard reduction potentials for carbon–chlorine bonds using convolution potential sweep voltammetry

Regioselective electrochemical reduction of 2,4-dichlorobiphenyl – Distinct standard reduction potentials for carbon–chlorine bonds using convolution potential sweep voltammetry

Complete electrochemical dechlorination of chlorobenzenes in the presence of various arene mediators

Chemical dechlorination of polychlorinated biphenyls (PCBs) from dielectric oils

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