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Russian Journal of Physical Chemistry A

, Volume 93, Issue 1, pp 102–105 | Cite as

Experimental Study and Kinetic Modeling of Chloroform Decomposition in Aqueous Solutions under the Action of γ-Radiation

  • Z. I. IskenderovaEmail author
  • M. A. Kurbanov
PHYSICAL CHEMISTRY OF SOLUTIONS
  • 2 Downloads

Abstract

The radiolysis of aqueous chloroform solutions (10–3–10–2 M) in the presence of dissolved oxygen is studied to establish a chain mode for the decomposition of chloroform. CO2, H2, H2O2 and chlorinated hydrocarbons-dichloromethane and dichloroethane are identified as products of the radiolysis of aqueous chloroform solutions. Changes in the pH and COD from the absorbed dose for the radiolysis of an aqueous chloroform solution with a concentration of 4.2 × 10−2 M are studied. It is found that as the dose is increased, the pH index and COD fall, indicating the decomposition of organic compounds and the formation of acids. It is shown that the radiation-chemical yields of chloroform decomposition depend on its initial concentration. At ≥4.2 × 10−2 M, they lie in the range of 52–245 molec./100 eV. A formal kinetic scheme of the processes that occur during the γ-radiolysis of aqueous chloroform solutions is compiled using the obtained data and allowing for the available literature values of the rate constants of elementary reactions.

Keywords:

chloroform ionizing radiation radiation-chemical yields chain decomposition 

Notes

REFERENCES

  1. 1.
    A. H. Dwivedi and U. C. Pande, Sci. Rev. Chem. Commun. 2, 41 (2012).Google Scholar
  2. 2.
    E. Naffrechoux, E. Combet, B. Fanget, and C. Petrier, Water Res. 37, 1948 (2003).CrossRefGoogle Scholar
  3. 3.
    B. J. Rezansoff, K. J. Mccallum, and R. J. Woods, Radiolysis of Aqueous Chloroform Solutions (Dep. Chem. Chemical Eng., Univ. of Saskatchewan, Saskatoon, Saskatchewan, 1969).Google Scholar
  4. 4.
    F. T. Mak, S. R. Zele, W. J. Cooper, et al., Kinetic Modeling of Carbon Tetrachloride, Chloroform and Methylene Chloride Removal from Aqueous Solution Using the Electron Beam Process (Drinking Water Res. Center, Florida Int. Univ., High Voltage Environ. Appl. Inc., Miami, FL, 1996), p. 219.Google Scholar
  5. 5.
    W. J. Cooper, E. Cadavid, M. G. Nickelsen, et al., J. Am. Water Works Assoc. 85 (9), 106 (1993).CrossRefGoogle Scholar
  6. 6.
    A. K. Pikaev, Modern Radiation Chemistry: Radiolysis of Gases and Liquids (Nauka, Moscow, 1987) [in Russian].Google Scholar
  7. 7.
    V. L. Bugaenko and V. M. Byakov, High Energy Chem. 32, 365 (1998).Google Scholar
  8. 8.
    G. Buxton, C. Greenstock, W. Helman, and A. Ross, J. Phys. Chem. Ref. Data 17, 513 (1988).CrossRefGoogle Scholar
  9. 9.
    A. B. Ross, W. G. Mallard, W. P. Helman, et al., NDRL–NIST Solution Kinetics Database, Version 2.0 (Natl. Inst. Standards and Technology, Gaithersburg, MD, 1994).Google Scholar
  10. 10.
    A. B. Lateef and J. B. Hyne, Effect of Pressure on the Rates of Hydrolysis of Allyl Chlorides (Dep. Chemistry, Univ. of Calgary, Calgary, 1968).Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Institute of Radiation Problems, Azerbaijan National Academy of SciencesBakuAzerbaijan

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