**4. Conclusions**

Sorption materials on the base of montmorillonite (organoclays, pillared clays, claysupported zero-valent iron) were used for the removal of inorganic pollutants uranium (VI) and chromium (VI) from contaminated water. A significant increase in the sorption characteristics of the synthesized materials was shown. The obtained sorbents can be widely used in water purification technologies and modern environmental protection technologies. It is advisable to carry out organophilization of clays when underground reaction barriers are created in the soil along the path of movement of polluted waters. The use of pillared clays is effective for the deep cleaning of small volumes of water from heavy metals and radionuclides. Sorbents based on zero-valent iron and clay minerals can be widely used both in the mode of water purification on underground permeated reactive barriers and on traditional sorption technological equipment.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The author declares no conflict of interest.
