EPA develops process to destroy Kepone

Motl, Mary Lou

doi:10.1007/bf01866683

Cited by 2 publications

(2 citation statements)

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“…21,22 After the Hopewell disaster in the 1970s there has been a short-lived flurry of research into the environmental fate of chlordecone including some work on biodegradation, funded by the fines levied on Allied Chemicals. 23 Orndorff and Colwell performed experiments under aerobic conditions and detected potential degradation products of chlordecone but limited to removal of 1 or 2 chlorine atoms from the carbon backbone. 24 Experiments conducted under anaerobic conditions 25,26 were more promising.…”

Section: ■ Introductionmentioning

confidence: 99%

Gibbs Free Energy of Formation of Chlordecone and Potential Degradation Products: Implications for Remediation Strategies and Environmental Fate

Dolfing

Novak

Archelas

et al. 2012

Environ. Sci. Technol.

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Chlordecone (C 10 Cl 10 O; CAS number 143-50-0) has been used extensively as an organochlorine insecticide but is nowadays banned under The Stockholm Convention on Persistent Organic Pollutants (POPs). A search for chlordecone-respiring organisms and choosing between reductive versus oxidative remediation tools and strategies to clean up chlordecone-polluted environments would benefit from the availability of Gibbs free energy data of chlordecone and its potential dechlorination products. Presently such data are not available. Polycyclic "cage" molecules of which chlordecone is an example contain considerable strain energy. It is not a priori clear how this affects the thermodynamic properties of the chlorinated members of this unique class of compounds and to what extent redox potentials for the halogenated congeners are different from those of other aliphatic and aromatic organohalogens. We performed ab initio quantum chemical calculations to estimate Δ f H m °and Δ f G m °values of chlordecone and selected dechlorination products and used these data to calculate their Gibbs free energy and redox potential. With redox potentials in the range of 336−413 mV chlordecone has an E o ′ value similar to that of other organochlorines. The results indicate that there are no thermodynamic reasons why chlordecone-respiring or -fermenting organisms should not exist.

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Section: ■ Introductionmentioning

confidence: 99%

Gibbs Free Energy of Formation of Chlordecone and Potential Degradation Products: Implications for Remediation Strategies and Environmental Fate

Dolfing

Novak

Archelas

et al. 2012

Environ. Sci. Technol.

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“…4 The only previous phytochemical study reported for this species was published by Frizzo et al 5 By contrast, the essential oil of B. dracunculifolia, commercially known as vassoura oil, has been studied by several authors. [6][7][8][9][10][11][12][13][14][15][16][17][18] This oil has importance in the perfumery industry, mainly due to the presence of the sesquiterpene alcohol (E)-nerolidol, responsible for the herbaceous and green notes of the oil. The differences observed in the composition of this oil for populations of Brazil, Bolivia and Uruguay suggest the existence of chemotypes.…”

Section: Introductionmentioning

confidence: 99%

Essential oil variability in Baccharis uncinella DC and Baccharis dracunculifolia DC growing wild in southern Brazil, Bolivia and Uruguay

Frizzo¹,

Atti-Serafini

Laguna

et al. 2008

Flavour & Fragrance J

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Essential oils of Baccharis uncinella DC and B. dracunculifolia DC collected from different wild populations growing in Bolivia, southern Brazil and Uruguay were analysed using gas chromatography and gas chromatographymass spectrometry techniques, to check for chemical variability. Cluster analysis led to the identi¼cation of two chemotypes for B. dracunculifolia, related to aromadendrane-or cadinane-derived components. As the timing of sampling of the plant material may have an in½uence on the composition of the essential oil isolated, the seasonal in½uence at the moment of harvesting was studied for two populations of each species. The results suggested that the ½owering season was optimal both species and this supported the practice of harvesting at the full bloom stage.

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EPA develops process to destroy Kepone

Cited by 2 publications

References 0 publications

Gibbs Free Energy of Formation of Chlordecone and Potential Degradation Products: Implications for Remediation Strategies and Environmental Fate

Gibbs Free Energy of Formation of Chlordecone and Potential Degradation Products: Implications for Remediation Strategies and Environmental Fate

Essential oil variability in Baccharis uncinella DC and Baccharis dracunculifolia DC growing wild in southern Brazil, Bolivia and Uruguay

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