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<p>In this research work, a biosorbent was developed by ceric ion-initiated grafting of polyvinyl alcohol onto agricultural waste-derived cellulose and collagen-based hybrid backbone using N, N′-methylene bisacrylamide as a crosslinker. The optimization of the biosorbent was validated through response surface methodology focusing on the percentage grafting and characterized using various techniques. The efficacy of the fabricated adsorbent for removing uranyl ions from aqueous samples was investigated, revealing promising results. The optimum conditions for uranium removal using the synthesized semi-IPN were determined as follows: contact time = 180&#xa0;min, pH = 6.0, initial U(VI) ion concentration = 100&#xa0;µg/L, adsorbent dose = 0.125&#xa0;g/25&#xa0;mL and temperature = 333.15&#xa0;K. The data of adsorption was analysed using different isotherm models like Langmuir, Freundlich and Temkin models, showing robust agreement with the Langmuir isotherm and indicating a maximum adsorption capacity of 80.192&#xa0;µg/g. Furthermore, kinetic studies employing two different equations demonstrated a good fit with the pseudo-2nd-order model (<i>R</i><sup>2</sup> = 0.999). Thermodynamic parameters indicated a spontaneous and endothermic process. Desorption and recyclability studies highlighted the biosorbent’s excellent recycling performance and reusability. Overall, the fabricated biosorbent shows a great promise as a cost-effective, eco-friendly, bio-compatible material for uranium extraction from contaminated water, thus, offering a sustainable method to transform waste into wealth. This study offers a sustainable and advanced approach to uranium removal from wastewater by developing a novel biosorbent made from wheat straw-derived cellulose and collagen. The optimized semi-IPN synthesis ensures high adsorption efficiency, addressing radioactive contamination in drinking water, promoting the valorisation of agricultural waste and advancing environmental remediation technologies.</p> Graphical Abstract <p></p>

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Development of a biowaste-derived cellulose/collagen-based adsorbent for the efficient sequestration of uranium from contaminated water

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Himani Sharma,
  • Balbir Singh Kaith,
  • Rakesh Kumar,
  • Rohit Mehra,
  • Manpreet Singh Bhatti

摘要

In this research work, a biosorbent was developed by ceric ion-initiated grafting of polyvinyl alcohol onto agricultural waste-derived cellulose and collagen-based hybrid backbone using N, N′-methylene bisacrylamide as a crosslinker. The optimization of the biosorbent was validated through response surface methodology focusing on the percentage grafting and characterized using various techniques. The efficacy of the fabricated adsorbent for removing uranyl ions from aqueous samples was investigated, revealing promising results. The optimum conditions for uranium removal using the synthesized semi-IPN were determined as follows: contact time = 180 min, pH = 6.0, initial U(VI) ion concentration = 100 µg/L, adsorbent dose = 0.125 g/25 mL and temperature = 333.15 K. The data of adsorption was analysed using different isotherm models like Langmuir, Freundlich and Temkin models, showing robust agreement with the Langmuir isotherm and indicating a maximum adsorption capacity of 80.192 µg/g. Furthermore, kinetic studies employing two different equations demonstrated a good fit with the pseudo-2nd-order model (R2 = 0.999). Thermodynamic parameters indicated a spontaneous and endothermic process. Desorption and recyclability studies highlighted the biosorbent’s excellent recycling performance and reusability. Overall, the fabricated biosorbent shows a great promise as a cost-effective, eco-friendly, bio-compatible material for uranium extraction from contaminated water, thus, offering a sustainable method to transform waste into wealth. This study offers a sustainable and advanced approach to uranium removal from wastewater by developing a novel biosorbent made from wheat straw-derived cellulose and collagen. The optimized semi-IPN synthesis ensures high adsorption efficiency, addressing radioactive contamination in drinking water, promoting the valorisation of agricultural waste and advancing environmental remediation technologies.

Graphical Abstract