Recent progress in layered double hydroxides (LDH)-containing hybrids as adsorbents for water remediation

Layered double hydroxides and particularly LDH-containing hybrids are emerging as potential nano-sized adsorbents for water treatment. Recent studies have demonstrated LDH-containing hybrids as promising multifunctional materials for potential utilization in various applications such as, photo-catalysis, energy storage, nanocomposites and water purification.

This article reviews the recent applications of LDH-containing hybrids as adsorbents for waterremediation. The maximum adsorption capacities of various toxic heavy metals and dyes on different LDH hybrids were reported as 483 mg/g for Pb2+, 95 mg/g for Cd2+, 181 mg/g for Cu2+, 649 mg/g for Cr6+, 180 mg/g As5+, 813 mg/g for Hg2+, 450 for Ag+, 277 mg/g for U6+, 1062 mg/g for methyl orange, 185 mg/g for methylene blue, and 1250 mg/g for Congo red, which is comparatively higher than other commercial adsorbents.