Functionalized diatom silica microparticles for removal of mercury ions
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)) i...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2012-01-01
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| Series: | Science and Technology of Advanced Materials |
| Online Access: | http://iopscience.iop.org/1468-6996/13/1/015008 |
| _version_ | 1811321676440272896 |
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| author | Yang Yu, Jonas Addai-Mensah and Dusan Losic |
| author_facet | Yang Yu, Jonas Addai-Mensah and Dusan Losic |
| author_sort | Yang Yu, Jonas Addai-Mensah and Dusan Losic |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T13:21:54Z |
| format | Article |
| id | doaj.art-8f3b870fb196491895e66437a767b26e |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-04-13T13:21:54Z |
| publishDate | 2012-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-8f3b870fb196491895e66437a767b26e2022-12-22T02:45:17ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142012-01-01131015008Functionalized diatom silica microparticles for removal of mercury ionsYang Yu, Jonas Addai-Mensah and Dusan LosicDiatom 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.http://iopscience.iop.org/1468-6996/13/1/015008 |
| spellingShingle | Yang Yu, Jonas Addai-Mensah and Dusan Losic Functionalized diatom silica microparticles for removal of mercury ions Science and Technology of Advanced Materials |
| title | Functionalized diatom silica microparticles for removal of mercury ions |
| title_full | Functionalized diatom silica microparticles for removal of mercury ions |
| title_fullStr | Functionalized diatom silica microparticles for removal of mercury ions |
| title_full_unstemmed | Functionalized diatom silica microparticles for removal of mercury ions |
| title_short | Functionalized diatom silica microparticles for removal of mercury ions |
| title_sort | functionalized diatom silica microparticles for removal of mercury ions |
| url | http://iopscience.iop.org/1468-6996/13/1/015008 |
| work_keys_str_mv | AT yangyujonasaddaimensahanddusanlosic functionalizeddiatomsilicamicroparticlesforremovalofmercuryions |