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Publication
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| Research Title |
Adsorption of Functionalized Thiol-Graphene Oxide for the Removal of Mercury from Aqueous Solution |
| Date of Distribution |
28 November 2014 |
| Conference |
| Title of the Conference |
The 8th International Conference on Multi-functional Materials and Applications (ICMMA 2014) |
| Organiser |
Hoseo University, Chungnam, Korea |
| Conference Place |
Hoseo University |
| Province/State |
Chungnam, Korea |
| Conference Date |
27 November 2014 |
| To |
29 November 2014 |
| Proceeding Paper |
| Volume |
- |
| Issue |
- |
| Page |
- |
| Editors/edition/publisher |
Prof. Heon Chang Kim (Hoseo University, Korea) |
| Abstract |
Graphene oxide (GO) was optimally produced from graphite as a starting material and was subject to functionalize with 3-mercaptopropyl-trimethoxysilane (MPTMS) to acquire thiol group (-SH) as a selective carbon-based adsorbent for the removal of mercury from aqueous solution comparing with its bare graphite (BGP). The GO-SH was characterized by Fourier transform infrared spectroscopy and energy dispersive X-ray spectroscopy (EDX). IR characteristic peaks appear at wave numbers of 3367(O-H), 2576 (S-H), 1719 (C=O), 1224 and 1049 (C-O), and 1160 (Si-O-C) indicating the thiol group attached. Also, EDX spectrum revealing both Si and S peaks confirms the MPTMS bound on the GO surface. For an optimal adsorption study, the effects of pH solution, contact time and initial concentration of Hg(II) were investigated in details in association with determination of Hg(II) by HGAAS. From the results, the adsorption capacity of the functionalized GO-SH for Hg(II) was 80.65 mg/g at pH 6.6, about 3 times higher than that of its BGP (22.94 mg/g). The adsorption isotherm of the GO-SH for Hg(II) was found only fitting well with Langmuir model, while that of BGP followed the Freundlich one. It is implied that graphene oxide modified with thiol can be used as a high potential adsorbent for such toxic metals.
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| Peer Review Status |
มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Journal Publication
ไทย