Composites of Layered Double Hydroxides and ANA-Type Zeolite Synthesized from Hazardous Secondary Aluminum Dross for Cationic Dye Wastewater Treatment

This work first transformed hazardous aluminum waste into low-cost MgAl−layered double hydroxide@ANA zeolite (LDHs@ANA) composite for dye wastewater adsorption, which was meaningful recovery and pollution control. Based on this strategy, the Al(OH)3 extracted from secondary dross (a in industry) used as an source to synthesize LDHs@ANA composite, had more excellent adsorption capacity methylene blue than MgAl−LDHs ANA alone. The consisted of spherical particles uniformly covered with LDH nanosheets, effectively avoided a large amount aggregation between nanosheets increased specific surface areas pore volumes. kinetic results indicated that process conformed pseudo-second-order model, site main factor affecting process. equilibrium studies showed exothermic, Langmuir model best fitted process, maximum reaching 65.27 mg/g. Meanwhile, effects pH, adsorbent concentration, initial time were analyzed. Overall, provides fresh concept preparation adsorbents waste.