Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa)
A phenomenological biosorption kinetic model was developed for cesium (Cs) biosorption from radioactive wastewaters by poly-γ-glutamic acid sodium salt (γ-PGANa). The biosorption by non-living biosorbent γ-PGANa is controlled by the ion-exchange mechanism and the proposed kinetic model is based on t...
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| Language: | English |
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Elsevier
2025-12-01
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| Series: | Cleaner Chemical Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772782325000051 |
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| author | Misaki Hisada Shigeki Sakamoto Kenta Sugiyama Yoshinori Kawase |
| author_facet | Misaki Hisada Shigeki Sakamoto Kenta Sugiyama Yoshinori Kawase |
| author_sort | Misaki Hisada |
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| description | A phenomenological biosorption kinetic model was developed for cesium (Cs) biosorption from radioactive wastewaters by poly-γ-glutamic acid sodium salt (γ-PGANa). The biosorption by non-living biosorbent γ-PGANa is controlled by the ion-exchange mechanism and the proposed kinetic model is based on the ion-exchange mechanism, which is disassembled in two steps, i.e., Step 1 in which Na+ from the functional group (–COONa) in γ-PGANa is released and Step 2 in which Cs+ and H+ are competitively adsorbed on negatively charged functional group −COO−. The validation of the proposed phenomenological kinetic model was conducted using the present experimental data for dynamic changes in Cs concentration obtained with the wide ranges of operation conditions at pH from 3 to 9, the dosage of γ-PGANa from 0.1 to 0.6 gL−1, the initial Cs concentration from 0.0001 to 0.1 gL−1, and temperature from 298 to 318 K. The capability of the proposed kinetic model was proved by reasonable agreement between the model predictions and the experimental results. |
| format | Article |
| id | doaj-art-689bca1d0e60457a878876351bab1285 |
| institution | Kabale University |
| issn | 2772-7823 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cleaner Chemical Engineering |
| spelling | doaj-art-689bca1d0e60457a878876351bab12852025-01-31T05:12:48ZengElsevierCleaner Chemical Engineering2772-78232025-12-0111100150Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa)Misaki Hisada0Shigeki Sakamoto1Kenta Sugiyama2Yoshinori Kawase3Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, JapanResearch Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, JapanResearch Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, JapanCorresponding author.; Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, JapanA phenomenological biosorption kinetic model was developed for cesium (Cs) biosorption from radioactive wastewaters by poly-γ-glutamic acid sodium salt (γ-PGANa). The biosorption by non-living biosorbent γ-PGANa is controlled by the ion-exchange mechanism and the proposed kinetic model is based on the ion-exchange mechanism, which is disassembled in two steps, i.e., Step 1 in which Na+ from the functional group (–COONa) in γ-PGANa is released and Step 2 in which Cs+ and H+ are competitively adsorbed on negatively charged functional group −COO−. The validation of the proposed phenomenological kinetic model was conducted using the present experimental data for dynamic changes in Cs concentration obtained with the wide ranges of operation conditions at pH from 3 to 9, the dosage of γ-PGANa from 0.1 to 0.6 gL−1, the initial Cs concentration from 0.0001 to 0.1 gL−1, and temperature from 298 to 318 K. The capability of the proposed kinetic model was proved by reasonable agreement between the model predictions and the experimental results.http://www.sciencedirect.com/science/article/pii/S2772782325000051Biosorption kinetic modelPoly-γ-glutamic acid sodium salt biosorbentCs biosorptionIon-exchange mechanism |
| spellingShingle | Misaki Hisada Shigeki Sakamoto Kenta Sugiyama Yoshinori Kawase Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa) Cleaner Chemical Engineering Biosorption kinetic model Poly-γ-glutamic acid sodium salt biosorbent Cs biosorption Ion-exchange mechanism |
| title | Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa) |
| title_full | Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa) |
| title_fullStr | Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa) |
| title_full_unstemmed | Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa) |
| title_short | Phenomenological kinetic model for biosorption of cesium (Cs) by poly-γ-glutamic acid sodium salt (γ-PGANa) |
| title_sort | phenomenological kinetic model for biosorption of cesium cs by poly γ glutamic acid sodium salt γ pgana |
| topic | Biosorption kinetic model Poly-γ-glutamic acid sodium salt biosorbent Cs biosorption Ion-exchange mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2772782325000051 |
| work_keys_str_mv | AT misakihisada phenomenologicalkineticmodelforbiosorptionofcesiumcsbypolygglutamicacidsodiumsaltgpgana AT shigekisakamoto phenomenologicalkineticmodelforbiosorptionofcesiumcsbypolygglutamicacidsodiumsaltgpgana AT kentasugiyama phenomenologicalkineticmodelforbiosorptionofcesiumcsbypolygglutamicacidsodiumsaltgpgana AT yoshinorikawase phenomenologicalkineticmodelforbiosorptionofcesiumcsbypolygglutamicacidsodiumsaltgpgana |