Synthesis, Characterization and Ion Exchange Properties of a New Composite of Inorganic Ion Exchanger: Polyacrylonitrile Cerium(IV) Molybdophosphate

Abstract

In this work, the synthesis of the composite of cerium(IV) molybdophosphate (CMP) and polyacrylonitrile (PAN) was reported (CMP-PAN). The material has been characterized by elemental and spectral (FT-IR), X-ray and thermal (TGA) analysis. Also the size analysis of the composite was done by scanning electron microscopy (SEM). Its chemical stability in acidic, basic and saline solutions and radiation stability up to 100 kGy total expose dose were assessed. Whereas the synthesized composite has ion exchange properties, its ion exchange capacity and behavior toward several metal ions were also investigated. Further, the distribution coefficients of the metal ions were calculated. Finally, the ability of the synthesized CMP-PAN composite for the decontamination of low level liquid waste (LLLW) was investigated.

Evaluation of Polyethersulfone‐based Composite for Selective Separation of Cesium from Acidic Media

“…Approximately 2-6 wt % Mo + was leached out of the AMP embedded in the PES in varied acidities, especially during the sorption and washing steps. 21,23 The leaching became stronger with acidity due to weakening of intermolecular interactions in the polymer support. In contrast, we did not observe any major loss of Mo + during the recovery procedures ( Figure S5).…”

“…The gradual weight loss in the range of 250-450 C is associated with the loss of interstitial water molecules and hydroxyl groups, as well as the condensation of phosphate to pyrophosphate in AMP. 23 The decomposition of the PES support was observed under a broad range of temperatures from 450 C. Batch Studies. The batch distribution coefficient (K d ) typically defines the efficiency of Cs + -adsorbents.…”

“…5,16,21,22 On the other hand, studies on newly-developed composites have mainly focused on their Cs + -sorption capacities. 18,[23][24][25] While the sorption properties are strongly correlated with effective treatment of a radionuclide-contaminated environment, it is also important to examine Cs + -recovery behaviors from the composites for the following reasons. First, one can prevent the local elevation in radioactivity induced by the accumulation of radiocesium onto the adsorbent.…”

“…Especially, the performance of AMP‐PAN in the sorption and recovery of cesium has been most widely studied for different purposes . On the other hand, studies on newly‐developed composites have mainly focused on their Cs + ‐sorption capacities . While the sorption properties are strongly correlated with effective treatment of a radionuclide‐contaminated environment, it is also important to examine Cs + ‐recovery behaviors from the composites for the following reasons.…”

Preparation, characterization, and properties of polyacrylonitrile–silica gel anion exchange composite fibers

“…Organic–inorganic ion‐exchange composite materials have the advantages of light weight, flexibility, and mechanical stability because of organic polymer, whereas inorganic part provides thermal stability and inorganic matrices of co‐ions for exchangeable counter ions. Such composite materials have excellent ion‐exchange behavior and also can be used in separation of toxic metal ions and in electroanalytical applications [1–7]. Electrical conducting behavior was an additional advantage of such materials; thus, electrically conducting composite cation exchangers were developed as new class of advance materials [8–10].…”