Self-purification of aquatic media from hexachlorocyclohexane in a radical process
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2019-07-23 09:15
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TRAVIN, Serghei; DUCA, Gheorghe; GLADCHI, Viorica. Self-purification of aquatic media from hexachlorocyclohexane in a radical process. In: Chemistry Journal of Moldova. 2019, nr. 1(14), pp. 47-53. ISSN 1857-1727.
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Chemistry Journal of Moldova
Numărul 1(14) / 2019 / ISSN 1857-1727 /ISSNe 2345-1688

Self-purification of aquatic media from hexachlorocyclohexane in a radical process


DOI: 10.19261/cjm.2018.537
Pag. 47-53

Travin Serghei1, Duca Gheorghe23, Gladchi Viorica4
 
1 N.N. Semenov Institute of Chemical Physics, Russian Academy of Sciences,
2 Institute of Chemistry,
3 Academy of Sciences of Moldova,
4 State University of Moldova
 
Disponibil în IBN: 8 iulie 2019


Rezumat

It is known, that highly toxic pesticide hexachlorocyclohexane (HCH) is resistant to decomposition and has a long-term accumulating capacity. Nevertheless, it undergoes complete degradation in reactions with hydroxyl radicals in Fenton-like systems. The goal of this work was to study the influence of HCH on the processes of radical self-purification of water bodies and to explain the mechanisms of chemical transformation of substances occurring in natural waters, as well as to reveal the kinetic characteristics of the processes of radical self-purification of water bodies. It was found, that HCH plays a dual role for aquatic ecosystems – it is not only a scavenger of free radicals, but also an additional initiator. Under the influence of light in the surface layer of water, HCH generates radicals, thus contributing to the self-purification processes.

Cuvinte-cheie
hexachlorocyclohexane, natural water, radical self-purification, kinetic characteristic