ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS
Removal of Cd2+, Pb2+, and Ni2+ from aqueous solutions using cellulose-graft-acrylic acid (C-g-AA) hydrogels was investigated. Various factors affecting the adsorption capacity, such as pH, time, initial ions concentration, and competitive ions, were tested. The results showed that the adsorption of...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2012-05-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_2752_Zhou_ZFZZ_Adsorption_Cd_Pb_Ni_Cellulose_Hydrogels/1538 |
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| author | Yiming Zhou, Liangliang Zhang, Shiyu Fu, Liming Zheng, Huaiyu Zhan |
| author_facet | Yiming Zhou, Liangliang Zhang, Shiyu Fu, Liming Zheng, Huaiyu Zhan |
| author_sort | Yiming Zhou, |
| collection | DOAJ |
| description | Removal of Cd2+, Pb2+, and Ni2+ from aqueous solutions using cellulose-graft-acrylic acid (C-g-AA) hydrogels was investigated. Various factors affecting the adsorption capacity, such as pH, time, initial ions concentration, and competitive ions, were tested. The results showed that the adsorption of hydrogels was very pH dependent, and maximum adsorption was obtained at a pH of 5.0. The adsorption capacities of hydrogels for the heavy metal ions were 562.7 mg/g (Cd2+), 825.7 mg/g (Pb2+), and 380.1 mg/g (Ni2+), respectively. The adsorption behavior can be very well described by the pseudo-second-order kinetic model and the Langmuir isotherm model. The observed affinity order of competitive ions adsorption is Pb2+>Ni2+>Cd2+ in mmol/g. The hydrogels can be regenerated after releasing heavy metal ions and reused three times with 15% loss of adsorption capacity. Scanning electron microscope (SEM) images and Fourier transform infrared spectroscopy (FTIR) spectra before and after ion adsorption on the hydrogels revealed that the complexation between heavy metal ions and carboxyl groups on hydrogels was the main adsorption mechanism. |
| first_indexed | 2024-12-13T00:44:32Z |
| format | Article |
| id | doaj.art-d0319ab13b0f4782a9504abd53b79815 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-12-13T00:44:32Z |
| publishDate | 2012-05-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-d0319ab13b0f4782a9504abd53b798152022-12-22T00:05:04ZengNorth Carolina State UniversityBioResources1930-21262012-05-017327522765ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELSYiming Zhou,Liangliang Zhang,Shiyu Fu,Liming Zheng,Huaiyu ZhanRemoval of Cd2+, Pb2+, and Ni2+ from aqueous solutions using cellulose-graft-acrylic acid (C-g-AA) hydrogels was investigated. Various factors affecting the adsorption capacity, such as pH, time, initial ions concentration, and competitive ions, were tested. The results showed that the adsorption of hydrogels was very pH dependent, and maximum adsorption was obtained at a pH of 5.0. The adsorption capacities of hydrogels for the heavy metal ions were 562.7 mg/g (Cd2+), 825.7 mg/g (Pb2+), and 380.1 mg/g (Ni2+), respectively. The adsorption behavior can be very well described by the pseudo-second-order kinetic model and the Langmuir isotherm model. The observed affinity order of competitive ions adsorption is Pb2+>Ni2+>Cd2+ in mmol/g. The hydrogels can be regenerated after releasing heavy metal ions and reused three times with 15% loss of adsorption capacity. Scanning electron microscope (SEM) images and Fourier transform infrared spectroscopy (FTIR) spectra before and after ion adsorption on the hydrogels revealed that the complexation between heavy metal ions and carboxyl groups on hydrogels was the main adsorption mechanism.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_2752_Zhou_ZFZZ_Adsorption_Cd_Pb_Ni_Cellulose_Hydrogels/1538Heavy metal ionsAdsorption behaviorHydrogelsCellulose |
| spellingShingle | Yiming Zhou, Liangliang Zhang, Shiyu Fu, Liming Zheng, Huaiyu Zhan ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS BioResources Heavy metal ions Adsorption behavior Hydrogels Cellulose |
| title | ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS |
| title_full | ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS |
| title_fullStr | ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS |
| title_full_unstemmed | ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS |
| title_short | ADSORPTION BEHAVIOR OF Cd2+, Pb2+, AND Ni2+ FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS |
| title_sort | adsorption behavior of cd2 pb2 and ni2 from aqueous solutions on cellulose based hydrogels |
| topic | Heavy metal ions Adsorption behavior Hydrogels Cellulose |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_2752_Zhou_ZFZZ_Adsorption_Cd_Pb_Ni_Cellulose_Hydrogels/1538 |
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