Remediation of 137Cs radionuclide in nuclear waste effluents by polymer composite: adsorption kinetics,isotherms and gamma irradiation studies |
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| Authors: | Michael A. Olatunji Mayeen U. Khandaker Ekramul H. N. M. Mahmud Yusoff Md. Amin Janet A. Ademola Deborah O. Olorode |
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| Affiliation: | 1.Applied Radiation Laboratory, Department of Physics,University of Malaya,Kuala Lumpur,Malaysia;2.Center for Radiation Sciences, School of Healthcare and Medical Sciences,Sunway University,Bandar Sunway,Malaysia;3.Polymer Laboratory, Department of Chemistry,University of Malaya,Kuala Lumpur,Malaysia;4.Department of Physics,University of Ibadan,Ibadan,Nigeria;5.Department of Physics,University of Lagos,Akoka-Yaba,Nigeria |
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| Abstract: | Polypyrrole is incorporated with activated carbon in large size dopant solution and investigated for 137Cs removal studies. Adsorption experiments showed optimum conditions within 240 min contact time, pH 6, 0.2 g adsorbent and?≤?100 mg/l adsorbate dose, respectively, while the kinetic data followed pseudo-first-order model. Isotherm data were reproducible by the Langmuir isotherm yielding 23 mg/g maximum sorption capacity. Regeneration of adsorbent was attempted and indicated promising results within three cycles. The surface behavior has also been examined and revealed a well-ordered structure under gamma irradiation. This is a cheap adsorbent to consider and has also proven to possess higher sorption capacity than most highly-cost inorganic materials in use. |
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