Water decontamination in terms of Hg(II) over thiol immobilized magnesium ferrite: Gum Arabic biosorbent—response surface optimization, kinetic, isotherm and comparing study

Mercury thrown even at low concentrations in water resources causes a severe threat to the ecosystem hence presented work describes low-cost and environmentally friendly clean-up platform for decontamination of terms mercury ions. For this purpose, MgFe2O4—Gum Arabic composite was prepared with simple ultrasound-assisted precipitation route further modified l-Cysteine as thiol resource improve its adsorption characteristic. The structure biosorbent characterized by XRD, FESEM, VSM, EDX, BET techniques. Effective parameters on were optimized response surface methodology using Box–Behnken design. maximum removal efficiency obtained pH 5, contact time 15 min adsorbent dosage 19 mg magnetic GA. After functionalization, optimum variables changed 2, 5 mg. Isotherm study indicated that biosorption onto Gum immobilized sorbent followed Langmuir Freundlich model capacity 96 g−1 250 g−1, respectively. Results kinetic revealed pseudo-second order model. To ability reusable compound mixture HCl (0.5 M) thiourea (2%) employed release adsorbed ions from moreover, it showed 90% after three cycles sorption desorption which confirmed is biosorbent.