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<p>Herein, a sustainable biomaterial (hereinafter, CTO/MP-SA) of chitosan/chemically modified mango (<i>Mangifera indica</i> L.) peel using sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) was produced to be an efficient adsorbent material for dye removal (safranin O, SAF-O) from aquatic environments. The chitosan/biomass composite (CTO/MP-SA) was characterized using elemental analysis (CHNS-O), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, Fourier transform infrared spectroscopy (FT-IR), and field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FESEM-EDX). Three adsorption factors including (A) CTO/MP-SA dosage (0.02–0.08&#xa0;g), (B) pH (4–10), and duration (C) (10–40&#xa0;min) were investigated using response surface methodology (RSM) on SAF-O dye adsorption. The SAF-O adsorption by CTO/MP-SA could be well described by the isotherms and adsorption kinetics confirming Freundlich and pseudo-first-order kinetic models. The desirability function approach identified ideal circumstances for SAF-O dye removal: an adsorbent dose of 0.057&#xa0;g, a pH of about 10, and a contact period of 30.8&#xa0;min, resulting in a maximum efficiency of 90.2%. The CTO/MP-SA composite displayed 541.46&#xa0;mg/g as its highest adsorption capability towards SAF-O dye. The mechanisms for SAF-O dye adsorption onto CTO/MP-SA composite were electrostatic interaction, hydrogen bonding, and n-π stacking interaction. The outcomes of this investigation show that the CTO/MP-SA is a useful bio-adsorbent that can be deployed to treat high-strength dye wastewater. The results obtained demonstrate a sustainable and ecologically friendly approach to producing chitosan/biomass composite adsorbents for the removal of cationic dyes from contaminated water.</p>

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Chitosan polymer-loaded chemically treated mango (Mangifera indica L.) peel biomass for the adsorption of safranin O dye using Box-Behnken design

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Ahmed Saud Abdulhameed,
  • Samaa Abdullah,
  • Alaa A. Al-Masud,
  • Mahmoud Abualhaija,
  • Sameer Algburi

摘要

Herein, a sustainable biomaterial (hereinafter, CTO/MP-SA) of chitosan/chemically modified mango (Mangifera indica L.) peel using sulfuric acid (H2SO4) was produced to be an efficient adsorbent material for dye removal (safranin O, SAF-O) from aquatic environments. The chitosan/biomass composite (CTO/MP-SA) was characterized using elemental analysis (CHNS-O), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, Fourier transform infrared spectroscopy (FT-IR), and field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FESEM-EDX). Three adsorption factors including (A) CTO/MP-SA dosage (0.02–0.08 g), (B) pH (4–10), and duration (C) (10–40 min) were investigated using response surface methodology (RSM) on SAF-O dye adsorption. The SAF-O adsorption by CTO/MP-SA could be well described by the isotherms and adsorption kinetics confirming Freundlich and pseudo-first-order kinetic models. The desirability function approach identified ideal circumstances for SAF-O dye removal: an adsorbent dose of 0.057 g, a pH of about 10, and a contact period of 30.8 min, resulting in a maximum efficiency of 90.2%. The CTO/MP-SA composite displayed 541.46 mg/g as its highest adsorption capability towards SAF-O dye. The mechanisms for SAF-O dye adsorption onto CTO/MP-SA composite were electrostatic interaction, hydrogen bonding, and n-π stacking interaction. The outcomes of this investigation show that the CTO/MP-SA is a useful bio-adsorbent that can be deployed to treat high-strength dye wastewater. The results obtained demonstrate a sustainable and ecologically friendly approach to producing chitosan/biomass composite adsorbents for the removal of cationic dyes from contaminated water.