REMOVAL OF HG (I) AND HG (II) IONS FROM AQUEOUS SOLUTIONS, USING TIO2 NANOPARTICLES

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AFSHAR E.; MOHAMMADI MANESH H.; DASHTI KHAVIDAKI H.

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ISSN: 2588-4824

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Journal: POLLUTION Year:2017 | Volume:3 | Issue:3 Page(s): 505-516

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Title

REMOVAL OF HG (I) AND HG (II) IONS FROM AQUEOUS SOLUTIONS, USING TIO2 NANOPARTICLES

Author(s)

AFSHAR E. | MOHAMMADI MANESH H. | DASHTI KHAVIDAKI H. | Issue Writer Certificate

Keywords

ADSORPTION

ADSORPTION ISOTHERMS

HEAVY METALS

MAXIMUM ADSORPTION CAPACITY

NANO-ADSORBENTS

Abstract

For the first time, the present study removes ions of mercury, in the form of Hg (I) and Hg (II) ions, from aqueous solutions by adsorbing them onto titanium dioxide nanoparticles. The effects of various parameters, such as solution's initial pH, temperature, sorbent dosage, initial mercury concentration, and contact time have been examined on the ADSORPTION process. The experimental results have been compared with Langmuir, Freundlich, and Temkin ADSORPTION isotherms. The maximum ADSORPTION, obtained for Hg (I) and Hg (II) ions, have been 97.5% and 98.6%, respectively. Also, it has been shown that the Langmuir isotherm has better fitting with the equilibrium data than the Freundlich and Temkin isotherms. Thermodynamic parameters of the ADSORPTION, such as DH0 and DS0 have been calculated, the negative values of which show that the mercury ions ADSORPTION is an exothermic process and that randomness is decreased, respectively. The study of ADSORPTION kinetics shows that the ADSORPTION of Hg (I) and (II) ions with TiO2 nanoparticles is pseudo-second order.

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APA: Copy

AFSHAR, E., MOHAMMADI MANESH, H., & DASHTI KHAVIDAKI, H.. (2017). REMOVAL OF HG (I) AND HG (II) IONS FROM AQUEOUS SOLUTIONS, USING TIO₂ NANOPARTICLES. POLLUTION, 3(3), 505-516. SID. https://sid.ir/paper/348639/en

Vancouver: Copy

AFSHAR E., MOHAMMADI MANESH H., DASHTI KHAVIDAKI H.. REMOVAL OF HG (I) AND HG (II) IONS FROM AQUEOUS SOLUTIONS, USING TIO₂ NANOPARTICLES. POLLUTION[Internet]. 2017;3(3):505-516. Available from: https://sid.ir/paper/348639/en

IEEE: Copy

E. AFSHAR, H. MOHAMMADI MANESH, and H. DASHTI KHAVIDAKI, “REMOVAL OF HG (I) AND HG (II) IONS FROM AQUEOUS SOLUTIONS, USING TIO₂ NANOPARTICLES,” POLLUTION, vol. 3, no. 3, pp. 505–516, 2017, [Online]. Available: https://sid.ir/paper/348639/en

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