Radiation synthesis of starch-acrylic acid–vinyl sulfonic acid/multiwalled carbon nanotubes composite for the removal of 134Cs and 152+154Eu from aqueous solutions

Adsorption of 60Co and 154+152Eu using graft copolymer of starch-polyacrylic acid-polyvinylsulfonic acid

“…This irregular morphology is caused by exposure to heat during the produce of the graft copolymer. Rough surfaces of the graft copolymer lead to enhancement of its surface area and increase the interaction between the adsorbent and the radionuclides and decrease the diffusion limitations in radionuclides adsorption [10].…”

“…Intraparticle diffusion models were applied to examine the adsorption kinetic behavior of Co(II) and Eu(III) radionuclides. The linearized equations of the models can be expressed as in Table 1 [10,13,16].…”

“…Polyacrylic acid (PAA) is a high-absorbency polymer that can absorb and retain water while swelling to many times its original volume. It has been employed in water treatment as a result of this unique property [5,7,[9][10][11]. Polyvinylsulfonic acid (PVSA) (as sodium salt) is a polyelectrolyte with negatively charged sulfonate groups.…”

“…These polymers are employed as photoresists and ion-conductive polymer electrolyte membranes for fuel cells in the industry. Polyvinylsulfonic acid, for example, can be used to make translucent membranes with high ion exchange capacity and proton conductivity [5,7,[9][10][11][12][13].…”

“…Unfortunately, these technologies' generality is expensive and/ or environmentally unfriendly. Adsorption has been popular as a method for eliminating radionuclides because of its many bene ts, including high e ciency, environmental friendliness, and low cost [10,[14][15][16][17]. The goal of this research is to develop and test a low-cost starch-grafted poly(acrylic acid-vinylsulfonic acid) (St-g-PAA-PVSA) graft co polymer for removing Co(II) and Eu(III) from radioactive waste under various experimental settings.…”