Scholarlink

<p>This study reports the synthesis and application of a novel composite adsorbent based on hydroxyapatite and Florisil (HAP–F), designed for the efficient removal of Methylene Blue (MB, cationic) and Acid Fuchsin (AF, anionic) dyes from aqueous media. Hydroxyapatite was derived from camel bone waste, while Florisil, a porous magnesium silicate, was used to enhance the adsorption capacity. Among the tested ratios, the (50:50) HAP–F composite exhibited the highest removal efficiencies (90.8 ± 0.1% % for MB and 89.9 ± 0.1%for AF) and was selected for detailed analysis. Structural characterization (FTIR, XRD, SEM, BET, XRF) confirmed the formation of a mesoporous hybrid with a large surface area (173.6&#xa0;m²/g), uniform morphology, good crystallinity, and synergistic interactions between components. Adsorption kinetics followed a pseudo-first-order model for MB and a pseudo-second-order model for AF. Langmuir isotherm fitting showed maximum adsorption capacities of 222&#xa0;mg/g for MB and 119.4&#xa0;mg/g for AF, indicating monolayer adsorption on a homogeneous surface. Thermodynamic parameters (ΔG°, ΔH°, ΔS°) revealed that the adsorption process was spontaneous and exothermic. The adsorbent was regenerable over five consecutive cycles using HCl and NaOH as eluents for MB and AF, respectively. Unlike previous studies that focused on individual natural or synthetic adsorbents, this work presents an innovative composite combining biogenic hydroxyapatite and Florisil, two materials never before used together for dye removal. The synergistic interaction between them enhances both adsorption performance and selectivity for cationic and anionic dyes. Furthermore, by utilizing animal bone waste, the HAP–F composite supports waste valorization and offers a sustainable, low-cost, and reusable solution for treating complex dye-laden effluents.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Novel Hydroxyapatite-Florisil Composite Adsorbent for the Removal of Methylene Blue and Acid Fuchsin Dyes

  • 期刊论文

  • 发表日期：

    2025年9月8日

查看全文
  • Amina Belounis,
  • Ali Benouadah,
  • Adhya-eddine Hamitouche,
  • Djalila Boudemagh,
  • Mustapha Mounir Bouhenna,
  • Ehab AlShamailah

摘要

This study reports the synthesis and application of a novel composite adsorbent based on hydroxyapatite and Florisil (HAP–F), designed for the efficient removal of Methylene Blue (MB, cationic) and Acid Fuchsin (AF, anionic) dyes from aqueous media. Hydroxyapatite was derived from camel bone waste, while Florisil, a porous magnesium silicate, was used to enhance the adsorption capacity. Among the tested ratios, the (50:50) HAP–F composite exhibited the highest removal efficiencies (90.8 ± 0.1% % for MB and 89.9 ± 0.1%for AF) and was selected for detailed analysis. Structural characterization (FTIR, XRD, SEM, BET, XRF) confirmed the formation of a mesoporous hybrid with a large surface area (173.6 m²/g), uniform morphology, good crystallinity, and synergistic interactions between components. Adsorption kinetics followed a pseudo-first-order model for MB and a pseudo-second-order model for AF. Langmuir isotherm fitting showed maximum adsorption capacities of 222 mg/g for MB and 119.4 mg/g for AF, indicating monolayer adsorption on a homogeneous surface. Thermodynamic parameters (ΔG°, ΔH°, ΔS°) revealed that the adsorption process was spontaneous and exothermic. The adsorbent was regenerable over five consecutive cycles using HCl and NaOH as eluents for MB and AF, respectively. Unlike previous studies that focused on individual natural or synthetic adsorbents, this work presents an innovative composite combining biogenic hydroxyapatite and Florisil, two materials never before used together for dye removal. The synergistic interaction between them enhances both adsorption performance and selectivity for cationic and anionic dyes. Furthermore, by utilizing animal bone waste, the HAP–F composite supports waste valorization and offers a sustainable, low-cost, and reusable solution for treating complex dye-laden effluents.