Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study
A radiotracer technique was used to study the removal of Hg(II) ions from aqueous solutions by polyaniline. It was shown that an increase in the concentration of the adsorptive (10 −7 –10 −2 M), temperature (303–333 K) and pH (ca. 3–10) enhanced the removal of these ions. The first-order uptake of H...
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SAGE Publishing
2004-07-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617042879483 |
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| author | R.K. Gupta Som Shankar |
| author_facet | R.K. Gupta Som Shankar |
| author_sort | R.K. Gupta |
| collection | DOAJ |
| description | A radiotracer technique was used to study the removal of Hg(II) ions from aqueous solutions by polyaniline. It was shown that an increase in the concentration of the adsorptive (10 −7 –10 −2 M), temperature (303–333 K) and pH (ca. 3–10) enhanced the removal of these ions. The first-order uptake of Hg(II) ions conformed to the Freundlich and Dubinin and Radushkevich (D–R) isotherms over the entire adsorptive concentration range (10 −7 –10 −2 M), whereas the Langmuir isotherm was followed only at moderate concentrations. Thermal data showed that this process was endothermic in nature. The radiation stability of polyaniline was also investigated by exposing it to an 11.1 GBq (Ra/Be) source associated with a γ-dose of 1.72 Gy/h. Irradiation had practically no significant effect on the adsorption capacity of polyaniline. Desorption experiments showed that the process of Hg(II) ion adsorption by polyaniline was almost irreversible and chemisorptive in nature. |
| format | Article |
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| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2004-07-01 |
| publisher | SAGE Publishing |
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| series | Adsorption Science & Technology |
| spelling | doaj-art-7fd985eb4afc4792bafeee3488e400d82025-01-02T22:37:24ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382004-07-012210.1260/0263617042879483Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer StudyR.K. Gupta0Som Shankar1 Molecular Electronics Laboratory, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi-221005, India Nuclear and Radiochemistry Laboratory, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi-221005, IndiaA radiotracer technique was used to study the removal of Hg(II) ions from aqueous solutions by polyaniline. It was shown that an increase in the concentration of the adsorptive (10 −7 –10 −2 M), temperature (303–333 K) and pH (ca. 3–10) enhanced the removal of these ions. The first-order uptake of Hg(II) ions conformed to the Freundlich and Dubinin and Radushkevich (D–R) isotherms over the entire adsorptive concentration range (10 −7 –10 −2 M), whereas the Langmuir isotherm was followed only at moderate concentrations. Thermal data showed that this process was endothermic in nature. The radiation stability of polyaniline was also investigated by exposing it to an 11.1 GBq (Ra/Be) source associated with a γ-dose of 1.72 Gy/h. Irradiation had practically no significant effect on the adsorption capacity of polyaniline. Desorption experiments showed that the process of Hg(II) ion adsorption by polyaniline was almost irreversible and chemisorptive in nature.https://doi.org/10.1260/0263617042879483 |
| spellingShingle | R.K. Gupta Som Shankar Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study Adsorption Science & Technology |
| title | Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study |
| title_full | Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study |
| title_fullStr | Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study |
| title_full_unstemmed | Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study |
| title_short | Toxic Waste Removal from Aqueous Solutions by Polyaniline: A Radiotracer Study |
| title_sort | toxic waste removal from aqueous solutions by polyaniline a radiotracer study |
| url | https://doi.org/10.1260/0263617042879483 |
| work_keys_str_mv | AT rkgupta toxicwasteremovalfromaqueoussolutionsbypolyanilinearadiotracerstudy AT somshankar toxicwasteremovalfromaqueoussolutionsbypolyanilinearadiotracerstudy |