Electroreduction of Organic Compounds, 25 Electrochemical Dehalogenation of Chlorinated Insecticides

Gassmann, J.; Voß, Jürgen; Adiwidjaja, Ḡunadi

doi:10.1515/znb-1995-0618

Cited by 12 publications

(4 citation statements)

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“…A metabolite of high R f has a mass spectrum (Fig. 4, spectrum b) with a base peak of m/z 289 and a molecular ion of m/z 322 ( 35 Cl 6 ), similar to that described (Gassmann and Voss 1995) for 1,2,3,4,7,7‐hexachloro‐5,6‐bis(methylene) bicyclo[2.2.1]‐2‐heptene (Fig. 1).…”

Section: Discussionmentioning

confidence: 54%

Enrichment of a microbial culture capable of degrading endosulphate, the toxic metabolite of endosulfan

et al. 2002

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Aims: The aim of this study was to isolate a source of enzymes capable of degrading endosulphate (endosulfan sulphate), the toxic metabolite of the pesticide endosulfan. Methods and Results: A microbial broth culture capable of degrading endosulphate was enriched from endosulfan-contaminated soil by providing the metabolite as the sole source of sulphur in broth culture. No microbial growth was observed in the absence of endosulphate. In the presence of endosulphate, growth of the culture occurred with the concomitant formation of three chlorine-containing compounds. Thin layer chromatography and gas chromatography±mass spectral analysis identi®ed these metabolites as endosulfan monoaldehyde, 1,2,3,4,7,7-hexachloro-5,6-bis(methylene)bicyclo[2.2.1]-2-heptene and 1,2,3,4,7,7-hexachloro-5-hydroxymethylene-6-methylenebicyclo[2.2.1]-2-heptene. The second and third compounds have not been reported in previous metabolic studies. The enriched culture was also able to utilize a-and b-endosulfan as sulphur sources, each producing the hydrolysis product endosulfan monoaldehyde as the sole chlorine-containing metabolite. Alpha-endosulfan was more readily hydrolysed than the b-isomer. Conclusions: This study isolated a mixed microbial culture capable of degrading endosulphate. The products of degradation were characterized as novel endosulfan metabolites. Signi®cance and Impact of the Study: This study describes the isolation of a mixed microbial culture that is potentially a valuable source of hydrolysing enzymes for use in enzymatic bioremediation, particularly of endosulphate and a-endosulfan residues.

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Section: Discussionmentioning

confidence: 54%

Enrichment of a microbial culture capable of degrading endosulphate, the toxic metabolite of endosulfan

et al. 2002

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“…Therefore, a marked increase in their presence in air, soil and waters has been detected. Organochloride insecticides, such as hexachlorocyclohexane It has been demonstrated that electrochemical methods are an alternative means for dechlorination [2] and in the present study results obtained with the reduction of lindane at a millimetric vitreous carbon electrode and at a carbon microelectrode are reported.…”

mentioning

confidence: 62%

Electrochemical Behaviour of Hexachlorocyclohexane

Martins¹,

Medeiros²,

Montenegro³

1999

Port. Electrochim. Acta

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“…Electrochemical methods, on the other hand, have been found to be very effective for the dechlorination of PCDDs, 291 PCDFs, 291 and PCBs. 292 Gassmann et al 293 dechlorinated a number of organochlorine insecticides, including mirex (15), kepone (16), aldrin (17), chlordane (18), and alodan (19), by electrochemical reduction at a lead cathode in methanol. One of the first studies of this class of compounds was reported by Cisak.…”

Section: Chemical Reviewsmentioning

confidence: 99%

Electroreductive Remediation of Halogenated Environmental Pollutants

et al. 2016

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Electrochemical reduction of halogenated organic compounds is gaining increasing attention as a strategy for the remediation of environmental pollutants. We begin this review by discussing key components (cells, electrodes, solvents, and electrolytes) in the design of a procedure for degrading a targeted pollutant, and we describe and contrast some experimental techniques used to explore and characterize the electrochemical behavior of that pollutant. Then, we describe how to probe various mechanistic features of the pertinent electrochemistry (including stepwise versus concerted carbon-halogen bond cleavage, identification of reaction intermediates, and elucidation of mechanisms). Knowing this information is vital to the successful development of a remediation procedure. Next, we outline techniques, instrumentation, and cell designs involved in scaling up a benchtop experiment to an industrial-scale system. Finally, the last and major part of this review is directed toward surveying electrochemical studies of various categories of halogenated pollutants (chlorofluorocarbons; disinfection byproducts; pesticides, fungicides, and bactericides; and flame retardants) and looking forward to future developments.

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Electroreduction of Organic Compounds, 25 Electrochemical Dehalogenation of Chlorinated Insecticides

Cited by 12 publications

References 0 publications

Enrichment of a microbial culture capable of degrading endosulphate, the toxic metabolite of endosulfan

Enrichment of a microbial culture capable of degrading endosulphate, the toxic metabolite of endosulfan

Electrochemical Behaviour of Hexachlorocyclohexane

Electroreductive Remediation of Halogenated Environmental Pollutants

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