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<p>Porous materials developed from industrial wastes can be sustainable and cost effective. In this study, a porous Na-zeolite X (NaZX) was converted from Moroccan coal fly ash (CFA) and evaluated for its efficiency in removing Brilliant Green (BG), a widely used cationic dye. Structural and textural properties of NaZX have been studied using various analytical techniques. A pure and selective Na-zeolite X (NaZX) was characterized by a high specific surface area of 443&#xa0;m<sup>2</sup>/g. The adsorption study was conducted under varying conditions including pH, adsorbent dosage, contact time, and initial dye concentration in order to identify the optimal parameters and determine the maximum adsorption capacities. The results show that the adsorption kinetics of BG on the NaZX are very rapid and follow a pseudo-first order model. The adsorption is more efficient at neutral pH, and the isotherms are well described by the Langmuir model. A specific treatment was used to regenerate the adsorbent and the zeolite performance gets maintained after several consecutive cycles. Consequently, NaZX can serve as an efficient adsorbent for eliminating cationic dyes from aqueous solution.</p>

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Adsorptive efficiency of porous NaX-type zeolites converted from industrial waste for the removal of brilliant green dye

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Rkia Zari,
  • Karima Abdelouahdi,
  • Mohammed Monkade,
  • Jean Michel Nunzi,
  • Abdelaziz Laghzizil

摘要

Porous materials developed from industrial wastes can be sustainable and cost effective. In this study, a porous Na-zeolite X (NaZX) was converted from Moroccan coal fly ash (CFA) and evaluated for its efficiency in removing Brilliant Green (BG), a widely used cationic dye. Structural and textural properties of NaZX have been studied using various analytical techniques. A pure and selective Na-zeolite X (NaZX) was characterized by a high specific surface area of 443 m2/g. The adsorption study was conducted under varying conditions including pH, adsorbent dosage, contact time, and initial dye concentration in order to identify the optimal parameters and determine the maximum adsorption capacities. The results show that the adsorption kinetics of BG on the NaZX are very rapid and follow a pseudo-first order model. The adsorption is more efficient at neutral pH, and the isotherms are well described by the Langmuir model. A specific treatment was used to regenerate the adsorbent and the zeolite performance gets maintained after several consecutive cycles. Consequently, NaZX can serve as an efficient adsorbent for eliminating cationic dyes from aqueous solution.