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<p>Water pollution by dyes remains an important problem that constantly reduces water quality, creating hazard to aquatic flora and fauna, as well as terrestrial life. Although adsorption has been a favourite technique exploited to remediate this growing menace due to its cost-effectiveness and environmental friendliness, adsorbents remain limited in their capacity to efficiently remove emerging dye contaminants from wastewater. In this work, we present an efficient method to improve the sequestration of an emerging contaminant, methylene blue dye (MB), from water through Fenton-like modification of adsorbents. Low-cost and readily-available <i>Bauhinia tomentosa</i> seedpod (BTSP) was modified with recyclable FeOCl nanosheets to produce Fenton-BTSP adsorbents. The modified and unmodified adsorbents were characterized using Fourier-transform infrared spectroscopy, dynamic light scattering, energy dispersive X-Ray, and scanning electron microscopy. Results showed successful modification of BTSP to form fine agglomerated particles with enhanced surface areas and pore spaces. Adsorption studies revealed optimal adsorption at pH 10, with equilibrium reached in 30&#xa0;min for the adsorbents. Isotherm modelling of the adsorption data suggests formation of multiple layers of MB molecules on the adsorbents at maximum monolayer capacity of 190.63&#xa0;mg/g and 520.83&#xa0;mg/g for BTSP and Fenton-BTSP, respectively. Kinetics modelling revealed chemical interaction between the adsorbents and dye molecules at a rate that is higher for Fenton-BTSP. Adsorbent regeneration was also improved after Fenton-like modification, contributing to the potential of Fenton-BTSP for industrial applications.</p>

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Fenton-like Modification of Bauhinia tomentosa seedpod for Improved Sequestration of Methylene Blue from Water

  • 期刊论文

  • 发表日期：

    2025年10月17日

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  • Michael Tope Agbadaola,
  • Damilola Adeola Akinyemi,
  • Dorcas Abiodun Olatunji,
  • Jonathan Oyebamiji Babalola

摘要

Water pollution by dyes remains an important problem that constantly reduces water quality, creating hazard to aquatic flora and fauna, as well as terrestrial life. Although adsorption has been a favourite technique exploited to remediate this growing menace due to its cost-effectiveness and environmental friendliness, adsorbents remain limited in their capacity to efficiently remove emerging dye contaminants from wastewater. In this work, we present an efficient method to improve the sequestration of an emerging contaminant, methylene blue dye (MB), from water through Fenton-like modification of adsorbents. Low-cost and readily-available Bauhinia tomentosa seedpod (BTSP) was modified with recyclable FeOCl nanosheets to produce Fenton-BTSP adsorbents. The modified and unmodified adsorbents were characterized using Fourier-transform infrared spectroscopy, dynamic light scattering, energy dispersive X-Ray, and scanning electron microscopy. Results showed successful modification of BTSP to form fine agglomerated particles with enhanced surface areas and pore spaces. Adsorption studies revealed optimal adsorption at pH 10, with equilibrium reached in 30 min for the adsorbents. Isotherm modelling of the adsorption data suggests formation of multiple layers of MB molecules on the adsorbents at maximum monolayer capacity of 190.63 mg/g and 520.83 mg/g for BTSP and Fenton-BTSP, respectively. Kinetics modelling revealed chemical interaction between the adsorbents and dye molecules at a rate that is higher for Fenton-BTSP. Adsorbent regeneration was also improved after Fenton-like modification, contributing to the potential of Fenton-BTSP for industrial applications.