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Adsorption equilibrium of zirconium based ferromagnetic adsorbent for heavy metal divalent ions (Cu2 +, Zn2 +, Cd2 +)

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Document pages: 13 pages

Abstract: Zirconium based ferromagnetic adsorbent was prepared by coprecipitating Fe2 + Fe3 + salt in zirconium solution, and its possibility as a potential adsorbent for the removal of Cu2 +, Zn2 + and Cd2 + in aqueous solution was explored. Due to the ferromagnetism of the adsorbent, the adsorbent can be easily separated from the aqueous solution under the action of an external magnetic field. The three peak distribution of the adsorbent with an average particle size of 22.74 was obtained μ m。 Hydroxyl functional groups play an important role in the effective removal of divalent ions. The surface of the adsorbent is rough and has a large number of protrusions. There are divalent ions on the surface of the adsorbent after the adsorption process. The decontamination effect of initial metal ion concentration on heavy metal ions was studiedntration and solution pH. Uptake of the heavy metal ions showed a pH-dependent profile with maximum sorption at around pH 5. The presence of the ferromagnetic sorbent in solution at different initial pH has shown a buffering effect. Equilibrium isotherms were analyzed using Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherm models. Adequacy of fit for the isotherm models based on evaluation of and ARE has revealed that heavy metal ions decontamination was fitted well with the Freundlich model.

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