Abstract. The purpose of the study is to assess the ecological state of soils within urbanozems in relation to the degree of contamination with heavy metals using the example of the urban aggromeration of Orenburg. Methods. Sampling was carried out at 4 sites in the sanitary protection zone of industrial enterprises in Orenburg. Determination of mobile forms of heavy metals Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn in the samples was carried out by atomic absorption spectrophotometry. In the studied areas, the pollution index or concentration coefficient was taken into account, while taking into account the reference values of heavy metals. Contamination with toxic elements of soils in the reference areas was determined using the PINemerow coefficient. The pollution index of urban areas was calculated as the arithmetic or geometric mean of PINemerow for all reference areas in the city. Statistical processing of the material was carried out using the universal program Statistica 10. The scientific novelty of the work lies in the fact that for the first time data were obtained characterizing the accumulation of heavy metals in the sanitary protection zones of industrial enterprises in the city of Orenburg, and they were ranked according to the pollution index. Results. The analysis of the data obtained made it possible to reveal an increased content of Pb, Zn in all soil layers in the reference plot No. 1. The soils of site No. 2 had an increased content of Cu, Pb, Zn in the soil horizon of 20-30 cm, Pb was also found at a depth of 0-10 cm, which is explained by the passage of a major highway near the enterprise. Soil samples at a depth of 0-10 cm of site No. 3 were contaminated by 4 parameters (Cd, Mn, Pb, Zn) and had an average degree of anthropogenic pollution, which is due to the fact that the surface soils of the sanitary protection zone of the site are located near the enterprise associated with the processing of petroleum products. On the contrary, the studied areas No. 1; 2 and 4 sanitary protection zones of enterprises can be classified as low pollution. On the territory of the sanitary protection zone of site No. 4, an increased accumulation of Mn was found in the surface layers of soils.
soils, urbanozem, anthropogenic pollution, pollutants, heavy metals
1. Shubenkov M. V., Shubenkova M. Yu. Sovremennaya urbanizaciya: perspektivy razvitiya // Biosfernaya sovmestimost': chelovek, region, tehnologii. 2021. № 2. S. 3-13. DOI:https://doi.org/10.21869/2311-1518-2021-34-2-3-13.
2. Zaborova E. N. Buduschee gorodov v informacionno-cifrovuyu epohu // Vestnik Permskogo nacional'nogo issledovatel'skogo politehnicheskogo universiteta. Social'no-ekonomicheskie nauki. 2020. № 2. S. 124-133. DOI:https://doi.org/10.15593/2224-9354/2020.2.10.
3. Naprasnikova E. V. Sanitarno-mikrobiologicheskie i biohimicheskie svoystva pochv industrial'nogo goroda Usol'e-Sibirskoe // Sibirskiy medicinskiy zhurnal. 2019. T. 159. № 4. S. 55-57. DOI:https://doi.org/10.34673/ismu.2019.26.27.012.
4. Radomskaya V. I., Borodina N. A. Ocenka antropogennogo zagryazneniya pochvy urbanizirovannoy territorii na primere goroda Blagoveschenska // Geoekologiya. Inzhenernaya geologiya, gidrogeologiya, geokriologiya. 2019. № 6. S. 79-93. DOI:https://doi.org/10.31857/S0869-78092019679-93.
5. Petuhov A. S., Kremleva G. A., Petuhova G. A., Hritohin N. A. Akkumulyaciya i migraciya tyazhelyh metallov v pochvah i rasteniyah v usloviyah antropogennogo zagryazneniya gorodskoy sredy // Trudy Karel'skogo nauchnogo centra Rossiyskoy akademii nauk. 2022. № 3. S. 53-66. DOI:https://doi.org/10.17076/eco1342.
6. Stockaya D. R., Fazylov I. Z., Stockiy K. S. Zagryaznenie pochvy tyazhelymi metallami i ih vliyanie na zdorov'e cheloveka // Nauka cherez prizmu vremeni. 2019. № 7 (28). S. 29-31.
7. Evstropov V. M. Ekologo-modificiruyuschee vliyanie zagryazneniya pochvy tyazhelymi metallami na kontaktnoe vzaimodeystvie leykocitov cheloveka // Zhivye i biokosnye sistemy. 2019. № 27. DOI:https://doi.org/10.18522/2308-9709-2019-27-6.
8. Sivuhin A. N., Markov D. S., Borisova E. A. Vliyanie zagryazneniya pochv tyazhelymi metallami na zdorov'e naseleniya Ivanovskoĭ i Kostromskoĭ oblasteĭ // Problemy regional'noy ekologii. 2019. № 3. S. 81-86. DOI:https://doi.org/10.24411/1728-323X-2019-13081.
9. Gabaraeva Z. G., Makieva D. Ch. Deystvie tyazhelyh metallov na organizm cheloveka // Obrazovanie i pravo. 2020. № 11. S. 302-304. DOIhttps://doi.org/10.24411/2076-1503-2020-11146.
10. Baybotaeva A. D., Kenzhalieva G. D., Bosak V. N. Tyazhelye metally v pochvah urbanizirovannyh territoriy // Vestnik Belorusskoy gosudarstvennoy sel'skohozyaystvennoy akademii. 2019. № 4. S. 126-130.
11. Korel'skaya T. A., Popova L. F. Tyazhelye metally v pochvenno-rastitel'nom pokrove selitebnogo landshafta goroda Arhangel'ska // Arktika i sever. 2012. № 7. S. 136-152.
12. Nikiforova E. M. Dinamika zagryazneniya gorodskih pochv svincom (na primere Vostochnogo okruga Moskvy) // Pochvovedenie. 2007. № 8. S. 984-997.
13. Sincov A. V., Barmin A. N., Zimovec P. A., Valov M. V. Geoekologicheskaya ocenka sovremennogo soderzhaniya svinca v pochvennom pokrove urbanizirovannyh territoriy Nizhnego Povolzh'ya // Geologiya, geografiya i global'naya energiya. 2021. № 2 (81). S. 137-144. doi:https://doi.org/10.21672/2077-6322-2021-81-2-137-144.
14. Korlyakov I. D., Kasimov N. S., Kosheleva N. E. Tyazhelye metally i metalloidy v pochvennom pokrove goroda Ulan-Ude // Vestnik Permskogo nacional'nogo issledovatel'skogo politehnicheskogo universiteta. Prikladnaya ekologiya. Urbanistika. 2019. № 3. S. 120-137. DOI:https://doi.org/10.15593/2409-5125/2019.03.09.
15. Wu Y., Li X., Yu L., Wang T., Wang J., Liu T. Review of soil heavy metal pollution in China: Spatial distribution, primary sources, and remediation alternatives // Resources, Conservation and Recycling. 2022. Vol. 181. Article number 106261. DOI:https://doi.org/10.1016/j.resconrec.2022.106261.
16. Karim Z., Qureshi B. A., Mumtaz M. Geochemical baseline determination and pollution assessment of heavy metals in urban soils of Karachi, Pakistan // Ecological Indicators. 2015. Vol. 48. Pp. 358-364. DOI:https://doi.org/10.1016/j.ecolind.2014.08.032.
17. Bradham K. D., Laird B. D., Rasmussen P. E., Schoof R. A., Serda S. M., Siciliano S. D., Hughes M. F. Assessing the bioavailability and risk from metal-contaminated soils and dusts // Human and Ecological Risk Assessment: An International Journal. 2014. Vol. 20. No. 1. Pp. 272-286. DOI:https://doi.org/10.1080/10807039.2013.802633.
18. Karbasnikova E. B., Zalyvskaya O. S., Chuhina O. V. Soderzhanie tyazhelyh metallov v pochve i drevesnoy rastitel'nosti v usloviyah gorodskoy aglomeracii //Izvestiya vysshih uchebnyh zavedeniy. Lesnoy zhurnal. 2019. № 5 (371). S. 216-223. DOI:https://doi.org/10.17238/issn0536-1036.2019.5.216.
19. Lastkov D. O., Dubovaya A.V., Ezheleva M.I., Ostrenko V.V. Ocenka biomarkerov, kak pokazateley vliyaniya tyazhelyh metallov na zdorov'e vzroslogo naseleniya. // Universitetskaya klinika. 2022. T. 44. № 3. S. 5-13.
20. Tong S., Li H., Wang L., Tudi M., Yang L. Concentration, spatial distribution, contamination degree and human health risk assessment of heavy metals in urban soils across China between 2003 and 2019 - a systematic review // International journal of environmental research and public health. 2020. Vol. 17. No. 9. Article number 3099. DOI:https://doi.org/10.3390/ijerph17093099.
21. Adimalla N. Heavy metals pollution assessment and its associated human health risk evaluation of urban soils from Indian cities: a review // Environmental geochemistry and health. 2020. Vol. 42. No. 1. Pp. 173-190. DOI:https://doi.org/10.1007/s10661-019-7408-1.
22. Arestova I. Yu., Opekunova M. G., Elsukova E. Yu., Kukushkin S. Yu. Izmeneniya soderzhaniya tyazhelyh metallov v pochvah Kostomukshskogo regiona pod vliyaniem tehnogeneza // Mezhdunarodnyy nauchno-issledovatel'skiy zhurnal. 2020. № 1-1 (91). S. 48-52. DOI:https://doi.org/10.23670/IRJ.2020.91.1.010.
23. D'yakova N. A., Gaponov S. P., Slivkin A. I. Izuchenie nakopleniya tyazhelyh metallov i mysh'yaka i ocenka vliyaniya pollyutantov na soderzhanie flavonoidov u polygonumaviculare (Caryophyllales, Polygonaceae) // Vestnik Kamchatskogo gosudarstvennogo tehnicheskogo universiteta. 2019. № 48. S. 71-77. DOI:https://doi.org/10.17217/2079-0333-2019-48-71-77.
