English
Русский 32-40 p.
Objectives: the purpose of the study is to determine the content of organic matter in anthropogenic soils using thermal analysis methods.
Methods. Physico-chemical methods of soil sample analysis were used, the actual acidity, ash content and or-ganic matter were determined according to GOST 26213-2021 and by thermogravimetric analysis.
Results. It is shown that the content of organic substances in soils by thermogravimetry and according to GOST 26213-2021 differ by no more than 15.4%, which, in particular, may be due to the decomposition of inorganic sub-stances during prolonged exposure at a temperature of 525 ° C according to the GOST method. Nevertheless, the thermogravimetry method provides information about the temperatures at which the maximum decomposition rate is observed.
Conclusions. It has been established that the methods of thermogravimetry and according to GOST 26213-2021 give different results of the content of organic carbon in the soil due to different temperatures of maximum decom-position of humic acids. The higher the maximum decomposition temperature, the less organic substances decom-pose when studying soils by thermogravimetry.
Methods. Physico-chemical methods of soil sample analysis were used, the actual acidity, ash content and or-ganic matter were determined according to GOST 26213-2021 and by thermogravimetric analysis.
Results. It is shown that the content of organic substances in soils by thermogravimetry and according to GOST 26213-2021 differ by no more than 15.4%, which, in particular, may be due to the decomposition of inorganic sub-stances during prolonged exposure at a temperature of 525 ° C according to the GOST method. Nevertheless, the thermogravimetry method provides information about the temperatures at which the maximum decomposition rate is observed.
Conclusions. It has been established that the methods of thermogravimetry and according to GOST 26213-2021 give different results of the content of organic carbon in the soil due to different temperatures of maximum decom-position of humic acids. The higher the maximum decomposition temperature, the less organic substances decom-pose when studying soils by thermogravimetry.
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3. Ivanenko N.V., Golov V.I., Kadono A. Ecological state and use of land resources in the Russian Far East. Territory of New Opportunities. 2016. No. 4. P. 166 – 175.
4. Sorokin A.E., Savich V.I., Mosina L.V. Features of the content of heavy metals in urban soils. Fertility. 2020. No. 4. P. 60 – 63.
5. Borodina N.A. Technogenic pollution of urbanized soils of the Amur region with heavy metals. Bulletin of the Far Eastern Branch of the Russian Academy of Sciences. 2018. No. 2 (198).
6. Fedorova N.N., Romanov O.V. The influence of organic substances on the aggregate state of soil. Biological Communications. 2006. No. 1. P. 148 – 155.
7. Vodyanitsky Yu.N. Organic matter in urban soils (literature review). Soil science. 2015. No. 8. P. 921 – 931
8. Bolatov A.A., Chernikov V.A., Lukin S.M. Derivatographic method for studying the humus state of sod-podzolic sandy loam soils. Agrochemical Bulletin. 2010. No. 3. P. 38 – 40.
9. Suksin N.E., Petrov V.G., Shumilova M.A. Thermal studies of soils characteristic of Udmurtia. Chemical physics and mesoscopy. 2021. No. 1. P. 111 – 116.
10. Kogan R.M., Kalmanova V.B. Soil acidity as an indicator of the ecological state of an urban area (using the example of Birobidzhan). Regional problems. 2008. No. 10. P. 83 – 86.
11. Drozdova N.I., Zhuchenko Yu.M., Makarenko T.V., Shumilin V.A. Features of the fractional composition of soil organic matter and the accumulation of heavy metals by plants in the industrial zone of Gomel. Problems of health and ecology. 2014. No. 1 (39).
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13. Marchik T.P., Efremov A.L. Soil science with basics of crop production. Grodno: Grodno State University named after Yanka Kupala, 2006. 249 p.
14. Belopukhov S.L., Starykh S.E., Kupriyanov A.N., Grigorieva M.V. Study of the qualitative composition of humic acids in soddy-podzolic soil using the method of thermal analysis. Prirodo-obstroistvo. 2020. No. 3. P. 36 – 45.
Chagarova O.V., Milinsky A.Yu., Kositsyna O.A. Application of thermal methods for the analysis of organic matter content in urbanozems. Chemical Bulletin. 2024. 7 (1). P. 32 – 40. https://doi.org/10.58224/2619-0575-2024-7-1-32-40