Adsorption kinetics, equilibrium and radiation effect studies of radioactive cesium by polymer‐based adsorbent

Abstract

Electroactive polypyrrole has been synthesized by oxidative polymerization of pyrrole using ferric chloride hexahydrate as oxidant in the presence of sodium dodecylbenzene sulfonate (SDBS), and used to remove radioactive cesium from aqueous solution. The SDBS‐doped polypyrrole (PPy/SDBS) adsorbent was characterized by Field emission scanning electron microscopy, X‐ray diffraction and Fourier transform infrared techniques. A rapid and efficient adsorption of 137Cs radionuclide with a maximum sorption capacity of 26.2 mg/g has been achieved at 313 K. The kinetic data show the best fitting by the pseudo first‐order model while the Langmuir model properly reproduced the isotherm data. The thermodynamics parameters revealed an endothermic and spontaneous nature of the adsorption process. The adsorption efficiency shows only an insignificant variation with the gamma‐ray doses of 100 and 200 kGy. Considering the toxicity and nonbiodegradable nature of radioactive cesium, SDBS‐doped polypyrrole could be a good adsorbent for the recovery of 137Cs from radioactive effluents. J. VINYL ADDIT. TECHNOL., 24:347–357, 2018. © 2017 Society of Plastics Engineers

Rapid and Selective Uptake of Cs+ and Sr2+ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

“…137 Cs and 90 Sr are considered as the main hazardous fission products in nuclear waste due to relatively long half-lives ( t 1/2 Cs = 30.17 years, and t 1/2 Sr = 28.80 years), the ability to emit high-energy β and γ radiation, high heat release, and strong biological toxicity. − For instance, 137 Cs and 90 Sr are the major sources of the release of radioactivity after the Fukushima Daiichi Nuclear Power Plant accident, which rapidly spread into the sea causing considerable concern. , Therefore, the safe storage and disposal of 137 Cs and 90 Sr are vitally important for the sake of environmental safety and human health as well as the development of nuclear industry. However, 137 Cs + and 90 Sr 2+ ions are highly soluble and easy to migrate in the water environments .…”

Polymer-Based Nano-Adsorbent for the Removal of Lead Ions: Kinetics Studies and Optimization by Response Surface Methodology

“…The broad peak of PEI was found to be at 3350 cm −1 for Nitrogen to Hydrogen stretching, 2980-2800 cm −1 for Carbon to Hydrogen stretching, 2100 cm −1 for Carbon to Nitrogen bending, 2008 cm −1 for Carbon to Hydrogen bending, and 1580 cm −1 for Nitrogen to Hydrogen bending (Carbon to Nitrogen stretching). When the Nitrogen to Hydrogen twisting of the PEI and the Carbon to Nitrogen stretching of the pyrrole ring are now shifted to 1440 cm −1 in the PPy-PEI composite, it is obviously showing the association between the amino-rich from polyethyleneimine and polypyrrole as well as the newly synthesized polypyrrole-polyethyleneimine nanoadsorbent with rich active groups of amine groups [19,21].…”

“…This was caused by the polymer nano-hemicellulose composites of PPy-PEI decomposing, as well as the polymer nano-oligomeric adsorbents or unsaturated group breaking down under heat (thermal decomposition of PEI melting point at 500 • C). Less than 30% of the initial polymer's weight was left after the final stage's intense heat deterioration (500-800 • C) occurred, the sample's residual mass following thermal degradation of the Ppy-PEI, which reveals the type of oxidant (ammonium persulphate) utilized during synthesis [19,21,23,24].…”

“…Various conducting polymers such as polyaniline, polypyrrole, and their composites have gained substantial research interest from polymer-based adsorbents owing to their possible uses in adsorption of different heavy metal ions and dyes and electronic pollution from wastewater [8,18,19]. The simplicity of synthesis, regeneration, mechanical stability, and low cost of these conducting polymer-based adsorbents are further advantages [20,21]. According to one study, polypyrrole can remove chromium (84 percent) from an aqueous solution when the pH is alkaline [22].…”

Double-Walled Metal–Organic Framework with Regulable Pore Environments for Efficient Removal of Radioactive Cesium Cations

“…To date, great efforts have been devoted to the exploitation of separation processes for the removal of Cs + , and current approaches mainly include precipitation, , solvent extraction, ,,, and adsorption/ion exchange. − However, chemical precipitation will generate a large amount of radioactive solid waste that is difficult to separate from the water column. The solvent extraction method results in secondary removal due to the ingestion of volatile and toxic organic diluents and modifiers.…”