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<p><i>Girardinia diversifolia</i> (Link) Friis, a perennial herb belonging to the Urticaceae family, is native to tropical and subtropical regions of Asia and Africa. Despite its common use as a cattle fence due to its venomous stinging hairs, the plant is valued for its medicinal properties, particularly in diuretic and anti-rheumatic applications, as well as for its strong, smooth, and biodegradable bast fiber. This study explores the process variables affecting the extraction of natural dye from the roots of <i>G. diversifolia</i>. The optimal conditions for dye extraction were identified, with higher pH levels and temperatures correlating with increased yield. The UV–Vis spectroscopy of the extracted dye revealed a maximum absorbance at 200&#xa0;nm, while FTIR analysis confirmed the presence of key functional groups, including hydroxyl and carbonyl, which influence the dye’s properties. These findings provide a deeper understanding of the species potential applications, particularly in natural dye production, and underscore the species’ broader utility beyond its traditional uses.</p>

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Optimizing the Extraction Process of Natural Dye from Girardinia diversifolia (Link) Friis Roots Using Response Surface Methodology

  • 期刊论文

  • 发表日期：

    2025年5月25日

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  • Vasundra Sharma,
  • Ritika Jamwal,
  • Harish Chander Dutt

摘要

Girardinia diversifolia (Link) Friis, a perennial herb belonging to the Urticaceae family, is native to tropical and subtropical regions of Asia and Africa. Despite its common use as a cattle fence due to its venomous stinging hairs, the plant is valued for its medicinal properties, particularly in diuretic and anti-rheumatic applications, as well as for its strong, smooth, and biodegradable bast fiber. This study explores the process variables affecting the extraction of natural dye from the roots of G. diversifolia. The optimal conditions for dye extraction were identified, with higher pH levels and temperatures correlating with increased yield. The UV–Vis spectroscopy of the extracted dye revealed a maximum absorbance at 200 nm, while FTIR analysis confirmed the presence of key functional groups, including hydroxyl and carbonyl, which influence the dye’s properties. These findings provide a deeper understanding of the species potential applications, particularly in natural dye production, and underscore the species’ broader utility beyond its traditional uses.