Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective Adsorbent
Wastewater from nuclear plants contains oxalic acid, a chelating compound used to remove surface activity. This forms complexes with radioactive cations, thereby impeding their removal by conventional techniques. In this study, oxalic acid was removed by adsorption techniques using commercial activa...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2008-05-01
|
| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361708786934415 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841563127343218688 |
|---|---|
| author | Narasimhan Gokulakrishnan Arumugam Pandurangan Pradeep Kumar Sinha |
| author_facet | Narasimhan Gokulakrishnan Arumugam Pandurangan Pradeep Kumar Sinha |
| author_sort | Narasimhan Gokulakrishnan |
| collection | DOAJ |
| description | Wastewater from nuclear plants contains oxalic acid, a chelating compound used to remove surface activity. This forms complexes with radioactive cations, thereby impeding their removal by conventional techniques. In this study, oxalic acid was removed by adsorption techniques using commercial activated carbon and various synthesised mesoporous materials, viz. Al-MCM-41 (Si/Al = 50), Al-MCM-41 (Si/Al = 100) and Si-MCM-41, as adsorbents, all of which were characterised by XRD, N 2 sorption and TEM analysis. The extent of oxalic acid removal was increased by optimising parameters such as the adsorbent employed, the contact time, the initial concentration of oxalic acid, the pH value of the aqueous solution and the temperature. Activated carbon removed a higher percentage of oxalic acid than any of the other adsorbents studied. The experimental data obtained could be fitted by the Langmuir adsorption model and also followed first-order kinetics. In addition, the negative value of the enthalpy obtained indicated that the adsorption process was exothermic in nature. |
| format | Article |
| id | doaj-art-2d12f72072694c63a7b75c51f733bd99 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2008-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-2d12f72072694c63a7b75c51f733bd992025-01-03T00:11:32ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382008-05-012610.1260/026361708786934415Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective AdsorbentNarasimhan Gokulakrishnan0Arumugam Pandurangan1Pradeep Kumar Sinha2 Laboratory of Materials with Controlled Porosity, University of Haute Alsace, Mulhouse-68200, France Department of Chemistry, Anna University, Chennai-600 025, India Centralised Waste Management Facility, BARC Facilities, Kalpakkam-603102, IndiaWastewater from nuclear plants contains oxalic acid, a chelating compound used to remove surface activity. This forms complexes with radioactive cations, thereby impeding their removal by conventional techniques. In this study, oxalic acid was removed by adsorption techniques using commercial activated carbon and various synthesised mesoporous materials, viz. Al-MCM-41 (Si/Al = 50), Al-MCM-41 (Si/Al = 100) and Si-MCM-41, as adsorbents, all of which were characterised by XRD, N 2 sorption and TEM analysis. The extent of oxalic acid removal was increased by optimising parameters such as the adsorbent employed, the contact time, the initial concentration of oxalic acid, the pH value of the aqueous solution and the temperature. Activated carbon removed a higher percentage of oxalic acid than any of the other adsorbents studied. The experimental data obtained could be fitted by the Langmuir adsorption model and also followed first-order kinetics. In addition, the negative value of the enthalpy obtained indicated that the adsorption process was exothermic in nature.https://doi.org/10.1260/026361708786934415 |
| spellingShingle | Narasimhan Gokulakrishnan Arumugam Pandurangan Pradeep Kumar Sinha Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective Adsorbent Adsorption Science & Technology |
| title | Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective Adsorbent |
| title_full | Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective Adsorbent |
| title_fullStr | Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective Adsorbent |
| title_full_unstemmed | Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective Adsorbent |
| title_short | Removal of Decontaminating Agent from Aqueous Solution Using Microporous and Mesoporous Materials: Activated Carbon as an Effective Adsorbent |
| title_sort | removal of decontaminating agent from aqueous solution using microporous and mesoporous materials activated carbon as an effective adsorbent |
| url | https://doi.org/10.1260/026361708786934415 |
| work_keys_str_mv | AT narasimhangokulakrishnan removalofdecontaminatingagentfromaqueoussolutionusingmicroporousandmesoporousmaterialsactivatedcarbonasaneffectiveadsorbent AT arumugampandurangan removalofdecontaminatingagentfromaqueoussolutionusingmicroporousandmesoporousmaterialsactivatedcarbonasaneffectiveadsorbent AT pradeepkumarsinha removalofdecontaminatingagentfromaqueoussolutionusingmicroporousandmesoporousmaterialsactivatedcarbonasaneffectiveadsorbent |