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| Title: | Quantifying effects of pH and surface loading on arsenic adsorption on nanoactive alumina using a speciation-based model |
| Author (s): | Guan, Xiao-Hong Su, Tingzhi Wang, Jianmin |
| Department/Lab Affiliations: | Civil, Architectural & Environmental Engineering Environmental Research Center University Transportation Center |
| Keywords: | FTIR alumina speciation-based model |
| Subject Terms: | Adsorption. Arsenic. Fourier transform infrared spectroscopy. |
| Issue Date: | 2009-07 |
| Publisher: | Elsevier |
| Citation: | Guan, Xiao-Hong, Tingzhi Su, and Jianmin Wang. "Quantifying effects of pH and surface loading on arsenic adsorption on NanoActive alumina using a speciation-based model", Journal of Hazardous Materials, Vol. 166, Issue 1, July 2009: 39-45. |
| Abstract: | Arsenic (As) poses a significant water quality problem and challenge for the environmental engineers and scientists throughout the world. Batch tests were carried out in this study to investigate the adsorption of As(V) on NanoActive alumina. The arsenate adsorption envelopes on NanoActive alumina exhibited broad adsorption maxima when the initial As(V) loading was less than a 50 mg g−1 sorbent. As the initial As(V) loading increased to 50 mg g−1 sorbent, a distinct adsorption maximum was observed at pH 3.2–4.6. FTIR spectra revealed that only monodentate complexes were formed upon the adsorption of arsenate on NanoActive alumina over the entire pH range and arsenic loading conditions examined in this study. A speciation-based adsorption model was developed to describe arsenate adsorption on NanoActive alumina and it could simulate arsenate adsorption very well in a broad pH range of 1–10, and a wide arsenic loading range of 0.5–50 mg g−1 adsorbent. Only four adjustable parameters, including three adsorption constants, were included in this model. This model offers a substantial improvement over existing models in accuracy and simplification in quantifying pH and surface loading effects on arsenic adsorption. |
| Type: | Article - Journal text |
| In Title: | Journal of Hazardous Materials |
| 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 | Quantifying effects of pH and surface loading on arsenic adsorption on nanoactive alumina using a speciation-based model |
| contributor.author | Guan, Xiao-Hong |
| contributor.author | Su, Tingzhi |
| contributor.author | Wang, Jianmin |
| contributor.deptlab | Civil, Architectural & Environmental Engineering |
| contributor.deptlab | Environmental Research Center |
| contributor.deptlab | University Transportation Center |
| contributor.sponsor | Development Program for Outstanding Young Teachers at Harbin Institute of Technology |
| contributor.sponsor | Natural Scientific Research Innovation Foundation at Harbin Institute of Technology |
| subject | FTIR |
| subject | alumina |
| subject | speciation-based model |
| subject.LCSH | Adsorption. |
| subject.LCSH | Arsenic. |
| subject.LCSH | Fourier transform infrared spectroscopy. |
| date.issued | 2009-07 |
| publisher | Elsevier |
| identifier.citation | Guan, Xiao-Hong, Tingzhi Su, and Jianmin Wang. "Quantifying effects of pH and surface loading on arsenic adsorption on NanoActive alumina using a speciation-based model", Journal of Hazardous Materials, Vol. 166, Issue 1, July 2009: 39-45. |
| identifier.pub.URI | |
| description.abstract | Arsenic (As) poses a significant water quality problem and challenge for the environmental engineers and scientists throughout the world. Batch tests were carried out in this study to investigate the adsorption of As(V) on NanoActive alumina. The arsenate adsorption envelopes on NanoActive alumina exhibited broad adsorption maxima when the initial As(V) loading was less than a 50 mg g−1 sorbent. As the initial As(V) loading increased to 50 mg g−1 sorbent, a distinct adsorption maximum was observed at pH 3.2–4.6. FTIR spectra revealed that only monodentate complexes were formed upon the adsorption of arsenate on NanoActive alumina over the entire pH range and arsenic loading conditions examined in this study. A speciation-based adsorption model was developed to describe arsenate adsorption on NanoActive alumina and it could simulate arsenate adsorption very well in a broad pH range of 1–10, and a wide arsenic loading range of 0.5–50 mg g−1 adsorbent. Only four adjustable parameters, including three adsorption constants, were included in this model. This model offers a substantial improvement over existing models in accuracy and simplification in quantifying pH and surface loading effects on arsenic adsorption. |
| type | Article - Journal |
| type.DCMIType | text |
| relation.isPartOf | Journal of Hazardous Materials |
| 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 | 2009-06-03T18:54:49Z |