The content of oil products in the soil cover of Krasnoyarsk

The results of the assessment of the level of pollution by oil products (OP) of the soils of the city of Krasnoyarsk which is a large industrial center are given. The researches were executed during 2015-2017 and soil cover of three functional zones of the city was investigated. The level of pollution was estimated according to the standard gradation and on the relation to background soils: to podzols illuvial, humic and dark gray typical. The OP content was determined by the fluorimetric method using the "Fluorate-02-2M" analyzer. The activity of enzyme of urease in the soils was established on the speed of decomposition of carbamide. The greatest role in the formation of soil cover of Krasnoyarsk is accepted by urbanozyom, kulturozyom, recreazyom, replantozyom, constructozyom, psamozyom. In 220 of 264 OP investigated tests the contents was in the limits of 100-500 mg/kg, corre- sponding to the level of raised background. The greatest con- centration were characteristic for the soils of production zone of the city, here 34 % of the tests were polluted at admissible level...