VSC Sorption onto Mg-Fe-F Layered Double Hydroxide and its Fluoride Release in Aqueous Solution

Yoshiyuki Yokogawa; Shota Namba; Junichiro Kinoshita; Yuki Morita; Kazuo Fujii; Masato Hotta; Yutaka Doi

doi:10.4028/www.scientific.net/KEM.720.37

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 720VSC Sorption onto Mg-Fe-F Layered Double Hydroxide...

VSC Sorption onto Mg-Fe-F Layered Double Hydroxide and its Fluoride Release in Aqueous Solution

Abstract:

Etiology of halitosis is often concerned with gram-negative anaerobic bacteria, which produce the malodorous compounds such as volatile sulfur compounds (VSC), hydrogen sulfide and methyl mercaptan. The absorbents for the malodorous compounds are expected to prevent the teeth from decaying and peiodontics disease. The VSC adsorption capabilities of layered double hydroxides, of which composition is A_1-xB_x(OH)₂C_x/n·mH₂O, where A and B are Mg and Fe ions, and C are carbonate (CO₃^2- : MgFe LDH CO₃) and fluorine (F ^- : MgFe LDH F) ions in aqueous medium was studied by GC/FPD. The concentration of H₂S rapidly decreased for first 1 hours of soaking in H₂S water and fell to 0% in 4-5 h when MgFe LDH CO₃ was applied. MgFe LDH F was used, then the H₂S concentration was quickly decreased the same as MgFe LDH CO₃, and 8 mg/l of fluorine was released at a time. The iron ion was not detected in the H₂S water after soaking for 18 hours. The MgFe LDHF are expected to be likely adsorbent for the fast removal of VSC from the mouth and fluorine releasing agent.

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Periodical:

Key Engineering Materials (Volume 720)

Pages:

37-40

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.720.37

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Online since:

November 2016

Authors:

Yoshiyuki Yokogawa, Shota Namba, Junichiro Kinoshita, Yuki Morita, Kazuo Fujii, Masato Hotta, Yutaka Doi

Keywords:

Adsorption, Fluorine, GC, Hydrotalcite, Iron, VSC

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