1,1-Dimethylbiguanide-Functionalized Magnetic Mesoporous Silica for Magnetic Removal of Cu2+ from water

Author: M. Beygzadeh

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Abstract

A 1,1-Dimethylbiguanide-functionalized magnetic mesoporous silica material (called Fe3O4/mSiO2-Met), was synthesized and determining its efficiency in copper removal from aqueous solutions with the study the effect of pH, contact time, initial concentration of Cu (II) ions and adsorbent dosage in a batch system was investigated. The materials were characterized by X-ray diffraction, TEM, Fe-SEM, N2 adsorption-desorption (BET and BJH), VSM, and FT-IR. The experimental data were analyzed using the Langmuir and Freundlich models of adsorption. The results showed that the adsorption of Cu ions by adsorbent were suitable for Freundlich adsorption isotherm. Adsorbent could be efficiently separated by an external magnetic field from the reaction medium. Furthermore, results showed that adsorbent could be regenerated using HNO3 1 M and used for 4 sequential cycles of adsorption/desorption experiments, without significant loss of removal efficiency.

Keywords

Adsorption, Magnetic mesoporous silica, Biguanide, Copper removal, Freundlich isotherm

Conclusion

In this study, a novel biguanide-functionalized mesoporous Fe3O4/mSiO2-Met nanoparticle was prepared for the adsorptive removal of Cu(II) from aqueous solutions. The equilibrium data of adsorption demonstrated good compatibility with Freundlich model. Furthermore, the magnetic adsorbent has large pore volume, superparamagnetism and active adsorptive sites that can be regenerated by simple washing with acid solution and separated from the reaction medium by the external magnetic field.

References

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How to cite this article

M. Beygzadeh (2016) . 1,1-Dimethylbiguanide-Functionalized Magnetic Mesoporous Silica for Magnetic Removal of Cu2+ from water , Biological Forum – An International Journal 8(1): 493-499.