Recent Progress of Layered Double Hydroxide-Based Materials in Wastewater Treatment

Abstract

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.

A new method for the preparation of MgAl layered double hydroxide-copper metal–organic frameworks structures: application to electrocatalytic oxidation of formaldehyde

“…Figure 2 B shows the SEM image of the Cu-(PTA) MOFs/MgAl-LDH with a distribution of uniforms microcrystals of Cu-(PTA) MOFs/MgAl-LDH composition. It seems that hydroxide groups existence interlayer of LDH, regulated formation of Cu-(PTA) MOFs particles through mechanism-oriented growth on MgAl-(PTA) LDH surface 58 , 59 . Furthermore, the spectra related to elemental analysis (EDX) of MgAl-(PTA) LDH and Cu-(PTA) MOFs/MgAl-LDH are also shown in Fig.…”

Development and Modification of New or Recycled Materials and Technological Processes towards Sustainable Development

“…The five review papers address promising issues in various scientific fields. Fu et al [1] describe advances in the development of layered double hydroxide-based materials for wastewater treatment applications. Takacova et al [2] provide an overview of the current state of the field in spent portable lithium battery recycling at both the research and industrial scales.…”