Adsorption Equilibrium for Heavy Metal Divalent Ions (Cu2+, Zn2+, and Cd2+) into Zirconium-Based Ferromagnetic Sorbent
| Autor: | Mohammad Omar Abdullah, Agnes Yung Weng Lee, Soh Fong Lim, S. N. David Chua, Khairuddin Sanaullah, R. Baini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Zirconium
Langmuir Sorbent Aqueous solution Materials science Article Subject Coprecipitation Metal ions in aqueous solution Inorganic chemistry General Engineering chemistry.chemical_element Sorption 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences chemistry lcsh:TA401-492 General Materials Science Freundlich equation lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology 0105 earth and related environmental sciences |
| Zdroj: | Advances in Materials Science and Engineering, Vol 2017 (2017) |
| ISSN: | 1687-8434 |
| DOI: | 10.1155/2017/1210673 |
| Popis: | Zirconium-based ferromagnetic sorbent was fabricated by coprecipitation of Fe2+/Fe3+ salts in a zirconium solution and explored as a potential sorbent for removing the Cu2+, Zn2+, and Cd2+ from aqueous solution. The sorbent could easily be separated from aqueous solution under the influence of external magnetic field due to the ferromagnetism property. A trimodal distribution was obtained for the sorbent with average particle size of 22.74 μm. The –OH functional groups played an important role for efficient removal of divalent ions. The surface of the sorbent was rough with abundant protuberance while the existence of divalent ions on the sorbent surface after the sorption process was demonstrated. Decontamination of the heavy metal ions was studied as a function of initial metal ions concentration 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 R2 and ARE has revealed that heavy metal ions decontamination was fitted well with the Freundlich model. |
| Databáze: | OpenAIRE |
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