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<p>A new approach for transforming nejayote, a by-product of nixtamalization, into highly efficient adsorbents is presented. The resulting activated carbons exhibit high surface areas (up to 797 m<sup>2</sup>/g) and mesoporous structures, as well as high adsorption capacities for organic dyes: 195&#xa0;mg/g for rhodamine B and 280&#xa0;mg/g for methylene blue, which are comparable to or higher than those reported for other biomass-derived carbons. The adsorption data, collected <i>in situ</i>, fit well with the Langmuir isotherm model and follow pseudo-second-order kinetics. This eco-friendly approach not only decreases waste but also results in valuable materials for water and air purification.</p> Graphical abstract <p></p>

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Sustainable synthesis of activated carbon from nejayote for efficient dye adsorption: A kinetic and isotherm evaluation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月3日

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  • Eduardo Arenas-Sánchez,
  • Omar Loredo-Loredo,
  • Ana Laura Ruiz-Castillo,
  • Elena Smolentseva,
  • Brenda Acosta

摘要

A new approach for transforming nejayote, a by-product of nixtamalization, into highly efficient adsorbents is presented. The resulting activated carbons exhibit high surface areas (up to 797 m2/g) and mesoporous structures, as well as high adsorption capacities for organic dyes: 195 mg/g for rhodamine B and 280 mg/g for methylene blue, which are comparable to or higher than those reported for other biomass-derived carbons. The adsorption data, collected in situ, fit well with the Langmuir isotherm model and follow pseudo-second-order kinetics. This eco-friendly approach not only decreases waste but also results in valuable materials for water and air purification.

Graphical abstract