Geochemical studies of surface bottom sediments and soils of small watercourses

Evgeny M Nesterov ,Timofei Belyakov ,Stanislav Dubrova ,P I Egorov

doi:10.1051/e3sconf/202016901005

Abstract

Analytical data on samples of bottom sediments of the Novaya river watercourse made it possible to identify areas of pollution, sources of pollution and determine the nature of the influence of the anthropogenic factor on the state of the river. It was found that bottom sediments are divided into slightly polluted, moderately polluted, and dangerously polluted. Soils on the total indicator of pollution belong to the permissible category. The list of defined indicators includes: hydrogen index (pH), total metal content (cadmium, copper, lead, mercury, nickel, zinc), arsenic, petroleum products, benz(a)pyrene, ammonium nitrogen, phosphate ion, organic matter. Based on the results of the interpretation of the laboratory data, it was found that in accordance with the Regional standard, the precipitation the majority of samples are slightly polluted; at some samples, are moderately polluted; at a quarter of samples are dangerously polluted.

Highlights

Geochemical studies of surface bottom sediments were carried out on various sections of the small watercourse and included determination of the content of organic matter, phosphorus, nitrogen, macro-and microelements [2].In the course of the work, an assessment of the general chemical contamination and sanitary condition of bottom sediments was made
The quantitative chemical analysis of bottom sediments was carried out according to the certified measurement methods in the Test center of TACIS LLC
The results of the interpretation of the laboratory data showed that in accordance with the Regional standard, the precipitation samples collected at stations 9, 10, 11, 13, 14, 15, 16, are slightly polluted; 4, 5, – moderately polluted; 1, 12, 19, 20, 21 – dangerously polluted (Table 1)

Summary

Introduction

Geochemical studies of surface bottom sediments were carried out on various sections of the small watercourse (the Novaya river, Saint Petersburg) and included determination of the content of organic matter (according to the LOI), phosphorus, nitrogen, macro-and microelements [2]. The quantitative chemical analysis of bottom sediments was carried out according to the certified measurement methods in the Test center of TACIS LLC. The list of defined indicators includes: hydrogen index (pH), total metal content (cadmium, copper, lead, mercury, nickel, zinc), arsenic, petroleum products, benz(a)pyrene, ammonium nitrogen, phosphate ion, organic matter. Macroelements are those containing more than 0.01%, and microelements - from 10-6 to 0.01%. The concentrations of pollutants in non-standard bottom sediments were recalculated by their concentrations in standard bottom sediments [3,4, 6,7]

Research materials and methods

Ecochemical characteristics of bottom sediments

Methods of soil research

The results of soil research

Findings

Conclusion