One of the strongest and most common chemical contamination is heavy metal contamination. Heavy metals accumulate in the soil, especially in the upper humus horizons, and are slowly removed during leaching, consumption by plants, erosion and deflation - soil blowing.
In connection with the intensification of environmental pollution, due to the increase in the technogenic load on the soil, the question of the sanitary, phytoremediation role of agricultural plants is especially acute. Among the various methods used, phytoremediation is one of the most inexpensive, safe, innovative and effective tools for recovering heavy metals from soil.
The efficiency of phytoremediation can be increased by introducing various components that stimulate plant growth and development. Several of these components have been identified in various articles. Iron chelate increases the absorption of micro and macro elements by plants. Diatomaceous earth powder improves the physical structure of the soil, enhances the movement of water in the root system. Potassium humate reduces the oppression of plants by heavy metals, accelerates growth and development due to humic acids. Disubstituted potassium hydroxyethylene diphosphonic acid (K2HEDP) was also used.
In the work, an experiment was set up in which the named chemical additives were combined and their different concentrations were used. The experiment was carried out using Sarepta mustard, which is a plant that accumulates heavy metals.
As a result of the experiment, some dependences of the growth, state of plants and the amount of accumulated metals on chemical additives were obtained. The best result was shown by K2HEDP 10 mmol / L, which was able to increase the ability of Sarepta mustard to accumulate heavy metals (Ni, Cu, Zn, Co, Cr) in the ground part of the plant.
|Affiliation of speaker||D. Mendeleev University of Chemical technology of Russia|
|Publication||IOP Conference Series: Earth and Environmental Science|
|Position of speaker||bachalor|