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| Title: | Adsorption characteristics of As(V), Se(IV), and V(V) onto activated alumina: effects of pH, surface loading, and ionic strength |
| Author (s): | Su, Tingzhi Guan, Xiaohong Gu, Guowei Wang, Jianmin |
| Department/Lab Affiliations: | Civil, Architectural & Environmental Engineering Environmental Research Center University Transportation Center |
| Keywords: | activated alumina speciation-based model |
| Subject Terms: | Adsorption. Arsenic. Selenium. Vanadium. |
| Issue Date: | 2008-10 |
| Publisher: | Elsevier |
| Citation: | Su,Tingzhi, Xiaohong Guan, Guowei Gu, and Jianmin Wang. "Adsorption characteristics of As(V), Se(IV), and V(V) onto activated alumina: Effects of pH, surface loading, and ionic strength". Journal of Colloid and Interface Science 326(2) (October 2008): 347-353. |
| Abstract: | Arsenic, selenium, and vanadium are major anionic elements of concern in drinking water. This research investigated the adsorption characteristics of As(V), Se(IV), and V(V) onto a commercial activated alumina (AA) under different pH, surface loading, and ionic strength conditions using batch systems. The results indicated that the adsorption of these elements was significantly affected by pH and the surface loading. However, ionic strength generally did not impact their adsorption, indicating that the electrostatic effect on the adsorption of these elements was relatively not important compared to surface chemical reactions. A speciation-based adsorption model was used to simulate the adsorption of As(V), Se(IV), and V(V) by activated alumina and to determine the adsorption constants of different element species. This model can satisfactorily predict the adsorption of these elements in a broad pH range from 1.5 to 12 and a wide surface loading range from 1.0 to 50 mg/g activated alumina for different sorbent concentrations, using the same set of adsorption constants. |
| Type: | Article - Journal text |
| In Title: | Journal of Colloid and Interface Science |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Pre-print: author can archive; Post-print: author can archive; FULL COPYRIGHT INFORMATION: |
| Publisher URL: | |
| Link to this page: |
| title | Adsorption characteristics of As(V), Se(IV), and V(V) onto activated alumina: effects of pH, surface loading, and ionic strength |
| contributor.author | Su, Tingzhi |
| contributor.author | Guan, Xiaohong |
| contributor.author | Gu, Guowei |
| contributor.author | Wang, Jianmin |
| contributor.deptlab | Civil, Architectural & Environmental Engineering |
| contributor.deptlab | Environmental Research Center |
| contributor.deptlab | University Transportation Center |
| contributor.sponsor | Environmental Research Center at the Missouri University of Science and Technology |
| subject | activated alumina |
| subject | speciation-based model |
| subject.LCSH | Adsorption. |
| subject.LCSH | Arsenic. |
| subject.LCSH | Selenium. |
| subject.LCSH | Vanadium. |
| date.issued | 2008-10 |
| publisher | Elsevier |
| identifier.citation | Su,Tingzhi, Xiaohong Guan, Guowei Gu, and Jianmin Wang. "Adsorption characteristics of As(V), Se(IV), and V(V) onto activated alumina: Effects of pH, surface loading, and ionic strength". Journal of Colloid and Interface Science 326(2) (October 2008): 347-353. |
| identifier.pub.URI | |
| description.abstract | Arsenic, selenium, and vanadium are major anionic elements of concern in drinking water. This research investigated the adsorption characteristics of As(V), Se(IV), and V(V) onto a commercial activated alumina (AA) under different pH, surface loading, and ionic strength conditions using batch systems. The results indicated that the adsorption of these elements was significantly affected by pH and the surface loading. However, ionic strength generally did not impact their adsorption, indicating that the electrostatic effect on the adsorption of these elements was relatively not important compared to surface chemical reactions. A speciation-based adsorption model was used to simulate the adsorption of As(V), Se(IV), and V(V) by activated alumina and to determine the adsorption constants of different element species. This model can satisfactorily predict the adsorption of these elements in a broad pH range from 1.5 to 12 and a wide surface loading range from 1.0 to 50 mg/g activated alumina for different sorbent concentrations, using the same set of adsorption constants. |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| relation.isPartOf | Journal of Colloid and Interface Science |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights | Pre-print: author can archive; Post-print: author can archive; |
| rights.URI | |
| identifier.persist.URI | |
| date.available | 2008-11-24T15:43:26Z |