QUANTITATIVE ASSESSMENT OF THE CONDITION OF SUBSOIL GEOCHEMICAL MESOBARRIERS IN KURSK

Aim. The approbation of quantitative assessment of contrast of the acid-base barriers and capacity of humus geochemical barriers and the assessment of capacity of subsoil barrier with use of geochemical Mn-containing incrustations. Methods. The сlay loamy and sandy soils of representative geochemical catenas of Kursk with different degree of anthropogenic transforming were under analysis. Results. It is revealed that the anthropogenic transformed soils of industrial and residential zones (urban grey soils, urbanozem) can be characterized by the alkaline barrier. In clay loamy and sandy soils of sanitary protection areas of the city acid and alkaline barriers are presented. The contrast of acid (-0.017 m-1) and alkaline (0.008 m-1) barriers in clay loamy soils is much higher than in sandy soils. Values of geo chemical the Mn-containing soil incrustations for the illuvial horizons in Kursk are received. Alluvial gley soils are characterized by the maximum absorbing ability of heavy metals on the Mn-containing soil  incrustations. Conclusions. The new indicator of quantitative assessment of capacity of humus horizon  – placement rate of organophile heavy metals on the barrier (Khum) is offered. The placement rate represents the ratio of the product of depth of horizon and degree of humus content to the content level of an element in the horizon. The capacity of a humus barrier increases if the value of placement rate is higher.

geochemical barrier, heavy metals, placement rate, soil, catena, Kursk

1. Doklad o sostoyanii i okhrane okruzhayushchei sredy na territorii Kurskoi oblasti v 2017 godu [The report on a state and environmental protection in the territory of Kursk region in 2017]. Kursk, 2018, 192 p. (In Russian)

2. Perel'man A.I., Kasimov N.S. Geokhimiya landshafta [Landscape geochemistry]. Moscow, Astreya-2000 Publ., 1999, 763 p. (In Russian)

3. Maksimovich N.G., Khairulina E.A. Geokhimicheskie bar'ery i okhrana okruzhayushchei sredy [Geochemical barriers and environmental protection]. Perm', Perm State University Publ., 2011, 248 p. (In Russian)

4. Glazovskaya M.A. Geochemical barriers in plain soils, their typology, functional characteristics and environmental importance. Vestnik Moskovskogo Universiteta. Seria 5, Geografia [Moscow University Bulletin. Series 5, Geography]. 2012, no. 1, pp. 8-14 (In Russian)

5. Vodyanitskii Yu.N. Tyazhelye metally i metalloidy v pochvakh [Heavy metals and metalloids in soils]. Moscow, Soil Institute named after V.V. Dokuchaev Publ., 2008, 85 p. (In Russian)

6. Vodyanickij Yu.N. Indicators of fixing of heavy metals and metalloids in soils of the Central Cis-Urals. Byulleten' Pochvennogo instituta imeni V.V. Dokuchaeva [Bulletin of Dokuchayevs Soil institute]. 2009, vol. 63, pp. 63-73. (In Russian)

7. Vodyanitskii Yu.N., Dobrovol'skii V.V. Zhelezistye mineraly i tyazhelye metally v pochvakh [Ferruterous minerals and heavy metals in soils]. Moscow, Soil Institute named after V.V. Dokuchaev Publ., 1998, 214 p. (In Russian)

8. Kasimov N.S., Vorob'ev A.E. Geokhimicheskie bar'ery v zone gipergeneza [Geochemical barriers in a hyper genesis zone]. Moscow, Moscow University Publ., 2002, 394 p. (In Russian)

9. Nevedrov N.P., Protsenko E.P., Fomina M.Yu. Ecological assessment of soils in the landscape- geochemical catena of the Seimsky district of Kursk. Ekologiya urbanizirovannykh territorii [Ecology of urban areas]. 2017, no. 3, pp. 18-26. (In Russian)

10. Nevedrov N.P. Classification of soil damages of Kursk city ecosystems. Astrakhanskii vestnik ekologicheskogo obrazovaniya [Astrakhan Bulletin for Environmental Education]. 2018, no. 2 (44), рр. 111-118. (In Russian)

11. Nevedrov N.P., Protsenko E.P., Glebova I.V. The Relationship between Bulk and Mobile Forms of Heavy Metals in Soils of Kursk. Eurasian Soil Science. 2018, vol. 51, iss. 1, pp. 112-119.

12. Nevedrov N.P., Kurasova V.I. Heavy metals in Tissues and Organs Populus pyramidalis. Proceedings of Universities. Applied Chemistry and Biotechnology, 2018, vol. 8, no. 2(25), pp. 124-130. (In Russian) DOI: 10.21285/2227-2925-2018-8-2-125-131