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<p>Many non-conventional and synthetic adsorbents are examined for removing toxic acid dyes from solutions. The main aim of this work is to introduce a screening guide to select the most practical adsorbents for acid dyes. To achieve this aim, the optimum adsorption conditions for acid dye uptake, including adsorbent dosage, pH, contact time, and recycling are gathered. Forty-nine adsorbents of a high binding capacity, 150–4200&#xa0;mg/g, for acid dyes were collected from the literature. The screening guide was based on four criteria: (a) adsorption capacity should be very high; (b) the adsorbent should be used for many cycles; (c) the adsorbent should be efficient at low dosage; and (d) the uptake process should be accomplished in a short time. The results of screening indicated that magnetic-chitosan outperforms other adsorbents with an uptake capacity of 1667&#xa0;mg/g for Acid Violet 19, is usable for three cycles with a final efficiency of 100%, and operates at a low dosage of 0.04&#xa0;g/L. The relationship between adsorption capacity and surface properties of adsorbents, including specific surface area and pore volume, is modest, indicating that the uptake process was not simple; physical and chemical interactions controlled the entire process.</p>

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A Screening Guide for Efficient Acid Dyes Adsorbents

  • 期刊论文

  • 发表日期：

    2025年1月28日

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  • Khaled Al-Zawahreh

摘要

Many non-conventional and synthetic adsorbents are examined for removing toxic acid dyes from solutions. The main aim of this work is to introduce a screening guide to select the most practical adsorbents for acid dyes. To achieve this aim, the optimum adsorption conditions for acid dye uptake, including adsorbent dosage, pH, contact time, and recycling are gathered. Forty-nine adsorbents of a high binding capacity, 150–4200 mg/g, for acid dyes were collected from the literature. The screening guide was based on four criteria: (a) adsorption capacity should be very high; (b) the adsorbent should be used for many cycles; (c) the adsorbent should be efficient at low dosage; and (d) the uptake process should be accomplished in a short time. The results of screening indicated that magnetic-chitosan outperforms other adsorbents with an uptake capacity of 1667 mg/g for Acid Violet 19, is usable for three cycles with a final efficiency of 100%, and operates at a low dosage of 0.04 g/L. The relationship between adsorption capacity and surface properties of adsorbents, including specific surface area and pore volume, is modest, indicating that the uptake process was not simple; physical and chemical interactions controlled the entire process.