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Recent Progress of Layered Double Hydroxide-Based Materials in Wastewater Treatment
Summary
This review examines the use of layered double hydroxides (LDHs) as catalysts and adsorbents for wastewater treatment. Researchers found that LDH-based materials can effectively remove heavy metal ions, organic pollutants, and oil contaminants from wastewater due to their high anion exchange capacity, thermal stability, and large surface area.
Layered double hydroxides (LDHs) can be used as catalysts and adsorbents due to their high stability, safety, and reusability. The preparation of modified LDHs mainly includes coprecipitation, hydrothermal, ion exchange, calcination recovery, and sol-gel methods. LDH-based materials have high anion exchange capacity, good thermal stability, and a large specific surface area, which can effectively adsorb and remove heavy metal ions, inorganic anions, organic pollutants, and oil pollutants from wastewater. Additionally, they are heterogeneous catalysts and have excellent catalytic effect in the Fenton system, persulfate-based advanced oxidation processes, and electrocatalytic system. This review ends with a discussion of the challenges and future trends of the application of LDHs in wastewater treatment.
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