1. Bentonite based nanomaterials and composites Aleksandra Milutinović-Nikolić, Ph.D., Full Research Professor Zorica Mojović, Ph.D., Associate Research Professor Predrag Banković, Ph.D., Associate Research Professor Nataša Jović-Jovičić, Ph.D., Assistant Research Professor Marija Žunić, master, Research Assistant Dušan Jovanović, Ph.D., Full Research Professor Institute of Chemistry, Technology and Metallurgy Center for Catalysis and Chemical Engineering

2. Bentonite clays ▢ Rocks formed from altered volcanic ashes. ▢ Bentonite clays are rich in smectite minerals.

3. Applications ▢ ENVIRONMENTAL PROTECTION Na-enriched clays: adsorption of radioactive ions from water (Sr 2+ ); Organomodified clays: adsorption of toxic metals (Pb 2+, Cd 2+, Ni 2+ ), radioactive ions (TcO 4 - ), azo dyes; simultaneous adsorption of organic and inorganic pollutants Pillared clays: catalytic degradation of phenol, toluene, and azo dyes; ▢ ELECTROCHEMICAL SENSORS Organomodified and pillared clays: toluene, phenol detection. ▢ GEOTEXTILE COMPOSITE Geosynthetic clay liners. ▢ POROUS NANOCOMPOSITES ▢ ENZYMES IMMOBILIZATION Na-enriched, organomodified and pillared clays: invertaze immobilization.

4. Environmental protection - adsorption Active carbons– recommended from US EPA for textile wastewater treatment. Vulcan and Kemika Used two commercially active carbons: Vulcan and Kemika AO10AY 99RB 5 2.0 HDTMA-B → more efficient for adsorption acid dyes than selected active carbons!!!

5. Environmental protection - catalysis ▢ CWPO of tartrazine at 25 °C – the influence of Fe content ▢ CWPO of tartrazine on AlFe10 PILC – the influence of temperature

6. Electrochemical sensors ▢ phenol oxidation ▢ toluene oxidation ▢ tartrazine reduction ▢ nitrite ions oxidation

7. Commercial geotextile composite

8. Synthesized geotextile composite Sample δ mm m A g m -2  max, kN m -1 Rotating test tube mdcmdχ, % Commercial75500201170 Synthesized360019115

9. Thank you for your attention Thank you for your attention