The role of diatomite as a detoxifying agent in soil contamination with copper

Alevtina Kulikova,Vitaly Isaichev,Andrey Kozlov,Olga Tsapovskaya,V Kankhva

doi:10.1051/e3sconf/202125808023

Alevtina Kulikova, Vitaly Isaichev + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202125808023

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Abstract

The article presents the results of studying the toxic levels of mobile copper in typical chernozem by doing model field experiments with artificial soil contamination with copper sulfate at a level of 2 MPC Cu, 4 MPC Cu and 10 MPC Cu. It was shown that this increased the content of mobile copper from 1.4 (2 MPC Cu) to 2.0 times (10 MPC Cu) when copper was extracted from the soil, respectively, with an acetate-ammonium buffer solution of pH 4.8 and 1n HCl solution. The latter was accompanied by the loss of almost a third of the spring wheat yield (29%) and an increase in the entry of the element into produce (grain). The application of diatomite to the soil (dose 5 t / ha) as a detoxifying agent contributed to a decrease in the level of copper in the spring wheat produce by 8 (2 MPC Cu) and 35 (10 MPC Cu)%.

Highlights

Due to a significant intensification of anthropogenic impact on the environment, there is an accelerated build-up of the content of heavy metals in soils, which are usually classified as elements with atomic masses of more than 50 at. units [1]
It is extremely important to assess the levels of this element in soils, the degree of its mobility and toxicity, to develop agrotechnical methods that help reduce the content of heavy metals, in particular copper, in crop produce
Copper contamination even at the level of 2 maximum permissible concentration (MPC) Cu can lead to the yield loss, and with a higher content of its mobile forms - almost the loss of a third of the yield

Summary

Introduction

Due to a significant intensification of anthropogenic impact on the environment, there is an accelerated build-up of the content of heavy metals in soils, which are usually classified as elements with atomic masses of more than 50 at. units [1]. Many of them in ultra micro and micro amounts are necessary for the normal growth and development of plants, since they are part of various enzymes and actively participate in metabolic processes. If they are present in excessive concentrations in the environment, including soil, they can have a strong toxic effect. The participation of copper in the protective function of the plant organism is widely known. It is extremely important to assess the levels of this element in soils, the degree of its mobility and toxicity, to develop agrotechnical methods that help reduce the content of heavy metals, in particular copper, in crop produce. The foregoing determined the goal of our study - to establish the levels of mobile copper in typical chernozem, leading to produce contamination and the role of diatomite (high-silica rock) as a detoxifying agent

Objects and methods of research

Results and their discussion

MPC Cu

Conclusions