Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

A study of the ionizing radiation impact on lindane and the active substance of «hexachlorane dust» chemical

3/22/2017 2017 - #01 Application of nuclear tech

Polyakova L.P. Melnikova T.V. Lukyanova N.N.

DOI: https://doi.org/10.26583/npe.2017.1.10

UDC: 53.043, 53.044

The article discusses the development of optimal conditions for radiation destruction of organochlorine pesticide, hexachlorocyclohexane (HCH), which is the main active ingredient of the chemical «hexachlorane dust». The pesticide decomposition is investigated in order to study the advanced radiation technologies that will be useful forrecycling process of persistent organic pollutants (POPs) included in the list approved by the Stockholm Convention in 2001. The radiation stability of one of thehexachlorocyclohexane isomer, γ-HCH, which is in the State standard sample of lindane and the pesticidal chemical was compared when they were irradiated in a dose of 117 kGy by γ-rays (dose rate was 0.28 Gy/s). A slight decrease was discovered in the degradation degree of γ-HCH which is a part of the pesticidal chemical as compared to the lindane degradation degree. It was suggested that one of the reasons of the observed effect was the bond strength of the organochlorine substances with the mineral filler of the chemical. This bond is provided by the initial adsorption and affects the mobility of the active particles formed by irradiation of the samples by γ-rays. It is shown that the established difference has no practical value. Thus, the development of optimal conditions for the pesticide destruction involving the radiation factor is quite possible. It is confirmed by the example of complex heterogeneous systems. Radiochemical transformations of the organochlorine pesticide were discussed with the involvement of dechlorination and stereoisomerization mechanisms. The obtained data give evidence of not only destruction process but also possible HCH molecules transformation after their irradiation. It has been shown that after the radiation exposure, γ-HCH is the least stable isomer and its transformation to α- and β- isomers is possible. Spatial structural changes in γ-HCH molecules and its isomers under the action of gamma rays can be explained by such redistribution of Cl atoms relative to the hydrocarbon cycle, which provides the most energetically stable state of the molecule.


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organochlorinated pesticide radiation stability degradation degree isomers: γ-HCH α-HCH β-HCH lindane pesticidal chemical hexachlorane dust γ -irradiation dose dose rate radiation destruction stereo isomerization

Link for citing the article: Polyakova L.P., Melnikova T.V., Lukyanova N.N. A study of the ionizing radiation impact on lindane and the active substance of «hexachlorane dust» chemical. Izvestiya vuzov. Yadernaya Energetika. 2017, no. 1, pp. 107-115; DOI: https://doi.org/10.26583/npe.2017.1.10 (in Russian).