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<p>Dye-laden wastewater from the textile industry is a significant environmental concern in developing nations. This study investigates the adsorption of Reactive Yellow 160 (RY-160) dye from a synthetic solution using acid-activated sugar cane bagasse ash (SCBA). The natural and acid-activated SCBA were characterized using BET, XRD, SEM, and FTIR techniques. The effects of initial dye concentration, adsorbent dosage, contact time, and solution pH on the adsorption and removal of RY-160 dye were evaluated. Kinetic and isotherm models were also examined to assess the adsorption rate and capacity. The specific surface area (SSA) both natural and acid-activated SCBA are 5.2m<sup>2</sup>/g and 31.8m<sup>2</sup>/respectively. An 86% removal efficiency of RY-160 was achieved under optimal conditions: an initial dye concentration of 20&#xa0;mg/L, an adsorbent dosage of 3.5&#xa0;g/L, a contact time of 120&#xa0;min, and a pH of 1. Experimental data (R<sup>2</sup>) indicated that the adsorption process followed the pseudo-second-order kinetic model and was well represented by the Langmuir isotherm model. The study also explored the desorption and reusability of the adsorbent. Overall, acid-activated SCBA demonstrates significant potential as an eco-friendly and cost-effective adsorbent for the removal of dyes from wastewater. Acid-activation substantially improves both the surface area and the dye adsorption capacity of the adsorbent.</p>

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Adsorption of Reactive Yellow 160 Dyes from Aqueous Solution Using Acid-Activated Sugar Cane Bagasse Ash

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Teshale Adane,
  • Limenew Abate Worku,
  • Rakesh Kumar Bachheti

摘要

Dye-laden wastewater from the textile industry is a significant environmental concern in developing nations. This study investigates the adsorption of Reactive Yellow 160 (RY-160) dye from a synthetic solution using acid-activated sugar cane bagasse ash (SCBA). The natural and acid-activated SCBA were characterized using BET, XRD, SEM, and FTIR techniques. The effects of initial dye concentration, adsorbent dosage, contact time, and solution pH on the adsorption and removal of RY-160 dye were evaluated. Kinetic and isotherm models were also examined to assess the adsorption rate and capacity. The specific surface area (SSA) both natural and acid-activated SCBA are 5.2m2/g and 31.8m2/respectively. An 86% removal efficiency of RY-160 was achieved under optimal conditions: an initial dye concentration of 20 mg/L, an adsorbent dosage of 3.5 g/L, a contact time of 120 min, and a pH of 1. Experimental data (R2) indicated that the adsorption process followed the pseudo-second-order kinetic model and was well represented by the Langmuir isotherm model. The study also explored the desorption and reusability of the adsorbent. Overall, acid-activated SCBA demonstrates significant potential as an eco-friendly and cost-effective adsorbent for the removal of dyes from wastewater. Acid-activation substantially improves both the surface area and the dye adsorption capacity of the adsorbent.