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- W4295066651 abstract "Mercury thrown even at low concentrations in water resources causes a severe threat to the ecosystem hence the presented work describes a low-cost and environmentally friendly clean-up platform for decontamination of water in terms of mercury ions. For this purpose, MgFe2O4—Gum Arabic composite was prepared with a simple ultrasound-assisted precipitation route and further modified with l-Cysteine as a thiol resource to improve its adsorption characteristic. The structure of the biosorbent was characterized by XRD, FESEM, VSM, EDX, and BET techniques. Effective parameters on mercury adsorption were optimized with response surface methodology using Box–Behnken design. The maximum removal efficiency was obtained at pH of 5, contact time of 15 min and adsorbent dosage of 19 mg by magnetic GA. After thiol functionalization, optimum variables changed to pH of 2, time of 15 min and dosage of 5 mg. Isotherm study indicated that mercury biosorption onto the magnetic Gum Arabic and thiol immobilized sorbent followed Langmuir and Freundlich model with adsorption capacity of 96 mg g−1 and 250 mg g−1, respectively. Results of the kinetic study revealed that mercury adsorption followed a pseudo-second order model. To study the ability of biosorbent as a reusable compound a mixture of HCl (0.5 M) and thiourea (2%) was employed to release the adsorbed ions from the sorbent surface moreover, it showed 90% removal efficiency after three cycles of sorption and desorption which confirmed the presented composite is a reusable biosorbent." @default.
- W4295066651 created "2022-09-10" @default.
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- W4295066651 date "2022-09-09" @default.
- W4295066651 modified "2023-10-16" @default.
- W4295066651 title "Water decontamination in terms of Hg(II) over thiol immobilized magnesium ferrite: Gum Arabic biosorbent—response surface optimization, kinetic, isotherm and comparing study" @default.
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- W4295066651 doi "https://doi.org/10.1007/s00289-022-04453-2" @default.
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