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| Title: | Removal of arsenic from water using granular ferric hydroxide: macroscopic and microscopic studies |
| Author (s): | Guan, Xiaohong Wang, Jianmin Chusuei, Charles C. |
| Department/Lab Affiliations: | Chemistry Civil, Architectural & Environmental Engineering Environmental Research Center |
| Keywords: | Adsorption Arsenic EXAFS FTIR Granular ferric hydroxide water |
| Issue Date: | 2007 |
| Publisher: | Elsevier |
| Citation: | Guan, X., Wang, J., Chusuei, C., 2008. “Removal of arsenic from water using granular ferric hydroxide: macroscopic and microscopic studies”. J. Hazard Mater. doi: 10.1016/j.hazmat.2007.12.012. |
| Abstract: | Removal of arsenate from water using granular ferric hydroxide (GFH) was investigated under different pH and As(V) loading conditions, using batch equilibrium adsorption, FTIR, and EXAFS methods. The arsenate adsorption envelopes on GFH exhibited broad adsorption maxima when the initial As(V) concentration was less than 500 mg/L at sorbent concentration of 10 g/L. As the initial As(V) concentration increased to 500, 1000 or 2000 mg/L for the same sorbent concentration, distinct adsorption maxima appeared and shifted to lower pH. Acidimetric–alkalimetric titration and arsenic adsorption isotherm data indicated that the surface of GFH is high heterogeneous. FTIR spectra revealed that complexes of two different structures, bidentate and monodentate, were formed upon the adsorption of arsenate on GFH, and bidentate complexes were only observed at pH values greater than 6. The EXAFS analyses confirmed that arsenate form bidentate binuclear complexes with GFH at pH 7.4 as evidenced by an average Fe-As(V) bond distance of 3.32 Å. |
| Type: | Article - Journal text |
| 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. FULL COPYRIGHT INFORMATION: |
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| title | Removal of arsenic from water using granular ferric hydroxide: macroscopic and microscopic studies |
| contributor.author | Guan, Xiaohong |
| contributor.author | Wang, Jianmin |
| contributor.author | Chusuei, Charles C. |
| contributor.deptlab | Chemistry |
| contributor.deptlab | Civil, Architectural & Environmental Engineering |
| contributor.deptlab | Environmental Research Center |
| subject | Adsorption |
| subject | Arsenic |
| subject | EXAFS |
| subject | FTIR |
| subject | Granular ferric hydroxide |
| subject | water |
| date.issued | 2007 |
| publisher | Elsevier |
| identifier.citation | Guan, X., Wang, J., Chusuei, C., 2008. “Removal of arsenic from water using granular ferric hydroxide: macroscopic and microscopic studies”. J. Hazard Mater. doi: 10.1016/j.hazmat.2007.12.012. |
| identifier.pub.URI | |
| description.abstract | Removal of arsenate from water using granular ferric hydroxide (GFH) was investigated under different pH and As(V) loading conditions, using batch equilibrium adsorption, FTIR, and EXAFS methods. The arsenate adsorption envelopes on GFH exhibited broad adsorption maxima when the initial As(V) concentration was less than 500 mg/L at sorbent concentration of 10 g/L. As the initial As(V) concentration increased to 500, 1000 or 2000 mg/L for the same sorbent concentration, distinct adsorption maxima appeared and shifted to lower pH. Acidimetric–alkalimetric titration and arsenic adsorption isotherm data indicated that the surface of GFH is high heterogeneous. FTIR spectra revealed that complexes of two different structures, bidentate and monodentate, were formed upon the adsorption of arsenate on GFH, and bidentate complexes were only observed at pH values greater than 6. The EXAFS analyses confirmed that arsenate form bidentate binuclear complexes with GFH at pH 7.4 as evidenced by an average Fe-As(V) bond distance of 3.32 Å. |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| 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.URI | |
| date.accessioned | 2007-04-11T17:00:48Z |
| date.available | 2008-04-07T21:02:33Z |
| identifier.persist.URI |