Sorption of tetracycline from contaminated water using magnesium-iron layered double hydroxide alginate beads prepared from<i> Schanginia aegyptica</i> and scrap iron

This research was conducted to produce a nonconventional sorbent with the aid of Schanginia aegyptica and scrap iron solid wastes.The solutions extracted from Schanginia plant parts and scrap iron can be used effectively to prepare magnesium and iron ions, respectively.The prepared sorbent named "magnesium / iron-layered double hydroxide-sodium alginate beads (Mg/Fe-LDH-Na alginate beads)" was studied to capture tetracycline (TC) from the wastewater based on batch study.The best conditions optimized to prepare the afore-mentioned beads were Mg/Fe molar ratio = 3, initial pH 10, and Mg/Fe-LDH dosage = 5 g per 100 mL.Langmuir and pseudo-second-order model adequately describe isotherm and kinetic sorption suggesting a maximal capacity of 2.564 mg/g and there are chemical bonds between TC and alginate beads.The bead characterization tests revealed the formation of Mg/Fe-LDH nanoparticles that are responsible for TC with the presence of functional groups like hydroxyl (OH) groups.