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<p>The main source of the significant environmental problem of pesticide pollution in wastewater is the widespread use of these chemicals in agriculture. This study emphasizes creating three effective adsorbents, potassium carrageenan (CA), flaxseed mucilage powder (FM), and composite of flaxseed mucilage/carrageenan beads (FMC), with strong adsorption abilities to remove the organophosphorus pesticide chlorpyrifos from wastewater. The fabricated adsorbents were assessed employing a diversity of physicochemical techniques. Physicochemical tools revealed that FMC had an appropriate surface area of 44.6 m<sup>2</sup> g<sup>−1</sup>, a mesoporous nature (2.9&#xa0;nm as pore diameter), acceptable thermal stability, and various functional groups on its surface that originated. The optimal adsorption conditions were identified at a temperature of 15 °C, adsorption time of 90&#xa0;min, initial solution pH 6, and solid dose of 3&#xa0;g L<sup>−1</sup> with maximum adsorption capacity of 189.19 mg g<sup>−1</sup>. Different mathematical models were implemented to evaluate isothermal, thermodynamic, and kinetic parameters, conveying that the adsorption on all solid adsorbents follows a pseudo-second order mechanism, spontaneous, exothermic, and physisorption. After eight rounds of adsorption/desorption, the adsorption potential of CA, FM, and FMC reduced by 8.9%, 12.7%, and 4.1%, respectively. This study highlights the efficacy of the fabricated flaxseed mucilage/carrageenan for the effective and large-scale pesticide removal in polluted water bodies.</p>

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A novel flaxseed mucilage/carrageenan composite beads for advanced adsorption of chlorpyrifos: kinetic, thermodynamic, and sustainability studies

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Hana M. Abumelha,
  • Nadiyah M. Alshammari,
  • Abdulrhman M. Alsharari,
  • Marwah A. Alsharif,
  • Ali A. Keshk,
  • Ali Sayqal,
  • Ameena M. Al-Bonayan,
  • Nashwa M. El-Metwaly

摘要

The main source of the significant environmental problem of pesticide pollution in wastewater is the widespread use of these chemicals in agriculture. This study emphasizes creating three effective adsorbents, potassium carrageenan (CA), flaxseed mucilage powder (FM), and composite of flaxseed mucilage/carrageenan beads (FMC), with strong adsorption abilities to remove the organophosphorus pesticide chlorpyrifos from wastewater. The fabricated adsorbents were assessed employing a diversity of physicochemical techniques. Physicochemical tools revealed that FMC had an appropriate surface area of 44.6 m2 g−1, a mesoporous nature (2.9 nm as pore diameter), acceptable thermal stability, and various functional groups on its surface that originated. The optimal adsorption conditions were identified at a temperature of 15 °C, adsorption time of 90 min, initial solution pH 6, and solid dose of 3 g L−1 with maximum adsorption capacity of 189.19 mg g−1. Different mathematical models were implemented to evaluate isothermal, thermodynamic, and kinetic parameters, conveying that the adsorption on all solid adsorbents follows a pseudo-second order mechanism, spontaneous, exothermic, and physisorption. After eight rounds of adsorption/desorption, the adsorption potential of CA, FM, and FMC reduced by 8.9%, 12.7%, and 4.1%, respectively. This study highlights the efficacy of the fabricated flaxseed mucilage/carrageenan for the effective and large-scale pesticide removal in polluted water bodies.