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| Title: | Quantifying the availability and the stability of trace cationic elements in fly ash |
| Author (s): | Wang, Tian Wang, Jianmin Ban, Heng Ladwig, Ken |
| Department/Lab Affiliations: | Civil, Architectural & Environmental Engineering Environmental Research Center |
| Keywords: | leaching |
| Issue Date: | 2007 |
| Publisher: | Elsevier |
| Citation: | Wang, T., Wang, J., Ban, H., and Ladwig, K. (2007) Quantifying the Availability and the Stability of Trace Cationic Elements in Fly Ash. Waste Management, 27, 1345-1355. |
| Abstract: | For adsorption–desorption controlled leaching processes, the total leachable mass and the adsorption constant are parameters representing the availability and the stability of trace elements in solid media. With these parameters, one can predict the leaching behavior of trace elements from solids under various pH and solid-to-liquid ratio conditions. An approach was developed in this paper to determine these parameters for model elements Cu(II), Cd(II), and Ni(II) in fly ash. This approach consists of a batch equilibrium titration, a batch equilibrium leaching with and without target element addition, and mathematical modeling. Results indicated that the adsorption constant of a trace element can be determined by modeling the adsorption ratio of the added element to the system as a function of pH. Results also indicated that the trace element originally present in fly ash had similar adsorption–desorption behavior as that added externally. By modeling the batch leaching data with and without external element addition, the total leachable mass and adsorption constant of the target element can be determined simultaneously. The total leachable mass is in agreement with experimental data from 50 mM EDTA extraction. |
| 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 | Quantifying the availability and the stability of trace cationic elements in fly ash |
| contributor.author | Wang, Tian |
| contributor.author | Wang, Jianmin |
| contributor.author | Ban, Heng |
| contributor.author | Ladwig, Ken |
| contributor.deptlab | Civil, Architectural & Environmental Engineering |
| contributor.deptlab | Environmental Research Center |
| contributor.sponsor | Electric Power Research Institution |
| subject | leaching |
| date.issued | 2007 |
| publisher | Elsevier |
| identifier.citation | Wang, T., Wang, J., Ban, H., and Ladwig, K. (2007) Quantifying the Availability and the Stability of Trace Cationic Elements in Fly Ash. Waste Management, 27, 1345-1355. |
| identifier.pub.URI | |
| description.abstract | For adsorption–desorption controlled leaching processes, the total leachable mass and the adsorption constant are parameters representing the availability and the stability of trace elements in solid media. With these parameters, one can predict the leaching behavior of trace elements from solids under various pH and solid-to-liquid ratio conditions. An approach was developed in this paper to determine these parameters for model elements Cu(II), Cd(II), and Ni(II) in fly ash. This approach consists of a batch equilibrium titration, a batch equilibrium leaching with and without target element addition, and mathematical modeling. Results indicated that the adsorption constant of a trace element can be determined by modeling the adsorption ratio of the added element to the system as a function of pH. Results also indicated that the trace element originally present in fly ash had similar adsorption–desorption behavior as that added externally. By modeling the batch leaching data with and without external element addition, the total leachable mass and adsorption constant of the target element can be determined simultaneously. The total leachable mass is in agreement with experimental data from 50 mM EDTA extraction. |
| type | Article - Journal |
| type.DCMIType | text |
| 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 | 2007-12-17T20:54:40Z |
| identifier.persist.URI |