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| Title: | Fluoride adsorption onto activated alumina: modeling the effects of pH and some competing ions |
| Author (s): | Tang, Yulin Guan, Xiaohong Su, Tingzhi Gao, Naiyun Wang, Jianmin |
| Department/Lab Affiliations: | Civil, Architectural & Environmental Engineering Environmental Research Center University Transportation Center |
| Keywords: | Arsenic competitive adsorption fluoride selenium speciation-based model |
| Issue Date: | 2008 |
| Publisher: | Elsevier |
| Citation: | Yulin Tang, Xiaohong Guan, Tingzhi Su, Naiyun Gao, and Jianmin Wang. "Flouride adsorption onto activated alumina: Modeling the effects of pH and some competing ions." Colloids and Surfaces A: Physicochemical and Engineering Aspects. Volume 337, Issues 1-3, April 2009, 33-38 |
| Abstract: | The adsorption characteristics of fluoride on activated alumina (AA) were studied using batch methods. Effects of reaction time, pH, ionic strength, and coexisting anions were determined. Kinetics data indicated that the fluoride adsorption process reached equilibrium within 10 h. In an experimental pH range of 5–10.5, fluoride uptake decreased with the increase of pH. Ionic strength did not impact fluoride adsorption in the entire experimental pH range. However, major anions reduced fluoride adsorption in the order of HPO42− > HCO3− > SO42− > Cl−. Other toxic elements that might coexist with fluoride in groundwater, such as arsenic and selenium, also reduced fluoride adsorption through competition for the same surface sites. A speciation-based model was used to quantify the fluoride adsorption on activated alumina as functions of pH, with and without competing toxic elements. This model simulated fluoride adsorption well over a broad pH range of 5–10.5, and a wide surface loading range of 1–10 mg-F/g adsorbent. |
| Type: | Article - Journal text |
| In Title: | Colloids and Surfaces A |
| 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: |
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| title | Fluoride adsorption onto activated alumina: modeling the effects of pH and some competing ions |
| contributor.author | Tang, Yulin |
| contributor.author | Guan, Xiaohong |
| contributor.author | Su, Tingzhi |
| contributor.author | Gao, Naiyun |
| contributor.author | Wang, Jianmin |
| contributor.deptlab | Civil, Architectural & Environmental Engineering |
| contributor.deptlab | Environmental Research Center |
| contributor.deptlab | University Transportation Center |
| contributor.sponsor | China Scholarship Council |
| subject | Arsenic |
| subject | competitive adsorption |
| subject | fluoride |
| subject | selenium |
| subject | speciation-based model |
| date.issued | 2008 |
| publisher | Elsevier |
| identifier.citation | Yulin Tang, Xiaohong Guan, Tingzhi Su, Naiyun Gao, and Jianmin Wang. "Flouride adsorption onto activated alumina: Modeling the effects of pH and some competing ions." Colloids and Surfaces A: Physicochemical and Engineering Aspects. Volume 337, Issues 1-3, April 2009, 33-38 |
| identifier.pub.URI | |
| description.abstract | The adsorption characteristics of fluoride on activated alumina (AA) were studied using batch methods. Effects of reaction time, pH, ionic strength, and coexisting anions were determined. Kinetics data indicated that the fluoride adsorption process reached equilibrium within 10 h. In an experimental pH range of 5–10.5, fluoride uptake decreased with the increase of pH. Ionic strength did not impact fluoride adsorption in the entire experimental pH range. However, major anions reduced fluoride adsorption in the order of HPO42− > HCO3− > SO42− > Cl−. Other toxic elements that might coexist with fluoride in groundwater, such as arsenic and selenium, also reduced fluoride adsorption through competition for the same surface sites. A speciation-based model was used to quantify the fluoride adsorption on activated alumina as functions of pH, with and without competing toxic elements. This model simulated fluoride adsorption well over a broad pH range of 5–10.5, and a wide surface loading range of 1–10 mg-F/g adsorbent. |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| relation.isPartOf | Colloids and Surfaces A |
| 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 | 2009-02-25T18:00:58Z |