Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as Adsorbent
Cellulose adsorbent was prepared by ATRP grafting of glycidyl methacrylate onto a cellulose backbone with subsequent functionalization with ethanediamine, and then used for the removal of Cr(VI) from aqueous solution. Batch experiments were carried out to investigate the effects of initial pH and in...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2014-10-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_6998_Lin_Thermodynamics_Kinetics_Regeneration_Studies |
| _version_ | 1828349475459956736 |
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| author | Chunxiang Lin Sha Qiao Wei Luo Yifan Liu Danhui Liu Xiaojuan Li Minghua Liu |
| author_facet | Chunxiang Lin Sha Qiao Wei Luo Yifan Liu Danhui Liu Xiaojuan Li Minghua Liu |
| author_sort | Chunxiang Lin |
| collection | DOAJ |
| description | Cellulose adsorbent was prepared by ATRP grafting of glycidyl methacrylate onto a cellulose backbone with subsequent functionalization with ethanediamine, and then used for the removal of Cr(VI) from aqueous solution. Batch experiments were carried out to investigate the effects of initial pH and initial Cr(VI) concentration on the adsorption performance. The optimum pH for adsorption of Cr(VI) ranged from 2 to 3, and the maximum uptake of Cr(VI) from solution was 500 mg/g at pH 3.0 and 50 °C. Langmuir and Freundlich isotherms were applied to the adsorption process, and the thermodynamic parameters were calculated. The results showed that the sorption process to be feasible, spontaneous, and endothermic. Kinetics studies revealed that the pseudo-second-order kinetic model fitted well with the experimental data and the intra-particle diffusion was not the only rate-determining step for Cr(VI)sorption onto adsorbent. The cellulose adsorbent before and after Cr(VI) adsorption were characterized using scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDX), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). Regeneration of cellulose adsorbent loaded with Cr(VI) can be achieved by treating with 2.0M NaOH. |
| first_indexed | 2024-04-14T01:10:11Z |
| format | Article |
| id | doaj.art-47962a3675f74603b8c2a58a8d522271 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-14T01:10:11Z |
| publishDate | 2014-10-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-47962a3675f74603b8c2a58a8d5222712022-12-22T02:21:05ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-10-01946998701710.15376/biores.9.4.6998-7017Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as AdsorbentChunxiang Lin0Sha Qiao1Wei Luo2Yifan Liu3Danhui Liu4Xiaojuan Li5Minghua Liu6College of Environment & Resources, Fuzhou University, Fuzhou 350108 China; ChinaCollege of Environment & Resources, Fuzhou University, Fuzhou 350108 China; ChinaCollege of Environment & Resources, Fuzhou University, Fuzhou 350108 China; ChinaCollege of Environment & Resources, Fuzhou University, Fuzhou 350108 China; ChinaCollege of Environment & Resources, Fuzhou University, Fuzhou 350108 China; ChinaCollege of Environment & Resources, Fuzhou University, Fuzhou 350108 China; ChinaCollege of Environment & Resources, Fuzhou University, Fuzhou 350108 China; ChinaCellulose adsorbent was prepared by ATRP grafting of glycidyl methacrylate onto a cellulose backbone with subsequent functionalization with ethanediamine, and then used for the removal of Cr(VI) from aqueous solution. Batch experiments were carried out to investigate the effects of initial pH and initial Cr(VI) concentration on the adsorption performance. The optimum pH for adsorption of Cr(VI) ranged from 2 to 3, and the maximum uptake of Cr(VI) from solution was 500 mg/g at pH 3.0 and 50 °C. Langmuir and Freundlich isotherms were applied to the adsorption process, and the thermodynamic parameters were calculated. The results showed that the sorption process to be feasible, spontaneous, and endothermic. Kinetics studies revealed that the pseudo-second-order kinetic model fitted well with the experimental data and the intra-particle diffusion was not the only rate-determining step for Cr(VI)sorption onto adsorbent. The cellulose adsorbent before and after Cr(VI) adsorption were characterized using scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDX), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). Regeneration of cellulose adsorbent loaded with Cr(VI) can be achieved by treating with 2.0M NaOH.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_6998_Lin_Thermodynamics_Kinetics_Regeneration_StudiesCellulose adsorbentCr(VI)AdsorptionKineticsThermodynamics |
| spellingShingle | Chunxiang Lin Sha Qiao Wei Luo Yifan Liu Danhui Liu Xiaojuan Li Minghua Liu Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as Adsorbent BioResources Cellulose adsorbent Cr(VI) Adsorption Kinetics Thermodynamics |
| title | Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as Adsorbent |
| title_full | Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as Adsorbent |
| title_fullStr | Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as Adsorbent |
| title_full_unstemmed | Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as Adsorbent |
| title_short | Thermodynamics, Kinetics, and Regeneration Studies for Adsorption of Cr(VI) from Aqueous Solutions using Modified Cellulose as Adsorbent |
| title_sort | thermodynamics kinetics and regeneration studies for adsorption of cr vi from aqueous solutions using modified cellulose as adsorbent |
| topic | Cellulose adsorbent Cr(VI) Adsorption Kinetics Thermodynamics |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_6998_Lin_Thermodynamics_Kinetics_Regeneration_Studies |
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