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| Adsorption Performance of Cr6+, Ni2+ on a Novel Spherical Cellulose Chelating Adsorbent |
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| DOI： |
| Key Words:chelating adsorbent; selective adsorption; adsorption isotherm; kinetics |
| Fund Project:国家自然科学基金（21077024）；中国博士后基金（20070410238）；中国博士后基金特别资助（200801239）。 |
| Author Name | Affiliation | | 刘以凡1,2 | 1.福州大学环境与资源学院，福建福州，350108；2.福建省生物质资源化技术开发基地，福建福州，350108 | | 刘明华1,2,* | 1.福州大学环境与资源学院，福建福州，350108；2.福建省生物质资源化技术开发基地，福建福州，350108 | | 姚梅宾1 | 1.福州大学环境与资源学院，福建福州，350108 | | 黄统琳1 | 1.福州大学环境与资源学院，福建福州，350108 | | 陈若其1 | 1.福州大学环境与资源学院，福建福州，350108 |
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| Abstract: |
| The selective adsorption of Cr6+, Ni2+ and static absorption of Cr6+ and Ni2+ on a novel spherical chelating cellulose adsorbent (SCCA) containing caoboxyl and imidazolyl groups were studied. The results showed that SCCA has good adsorption performance for Cr6+, and follows the relation of Langmuir adsorption isotherm formula. The adsorption capacity increases with an increase of solution temperature. The saturation adsorption capacity for Cr6+ is 53.48 mg/g under the optimum conditions (60℃ of adsorption temperature, 2 hours of adsorption time, 1 of solution pH). SCCA has bad adsorption performance for Ni2+, and it follows the relation of Langmuir and Freundlich adsorption isotherm formulas. The adsorption processes of Cr6+ and Ni2+ are controlled both by models of surface diffusion process and intraparticle diffusion process in early-time. SCCA has good adsorption selectivity for Cr6+ when Cr6+ and Ni2+ are in coexistence. The adsorption selectivity parameter is 26.38 under the solution pH value 1 and the adsorption temperature 60℃. |
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