Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions
In this study, a new category of sulfone-modified chitosan derivatives as surface-selective adsorbents for the extraction of toxic Hg(II) metal has been synthesized in good yield. Sulfone-modified chitosan/5–20 based on variable loading of the corresponding phenacyl bromide (5, 10, 15, and 20% with...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2019-03-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/0263617418818957 |
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| author | Youssef O Al-Ghamdi Khalid A Alamry Mahmoud A Hussein Hadi M Marwani Abdullah M Asiri |
| author_facet | Youssef O Al-Ghamdi Khalid A Alamry Mahmoud A Hussein Hadi M Marwani Abdullah M Asiri |
| author_sort | Youssef O Al-Ghamdi |
| collection | DOAJ |
| description | In this study, a new category of sulfone-modified chitosan derivatives as surface-selective adsorbents for the extraction of toxic Hg(II) metal has been synthesized in good yield. Sulfone-modified chitosan/5–20 based on variable loading of the corresponding phenacyl bromide (5, 10, 15, and 20% with respect to the original weight of the pure chitosan) was synthesized. The β-ketosulfone derivative, namely 1–(4-bromophenyl)-2-(phenylsulfonyl)ethanone, was first prepared by treatment of the corresponding phenacyl bromide with a sufficient amount of sodium benzene sulfinate; its chemical structure was confirmed by spectral analyses, including Fourier transform infrared spectroscopy, 1 H-NMR, 13 C-NMR, and mass spectrometry. Then, sulfone-modified chitosan/5–20 derivatives were synthesized by the interaction of chitosan with a freshly prepared p-bromo-β-ketosulfone derivative in a mildly acidic aqueous solution using the solution-blending technique. Sulfone-modified chitosan/5–20 derivatives were identified and characterized using common characterization techniques, including Fourier transform infrared spectroscopy, field-emission scanning electron microscope, powder X-ray diffraction, and thermal behaviour. A strong interaction was displayed between chitosan and its corresponding β-ketosulfones in powder X-ray diffraction, which was confirmed by significant 2θ shifts. Sulfone-modified chitosan/5–20 derivatives were detected as catalysts, which efficiently increased the thermal decomposition of pure chitosan. More particularly, the efficiency of sulfone-modified chitosan/5–20 derivatives for Hg(II), Pb(II), Ni(II), Al(III), Sr(II), Cr(III), Fe(III), Zn(II), and Mn(II) detection and adsorption was also investigated using inductively coupled plasma optical emission spectrometry. The sulfone-modified chitosan/5 derivative exhibited the highest adsorption efficiency. The most effective quantitative adsorption onto the sulfone-modified chitosan/5 surface was detected at pH = 2. In addition to that, the adsorption isotherm showed that the adsorption capacity of sulfone-modified chitosan/5 for Hg(II) was 122.47 mg g −1 and that its adsorption isotherm was in agreement with the Langmuir adsorption isotherm. |
| format | Article |
| id | doaj-art-783f4299b3f7419eb3b650b09d3251df |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2019-03-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-783f4299b3f7419eb3b650b09d3251df2025-01-02T22:38:06ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382019-03-013710.1177/0263617418818957Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ionsYoussef O Al-GhamdiKhalid A AlamryMahmoud A HusseinHadi M MarwaniAbdullah M AsiriIn this study, a new category of sulfone-modified chitosan derivatives as surface-selective adsorbents for the extraction of toxic Hg(II) metal has been synthesized in good yield. Sulfone-modified chitosan/5–20 based on variable loading of the corresponding phenacyl bromide (5, 10, 15, and 20% with respect to the original weight of the pure chitosan) was synthesized. The β-ketosulfone derivative, namely 1–(4-bromophenyl)-2-(phenylsulfonyl)ethanone, was first prepared by treatment of the corresponding phenacyl bromide with a sufficient amount of sodium benzene sulfinate; its chemical structure was confirmed by spectral analyses, including Fourier transform infrared spectroscopy, 1 H-NMR, 13 C-NMR, and mass spectrometry. Then, sulfone-modified chitosan/5–20 derivatives were synthesized by the interaction of chitosan with a freshly prepared p-bromo-β-ketosulfone derivative in a mildly acidic aqueous solution using the solution-blending technique. Sulfone-modified chitosan/5–20 derivatives were identified and characterized using common characterization techniques, including Fourier transform infrared spectroscopy, field-emission scanning electron microscope, powder X-ray diffraction, and thermal behaviour. A strong interaction was displayed between chitosan and its corresponding β-ketosulfones in powder X-ray diffraction, which was confirmed by significant 2θ shifts. Sulfone-modified chitosan/5–20 derivatives were detected as catalysts, which efficiently increased the thermal decomposition of pure chitosan. More particularly, the efficiency of sulfone-modified chitosan/5–20 derivatives for Hg(II), Pb(II), Ni(II), Al(III), Sr(II), Cr(III), Fe(III), Zn(II), and Mn(II) detection and adsorption was also investigated using inductively coupled plasma optical emission spectrometry. The sulfone-modified chitosan/5 derivative exhibited the highest adsorption efficiency. The most effective quantitative adsorption onto the sulfone-modified chitosan/5 surface was detected at pH = 2. In addition to that, the adsorption isotherm showed that the adsorption capacity of sulfone-modified chitosan/5 for Hg(II) was 122.47 mg g −1 and that its adsorption isotherm was in agreement with the Langmuir adsorption isotherm.https://doi.org/10.1177/0263617418818957 |
| spellingShingle | Youssef O Al-Ghamdi Khalid A Alamry Mahmoud A Hussein Hadi M Marwani Abdullah M Asiri Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions Adsorption Science & Technology |
| title | Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions |
| title_full | Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions |
| title_fullStr | Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions |
| title_full_unstemmed | Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions |
| title_short | Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions |
| title_sort | sulfone modified chitosan as selective adsorbent for the extraction of toxic hg ii metal ions |
| url | https://doi.org/10.1177/0263617418818957 |
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