Bentonite based nanomaterials and composites

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

Bentonite clays

▢ Rocks formed from altered volcanic ashes.

▢ Bentonite clays are rich in smectite minerals.

Applications

▢ ENVIRONMENTAL PROTECTION

• Na-enriched clays: adsorption of radioactive ions from water (Sr2+);

• Organomodified clays: adsorption of toxic metals (Pb2+, Cd2+, Ni2+), radioactive ions (TcO4

-), 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.

Environmental protection - adsorption

•Active carbons– recommended from US EPA for textile wastewater treatment. •Used two commercially active carbons: VulcanVulcan and Kemikaand Kemika

AO10 AY 99 RB 5

2.0 HDTMA-B → more efficient for adsorption acid dyes than selected active carbons!!!

Environmental protection - catalysis

▢ CWPO of tartrazine at 25 °C –the influence of Fe content

▢ CWPO of tartrazine on AlFe10 PILC – the influence of temperature

Electrochemical sensors

▢ phenol oxidation▢ toluene oxidation ▢ tartrazine reduction▢ nitrite ions oxidation

Commercial geotextile composite

Synthesized geotextile composite

Sampleδ

mm

mA

g m-2

max , kN m-1 Rotating test tube

md cmd χ, %

Commercial 7 5500 20 11 70

Synthesized 3 600 19 11 5

Thank you for your attention