Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II)
A new composite absorbent with multifunctional and environmental-friendly structures was prepared using chitosan, diatomite and polyvinyl alcohol as the raw materials, and glutaraldehyde as a cross-linking agent. The structure and morphology of the composite absorbent, and its adsorption properties...
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| Format: | Article |
| Language: | English |
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The Royal Society
2017-01-01
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| Series: | Royal Society Open Science |
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| Online Access: | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170829 |
| _version_ | 1818528960896565248 |
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| author | Yong Fu Xiaoxu Xu Yue Huang Jianshe Hu Qifan Chen Yaoqing Wu |
| author_facet | Yong Fu Xiaoxu Xu Yue Huang Jianshe Hu Qifan Chen Yaoqing Wu |
| author_sort | Yong Fu |
| collection | DOAJ |
| description | A new composite absorbent with multifunctional and environmental-friendly structures was prepared using chitosan, diatomite and polyvinyl alcohol as the raw materials, and glutaraldehyde as a cross-linking agent. The structure and morphology of the composite absorbent, and its adsorption properties of Hg(II) in water were characterized with Fourier transform infrared (FT-IR) spectra, scanning electron microscope (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET) measurements and ultraviolet–visible (UV–Vis) spectra. The effect of the pH value and contact time on the removal rate and absorbance of Hg(II) was discussed. The adsorption kinetic model and static adsorption isotherm and regeneration of the obtained composite absorbent were investigated. The results indicated that the removal of Hg(II) on the composite absorbent followed a rapid adsorption for 50 min, and was close to the adsorption saturation after 1 h, which is in accord with the Langmuir adsorption isotherm model and the pseudo-second-order kinetic model. When the pH value, contact time and the mass of the composite absorbent was 3, 1 h and 100 mg, respectively, the removal rate of Hg(II) on the composite absorbent reached 77%, and the maximum adsorption capacity of Hg(II) reached 195.7 mg g−1. |
| first_indexed | 2024-12-11T06:56:53Z |
| format | Article |
| id | doaj.art-10bef227f0da4274af54a1eeef71fcc2 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-11T06:56:53Z |
| publishDate | 2017-01-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-10bef227f0da4274af54a1eeef71fcc22022-12-22T01:16:43ZengThe Royal SocietyRoyal Society Open Science2054-57032017-01-0141210.1098/rsos.170829170829Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II)Yong FuXiaoxu XuYue HuangJianshe HuQifan ChenYaoqing WuA new composite absorbent with multifunctional and environmental-friendly structures was prepared using chitosan, diatomite and polyvinyl alcohol as the raw materials, and glutaraldehyde as a cross-linking agent. The structure and morphology of the composite absorbent, and its adsorption properties of Hg(II) in water were characterized with Fourier transform infrared (FT-IR) spectra, scanning electron microscope (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET) measurements and ultraviolet–visible (UV–Vis) spectra. The effect of the pH value and contact time on the removal rate and absorbance of Hg(II) was discussed. The adsorption kinetic model and static adsorption isotherm and regeneration of the obtained composite absorbent were investigated. The results indicated that the removal of Hg(II) on the composite absorbent followed a rapid adsorption for 50 min, and was close to the adsorption saturation after 1 h, which is in accord with the Langmuir adsorption isotherm model and the pseudo-second-order kinetic model. When the pH value, contact time and the mass of the composite absorbent was 3, 1 h and 100 mg, respectively, the removal rate of Hg(II) on the composite absorbent reached 77%, and the maximum adsorption capacity of Hg(II) reached 195.7 mg g−1.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170829chitosandiatomiteabsorbentabsorption kinetic modelmercury ions |
| spellingShingle | Yong Fu Xiaoxu Xu Yue Huang Jianshe Hu Qifan Chen Yaoqing Wu Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II) Royal Society Open Science chitosan diatomite absorbent absorption kinetic model mercury ions |
| title | Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II) |
| title_full | Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II) |
| title_fullStr | Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II) |
| title_full_unstemmed | Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II) |
| title_short | Preparation of new diatomite–chitosan composite materials and their adsorption properties and mechanism of Hg(II) |
| title_sort | preparation of new diatomite chitosan composite materials and their adsorption properties and mechanism of hg ii |
| topic | chitosan diatomite absorbent absorption kinetic model mercury ions |
| url | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170829 |
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