Assessment of the Soil Buffer Capacity in the Sea of Azov Basin Under Heavy Metal Pollution


Heavy metals (HM) are among the most hazardous soil pollutants. The intensity of accumulation and distribution of HM in soils directly depends on the ecological conditions of pedogenesis and its buffering properties. At the same time, a significant accumulation of HM in the soil as a result of anthropogenic impacts reduces the buffering capacity of the soil and its resistance to pollution. The purpose of this work was to assess the buffering capacity of soils to HM pollution in the Don River delta and the coast of the Taganrog Bay of the Sea of Azov undergoing the great anthropogenic impact. The buffer capacity of experimental soils was carried out using the Il’in’s method (1995), based on the calculation of the inactivation ability of soils: organic matter, clay fraction (particle size < 0.01 mm), carbonates, sesquioxides, and pH. The content of HM was compared with soil Clarke and the maximum permissible concentration of HM in soils accepted in the Russian Federation. It was found that the experimental soils could be ordered by buffer capacity value as following (in decreasing order): haplic chernozem ≥ alluvial-meadow light loamy ≥ solonchak > alluvial-meadow sandy and sandy loamy > sandy primitive soil ≥ stratified alluvial soil.

Keywords: trace elements, contamination, impact territories

[1] Sparks DL. Environmental soil chemistry. 2nd edition. USA: Academic Press; 2003.

[2] Minkina TM, Fedorov YA, Nevidomskaya DG, Mandzhieva SS, Kozlova MN. Specific features of content and mobility of heavy metals in soils of floodplain of the Don River. Arid Ecosystem. 2016;6(1):70-79.

[3] Minkina TM, Fedorov YA, Nevidomskaya DG, Pol’shina TN, Mandzhieva SS, Chaplygin VA. (2017). Heavy metals in soils and plants of the Don River estuary and the Taganrog Bay Coast. Eurasian Soil Science. 2017;50(9):1033-1047.

[4] Minkina TM, Shvydkaya NV, Alekseenko VA, Nevidomskaya DG. Soils of geochemical landscapes of the lower Don River and their ecological characteristics. Rostov-onDon: Southern Federal University; 2018.

[5] Minkina TM, Nevidomskaya DG, Pol’shina TN et al. Heavy metals in the soil–plant system of the Don River estuarine region and the Taganrog Bay coast. Journal of Soils and Sediments. 2017;17(5):1474-1491.

[6] Violante A, Krishnamurti GSR, Pigna M. Factors affecting the sorption-desorption of trace elements in soil environments. Biophysico-chemical processes of heavy metals and metalloids in soil environments. Hoboken: Wiley; 2008.

[7] Vorob’eva LA. Theory and practice of chemical analysis of soils. Moscow: GEOS; 2006.

[8] Il’in VB. Evaluation of buffer capacity of soils in conditions of heavy metal pollution. Agrokhimiya. 1995;10:109–113.

[9] Vinogradov AP. Geochemistry of rare and dispersed chemical elements in solis. Moscow: Academy of Sciences of USSR; 1957.

[10] Maximum permissible concentrations (MPC) of chemical substances in soil, approved by the order of the State Committee on Natural Resources of USSR No. 02-2333 on December 10, 1990.

[11] Methodological Recommendations MU Hygienic assessment of soil quality in urban territories, Approved by the Chief Sanitary Physician of the Russian Federation. 1999.

[12] Khrustalev YP. Geochemistry of sedimentogenesis in the Sea of Azov. Apatity: Kola Scientific Center, Russian Academy of Science; 1999.

[13] Klenkin AA, Korpakova IG, Pavlenko LF, Temerdashev ZA. Ecosystem of the Sea of Azov: Anthropogenic pollution. Krasnodar: Azov Scientific Research Institute of Fisheries; 2007.

[14] World Reference Base for Soil Resources 2014. International soil classification system for naming soils and creating legends for soil maps. World Soil Resources Reports, no. 106. Rome: FAO; 214.