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<p>Various pollutants, especially drug production and consumption effluents, cause water pollution that harmfully affects human health. In the present study, cellulose was successfully extracted from corn husks and magnetized by Fe<sub>3</sub>O<sub>4</sub>. The as-synthesized magnetic cellulose was modified with Al-SAMOF to enhance maximum adsorption capacity and used to remove methotrexate (MTX) in an aquatic environment. Al-SAMOF has Al<sup>3+</sup> metal ions that are linked to each other through the oxygen atoms of succinic acid. The parameters influencing adsorption capacity were optimized employing the Taguchi method. At the optimal conditions; pH = 6, initial concentration of 60 ppm, adsorbent dose of 2.5&#xa0;g/L, and 80&#xa0;min, 95% of MTX was adsorbed on M-Cellulose/Al-SAMOF adsorbent. The isotherm and kinetic analysis indicated that the adsorption of MTX on M-Cellulose/Al-SAMOF is well fitted with Freundlich model and Pseudo-second order rate law, respectively. Additionally, the modeling predicted the maximum adsorption capacity of the adsorbent to be 147.05&#xa0;mg/g. However, the thermodynamics assessments presented that the adsorption process of MTX is spontaneous and exothermic, along with a decrease in enthalpy level. Furthermore, investigations into adsorption-desorption cycles revealed that the as-prepared adsorbent has good stability over seven cycles without decreasing performance. In real wastewater applications, this MOF-modified bio-composite can be a superior adsorbent for removing pharmaceutical effluents, which can be achieved to 93% in optimal conditions.</p>

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Development of a Green Cellulose-based Adsorbent Derived from Corn Husk for the Efficient Removal of Methotrexate from Aqueous Solutions: A Sustainable Approach to Water and Wastewater Treatment

  • 期刊论文

  • 发表日期：

    2025年5月20日

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  • Alireza Hazrati,
  • Ramin Saeedi,
  • Mehdi Barzegarzadeh,
  • Mohammad Sadegh Amini-Fazl

摘要

Various pollutants, especially drug production and consumption effluents, cause water pollution that harmfully affects human health. In the present study, cellulose was successfully extracted from corn husks and magnetized by Fe3O4. The as-synthesized magnetic cellulose was modified with Al-SAMOF to enhance maximum adsorption capacity and used to remove methotrexate (MTX) in an aquatic environment. Al-SAMOF has Al3+ metal ions that are linked to each other through the oxygen atoms of succinic acid. The parameters influencing adsorption capacity were optimized employing the Taguchi method. At the optimal conditions; pH = 6, initial concentration of 60 ppm, adsorbent dose of 2.5 g/L, and 80 min, 95% of MTX was adsorbed on M-Cellulose/Al-SAMOF adsorbent. The isotherm and kinetic analysis indicated that the adsorption of MTX on M-Cellulose/Al-SAMOF is well fitted with Freundlich model and Pseudo-second order rate law, respectively. Additionally, the modeling predicted the maximum adsorption capacity of the adsorbent to be 147.05 mg/g. However, the thermodynamics assessments presented that the adsorption process of MTX is spontaneous and exothermic, along with a decrease in enthalpy level. Furthermore, investigations into adsorption-desorption cycles revealed that the as-prepared adsorbent has good stability over seven cycles without decreasing performance. In real wastewater applications, this MOF-modified bio-composite can be a superior adsorbent for removing pharmaceutical effluents, which can be achieved to 93% in optimal conditions.