On Obtaining Nanomaterials from Industrial Waste

A large number of critical raw materials are heavy metals. Heavy metals can be part of industrial waste and used to produce high-quality products. For the processing of industrial waste into nanosized materials, it is proposed to use the following directions: - conversion of waste into products with different quality requirements; - regeneration of waste to restore their consumer properties; - use of waste generated as a by-product of the process to create another product with unique properties. Successful examples of processing are given: spent iron-chromium catalyst into iron oxide pigment, water treatment waste into calcium nitrate and calcium carbonate, spent aluminum-nickel catalyst into aluminum-nickel catalyst. The resulting solid products have nanosized particles, which ensured their quality indicators.