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<p>In this study, a polymer material containing a new functional group was developed to remove uranyl ions from aqueous media. This new polymer composite (PS-PAA) was created by adding Ponceau S (PS) dye to the polyacrylamide (PAA) hydrogel structure. The adsorption capacity from the Langmuir model was 0.0976 mol kg<sup>−1</sup>, and the PSO model's rate constant was 6.372 mol kg<sup>−1</sup> min<sup>−1</sup>. Thermodynamic studies showed that the adsorption process is spontaneous, endothermic, and with increasing entropy. These results indicate that the synthesized polymer adsorbent can be a sustainable and effective alternative for environmental applications, particularly in wastewater treatment.</p>

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Investigation of synthesis and characterization of ponceau S-decorated chelating hydrogel for adsorption of uranyl ions from aqueous solution

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Selçuk Şimşek,
  • Zeynep Mine Şenol

摘要

In this study, a polymer material containing a new functional group was developed to remove uranyl ions from aqueous media. This new polymer composite (PS-PAA) was created by adding Ponceau S (PS) dye to the polyacrylamide (PAA) hydrogel structure. The adsorption capacity from the Langmuir model was 0.0976 mol kg−1, and the PSO model's rate constant was 6.372 mol kg−1 min−1. Thermodynamic studies showed that the adsorption process is spontaneous, endothermic, and with increasing entropy. These results indicate that the synthesized polymer adsorbent can be a sustainable and effective alternative for environmental applications, particularly in wastewater treatment.