Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands
To enhance the removal of mercury (Hg(II)) and cadmium (Cd(II)) from aqueous solutions, rice bran (RB) was reacted with epichlorohydrin and then modified with ethylenediamine and sodium chloroacetate to bear iminodiacetate functional groups. The modified rice bran (MRB) was characterized by Fourier...
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| Language: | English |
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North Carolina State University
2016-07-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_7145_Zhou_Enhanced_Adsorption_Mercury_Cadmium |
| _version_ | 1818586826804297728 |
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| author | Yan Zhou Jianping Zhang Xuegang Luo Yajun Luo |
| author_facet | Yan Zhou Jianping Zhang Xuegang Luo Yajun Luo |
| author_sort | Yan Zhou |
| collection | DOAJ |
| description | To enhance the removal of mercury (Hg(II)) and cadmium (Cd(II)) from aqueous solutions, rice bran (RB) was reacted with epichlorohydrin and then modified with ethylenediamine and sodium chloroacetate to bear iminodiacetate functional groups. The modified rice bran (MRB) was characterized by Fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), energy dispersive spectroscopy (EDS), back titration, and X-ray photoelectron spectroscopy (XPS). The adsorption properties of MRB for Hg(II)/Cd(II) ions were also evaluated in batch experiments. The sorption kinetic experimental data were best described by the pseudo-second-order model. The maximum adsorption capacity (163.9 mg/g for Hg(II) at pH 5.0 and 106.4 mg/g for Cd(II) at pH 6.0) was observed at 298 K, and the isotherm adsorption equilibrium of MRB was followed by Langmuir isotherm equation. The major adsorption mechanisms should be predominantly controlled by the formation of complexes between the functional groups of MRB and Hg(II)/Cd(II) ions as well as ion-exchange. The regeneration experiments showed that the MRB could be successfully reused for six cycles when 0.1 M HCl eluent was used. |
| first_indexed | 2024-12-16T08:59:08Z |
| format | Article |
| id | doaj.art-ec1ead5410b1413db6bbffb01ce58657 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-12-16T08:59:08Z |
| publishDate | 2016-07-01 |
| publisher | North Carolina State University |
| record_format | Article |
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| spelling | doaj.art-ec1ead5410b1413db6bbffb01ce586572022-12-21T22:37:13ZengNorth Carolina State UniversityBioResources1930-21261930-21262016-07-011137145716110.15376/biores.11.3.7145-7161Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating LigandsYan Zhou0Jianping Zhang1Xuegang Luo2Yajun Luo3Mianyang Normal University, Sichuan, China; ChinaEngineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, China; ChinaEngineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, China; ChinaMianyang Normal University, Sichuan, China; ChinaTo enhance the removal of mercury (Hg(II)) and cadmium (Cd(II)) from aqueous solutions, rice bran (RB) was reacted with epichlorohydrin and then modified with ethylenediamine and sodium chloroacetate to bear iminodiacetate functional groups. The modified rice bran (MRB) was characterized by Fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), energy dispersive spectroscopy (EDS), back titration, and X-ray photoelectron spectroscopy (XPS). The adsorption properties of MRB for Hg(II)/Cd(II) ions were also evaluated in batch experiments. The sorption kinetic experimental data were best described by the pseudo-second-order model. The maximum adsorption capacity (163.9 mg/g for Hg(II) at pH 5.0 and 106.4 mg/g for Cd(II) at pH 6.0) was observed at 298 K, and the isotherm adsorption equilibrium of MRB was followed by Langmuir isotherm equation. The major adsorption mechanisms should be predominantly controlled by the formation of complexes between the functional groups of MRB and Hg(II)/Cd(II) ions as well as ion-exchange. The regeneration experiments showed that the MRB could be successfully reused for six cycles when 0.1 M HCl eluent was used.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_7145_Zhou_Enhanced_Adsorption_Mercury_CadmiumModified rice branAdsorptionMechanismsMercuryCadmium |
| spellingShingle | Yan Zhou Jianping Zhang Xuegang Luo Yajun Luo Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands BioResources Modified rice bran Adsorption Mechanisms Mercury Cadmium |
| title | Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands |
| title_full | Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands |
| title_fullStr | Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands |
| title_full_unstemmed | Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands |
| title_short | Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands |
| title_sort | enhanced adsorption of mercury ii and cadmium ii from aqueous solution onto rice bran modified with chelating ligands |
| topic | Modified rice bran Adsorption Mechanisms Mercury Cadmium |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_7145_Zhou_Enhanced_Adsorption_Mercury_Cadmium |
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