Chemical Safety Science, 2017, Volume 1, No 2, p. 117 — 129

 

Federal targeted programs

УДК 66-9                                                                                            Download PDF (Rus)

DOI: 10.25514/CHS.2017.2.10986

 

TECHNOLOGY FOR REMEDIATION OF SOILS CONTAMINATED WITH CHLORINE-CONTAINING TOXIC AGROCHEMICALS

Yu. A. Eleev*, M. V. Korol’kov, N. Yu. Simonova, V. V. Afanas’ev, and V. Surovtsev

Federal State Unitary Enterprise “State Research Institute of Organic Chemistry and Technology”, Moscow, Russia

Received October 20, 2017

Published December 25, 2017

Abstract – The main known remediation techniques for cleaning up contaminated territories are reviewed. A procedure for remediation of soils contaminated with chlorine-containing toxic compounds (i.e. hexachlorobenzene, hexachlorocyclohexane) is proposed. The technology involves thermal detoxification of contaminated soils in a drum-type furnace within the temperature range of 700-800°C, followed by reburning of residual organic substances in an afterburner and subsequent conditioning at 1200°С under excess of oxygen of no less than 3% within 2-3 seconds. The effectiveness of the developed technology has been confirmed in experimental conditions as exemplified by successful neutralization of soils contaminated with hexachlorobenzene and hexachlorocyclohexane with the initial content of these toxicants of 18,29 mg/kg and 4,26 mg/kg, respectively. Basing on the comparative analysis performed, as well as on the calculations carried out, a technological scheme of the appropriate industrial plant (comprising a gas cleaning system) has been designed.

Keywords: pesticides, agrochemicals, contaminated soils, thermal detoxification, persistent organic pollutants.