Authors: Rahmatov Muhamadi Nuridinovich - Candidate of Physical-Mathematical Sciences, Senior Lecturer, Department of General Physics and Solid Body, Khujand State University named after academician B. Gafurov, (Republic of Tajikistan, Khujand), Nurmatov Davlatjon Khamralievich – Рh.D–Doctoral Student of the 1st year of the Faculty of Physics and Techniques under KhSU named after academician B. Gafurov, (Republic of Tajikistan, Khujand), Abdullaev Sabur Fuzailovich - Dr. Sc.(Phys.Math),  Laboratory of Atmospheric Physics, S. U. Umarov Physicol-Technical Institute named after Academy of Sciences of the Republic of Tajikistan (LAP PhTI AS RT Dushanbe)

JOURNAL NUMBER: 2(65). YEAR OF ISSUE: 2023. LANGUAGE OF THE ARTICLE: Russian

ANNOTATION

This article discusses one of the most important problems - pollution of the natural environment with heavy metals. Studies have established that the highest level strontium (110.60 ppm) was registered in sample No. 3 near the Sardob deposit. The background concentration of strontium in soils is 94.85 ppm. As a result of the study, it was found that the distribution of Pb in the soil of the village of Zarnisor is uneven. The average content of Pb in soils does not exceed the maximum allowable concentrations and is almost the same. In the studied soils, an excess of the MPC for the studied elements was revealed, only in samples No. 3 collected near Sardoba it is 4.21 times. Analysis of the obtained data revealed that the Pb values in the soil vary from 135 ppm to 1.41 ppm, with an average value of 34.99 ppm. The results of elemental analysis of the zinc content in the soils of the studied areas showed an excess of its MPC by 2.3 times at point No. 1, 7.6 times at point No. 3, 4 times at point No. 9, 2 times at points No. 18 and No. 25. On average, the content of zinc in all samples studied almost does not exceed the MPC value. The high content of zinc in the soils of the mentioned points, apparently, is associated with the impact on their environment of the development of mineral deposits. Analysis of data on the content of copper, nickel and cobalt in the soils of the studied points showed the absence of increased maximum allowable norms of these metals at all points. Possible sources of HM pollution are discussed, which are mainly anthropogenic and natural.

KEY WORDS

environmental pollution, heavy metals, clarke, maximum allowable concentration,  geochemical pollution index. elemental analysis.

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