Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/74890
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dc.contributor.author | Yu, Y. | - |
dc.contributor.author | Addai-Mensah, J. | - |
dc.contributor.author | Losic, D. | - |
dc.date.issued | 2012 | - |
dc.identifier.citation | Science and Technology of Advanced Materials, 2012; 13(1):015008-1-015008-11 | - |
dc.identifier.issn | 1468-6996 | - |
dc.identifier.issn | 1878-5514 | - |
dc.identifier.uri | http://hdl.handle.net/2440/74890 | - |
dc.description.abstract | Diatom silica microparticles were chemically modified with self-assembled monolayers of 3-mercaptopropyl-trimethoxysilane (MPTMS), 3-aminopropyl-trimethoxysilane (APTES) and n-(2-aminoethyl)-3-aminopropyl-trimethoxysilane (AEAPTMS), and their application for the adsorption of mercury ions (Hg(II)) is demonstrated. Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy analyses revealed that the functional groups (–SH or –NH2) were successfully grafted onto the diatom silica surface. The kinetics and efficiency of Hg(II) adsorption were markedly improved by the chemical functionalization of diatom microparticles. The relationship among the type of functional groups, pH and adsorption efficiency of mercury ions was established. The Hg(II) adsorption reached equilibrium within 60 min with maximum adsorption capacities of 185.2, 131.7 and 169.5 mg g-1 for particles functionalized with MPTMS, APTES and AEAPTMS, respectively. The adsorption behavior followed a pseudo-second-order reaction model and Langmuirian isotherm. These results show that mercapto- or amino-functionalized diatom microparticles are promising natural, cost-effective and environmentally benign adsorbents suitable for the removal of mercury ions from aqueous solutions. | - |
dc.description.statementofresponsibility | Yang Yu, Jonas Addai-Mensah and Dusan Losic | - |
dc.language.iso | en | - |
dc.publisher | Institute of Physics Publishing Ltd | - |
dc.rights | © 2012 National Institute for Materials Science | - |
dc.source.uri | http://dx.doi.org/10.1088/1468-6996/13/1/015008 | - |
dc.subject | Diatoms | - |
dc.subject | diatom silica | - |
dc.subject | organosilane modifications | - |
dc.subject | 3-mercaptopropyl-trimethoxysilane (MPTMS) | - |
dc.subject | mercury adsorption | - |
dc.title | Functionalized diatom silica microparticles for removal of mercury ions | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1088/1468-6996/13/1/015008 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Losic, D. [0000-0002-1930-072X] | - |
Appears in Collections: | Aurora harvest 4 Chemical Engineering publications |
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hdl_74890.pdf | Published version | 898.53 kB | Adobe PDF | View/Open |
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