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<p>Dye contamination is currently a pressing global concern caused by their untreated widespread into water sources. Dyes have adverse impacts on aquatic ecosystems and human health, hence, removal of dyes is required. As a waste-to-wealth approach, herein, the durian fruit shell waste (DFW) was used as a low-cost, locally, and available source for the production of activated carbon (DFW-AC). The effect of KOH concentration (10–30%) was investigated. Moreover, the effect of alizarin red S concentration (25–80&#xa0;mg/L), pH (3.5–9.0), and dosage (0.1–0.5) on removal efficiency of DFW-AC was studied. KOH activation was highly efficient because it has increased the surface area of DFW-AC up to 144 times. Notably, more pores of DFW-AC were observed after KOH activation. For adsorption of ARS, the RSM was applied to predict the optimal adsorption condition such as concentration (25–75&#xa0;mg/L), pH (4–8), dosage (0.2–0.4&#xa0;g/L), time (120–240&#xa0;min). The maximum ARS adsorption capacity using Langmuir equation was 225&#xa0;mg/g. Several mechanisms such as π–π stacking, H bonding, and electrostatic interaction were explained. It is recommended that activated carbon from durian fruit waste can be a good adsorbent for treatment of toxic dyes from water.</p>

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Response surface methodology for optimization of alizarin red S dye removal by carbon-based adsorbents derived from durian fruit shells: a waste-to-wealth approach

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • Giang Thanh Tran,
  • Thuan Van Tran

摘要

Dye contamination is currently a pressing global concern caused by their untreated widespread into water sources. Dyes have adverse impacts on aquatic ecosystems and human health, hence, removal of dyes is required. As a waste-to-wealth approach, herein, the durian fruit shell waste (DFW) was used as a low-cost, locally, and available source for the production of activated carbon (DFW-AC). The effect of KOH concentration (10–30%) was investigated. Moreover, the effect of alizarin red S concentration (25–80 mg/L), pH (3.5–9.0), and dosage (0.1–0.5) on removal efficiency of DFW-AC was studied. KOH activation was highly efficient because it has increased the surface area of DFW-AC up to 144 times. Notably, more pores of DFW-AC were observed after KOH activation. For adsorption of ARS, the RSM was applied to predict the optimal adsorption condition such as concentration (25–75 mg/L), pH (4–8), dosage (0.2–0.4 g/L), time (120–240 min). The maximum ARS adsorption capacity using Langmuir equation was 225 mg/g. Several mechanisms such as π–π stacking, H bonding, and electrostatic interaction were explained. It is recommended that activated carbon from durian fruit waste can be a good adsorbent for treatment of toxic dyes from water.