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<p>The adsorptions of various dyes with different molecular weights on MMF with the high surface area were investigated. It was found that the adsorption capacity of acid yellow 17 dye (452 mg/g) was much higher than that of neutral red 5 dye (74 mg/g) and basic methylene blue dye (6.9 mg/g) on MMF. Thus, the MMF is expected to become a new type of high-efficient adsorbent for the treatment of wastewater containing acid dyes. The results of adsorption of benzenesulfonic acid, sodium benzenesulfonate, sodium benzoate and propionic acid on MMF showed that the adsorption capacity of sulfonic group was much higher than that of benzene ring and carboxyl group on MMF. The results of IR spectroscopy indicated that the adsorption of acid dye molecules onto the surface of MMF mainly occurred via the strong electrostatic interaction between the sulfonic groups in acid dye molecules and the protonated amines on the surface of MMF. In addition, the pH value also affected the adsorption of the acid dyes on MMF, leading to a significant decrease of the adsorption capacity under strong alkaline (pH&gt; 9) conditions.</p>

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Adsorption study of the acid dyes on the mesoporous melamine formaldehyde resin

  • 期刊论文

  • 发表日期：

    2026年6月1日

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  • Huapeng Cui,
  • Li Yan,
  • Naijin Xing,
  • Hui Chen

摘要

The adsorptions of various dyes with different molecular weights on MMF with the high surface area were investigated. It was found that the adsorption capacity of acid yellow 17 dye (452 mg/g) was much higher than that of neutral red 5 dye (74 mg/g) and basic methylene blue dye (6.9 mg/g) on MMF. Thus, the MMF is expected to become a new type of high-efficient adsorbent for the treatment of wastewater containing acid dyes. The results of adsorption of benzenesulfonic acid, sodium benzenesulfonate, sodium benzoate and propionic acid on MMF showed that the adsorption capacity of sulfonic group was much higher than that of benzene ring and carboxyl group on MMF. The results of IR spectroscopy indicated that the adsorption of acid dye molecules onto the surface of MMF mainly occurred via the strong electrostatic interaction between the sulfonic groups in acid dye molecules and the protonated amines on the surface of MMF. In addition, the pH value also affected the adsorption of the acid dyes on MMF, leading to a significant decrease of the adsorption capacity under strong alkaline (pH> 9) conditions.