Geomaterials: their application to environmental remediation

Area of Science:

• Geochemistry and Materials Science: Focuses on Earth-inspired materials for environmental applications.

Background:

• Geomaterials, derived from Earth's geological history, offer unique properties for environmental solutions.
• Key classes reviewed include smectites, layered double hydroxides (LDHs), and zeolites.

Approach:

• This review details the properties and applications of three major geomaterial classes.
• Highlights their roles in pollutant removal, catalysis, and immobilization of contaminants.

Key Points:

• Smectites possess cation-exchange capacity, useful for pollutant removal and nanocomposites.
• Layered double hydroxides (LDHs) exhibit anion-exchange capacity, applied in catalysis and halogen scavenging.
• Zeolites, microporous materials, excel at removing harmful cations and forming composites for ion absorption and radioactive iodine immobilization.

Conclusions:

• Geomaterials are indispensable tools for effective environmental remediation.
• Their diverse functionalities address critical environmental challenges, from water purification to radioactive waste management.