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<p>The increasing contamination of water bodies by crystal violet (CV) dye, a toxic and carcinogenic pollutant, necessitates the development of effective and sustainable remediation technologies. This study explores <i>Cannabis sativa</i> L<i>.</i> leaves powder (CSLP) as a low-cost, eco-friendly biosorbent for CV dye removal from aqueous media. Batch adsorption experiments were performed to evaluate the influence of various parameters. Under optimized conditions (pH 11, initial dye concentration of 40&#xa0;mg L⁻<sup>1</sup>, contact time of 25&#xa0;min, and 10&#xa0;mg biosorbent dose), a high removal efficiency of 96.41% was achieved. Adsorption kinetics followed the pseudo-second-order model, suggesting chemisorption, while equilibrium data best fit the Langmuir isotherm, indicating monolayer adsorption with a maximum capacity of 558.7&#xa0;mg&#xa0;g⁻<sup>1</sup>. Thermodynamic analysis confirmed the spontaneous and exothermic nature of the sorption process. CSLP showed excellent reusability over five cycles, with dye removal efficiency slightly declining from 95.69% to 92.96%, demonstrating its durability and cost-effectiveness. These findings establish CSLP as a promising, renewable, and scalable biosorbent for dye-contaminated wastewater treatment, contributing to sustainable water purification technologies.</p>

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Cannabis Sativa L. Leaves Powder as an Effective Biosorbent for the Elimination of Precarious Crystal Violet Dye from Aqueous Solution

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Salma Gul,
  • Nadeem Raza,
  • Sana Gul,
  • Hajera Gul,
  • Shahid Afridi,
  • Lotfi Khezami,
  • Mohamed A. Habib,
  • Anouar Hajjaji,
  • Abdelmonaim Azzouz

摘要

The increasing contamination of water bodies by crystal violet (CV) dye, a toxic and carcinogenic pollutant, necessitates the development of effective and sustainable remediation technologies. This study explores Cannabis sativa L. leaves powder (CSLP) as a low-cost, eco-friendly biosorbent for CV dye removal from aqueous media. Batch adsorption experiments were performed to evaluate the influence of various parameters. Under optimized conditions (pH 11, initial dye concentration of 40 mg L⁻1, contact time of 25 min, and 10 mg biosorbent dose), a high removal efficiency of 96.41% was achieved. Adsorption kinetics followed the pseudo-second-order model, suggesting chemisorption, while equilibrium data best fit the Langmuir isotherm, indicating monolayer adsorption with a maximum capacity of 558.7 mg g⁻1. Thermodynamic analysis confirmed the spontaneous and exothermic nature of the sorption process. CSLP showed excellent reusability over five cycles, with dye removal efficiency slightly declining from 95.69% to 92.96%, demonstrating its durability and cost-effectiveness. These findings establish CSLP as a promising, renewable, and scalable biosorbent for dye-contaminated wastewater treatment, contributing to sustainable water purification technologies.