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<p>This study investigates the sustainable valorization of Mahogany (<i>Swietenia mahagoni</i>) seed pods as a natural dye source for cotton fabrics, providing a sustainable route that reduces the environmental footprint of textile dyeing. Four eco-friendly biomordants—Arjuna bark, Eucalyptus bark, Khair, and Myrobalan fruit—were evaluated for their ability to enhance color strength and fastness. The dyeing performance of the Exhaust Dyeing (ED) and Cold Pad Batch (CPB) methods was compared. CPB achieved the highest color strength (K/S = 4.5 with Eucalyptus bark) versus 1.5 for the Exhaust method. A 12-hour batching time produced a K/S value of 3.3, closely approximating longer durations while reducing overall processing time and energy use. Color fastness ratings were good to excellent for washing and rubbing (4–5) and moderate for light fastness (3–4), indicating acceptable durability for everyday apparel and home-textile applications. Process comparisons revealed that the natural dyeing approach consumes less energy, generates less waste, and minimizes pollutant emissions. These results confirm that the valorization of Mahogany seed pods combined with plant-based biomordants and CPB dyeing offers a biodegradable, energy-efficient, and scalable alternative for sustainable textile coloration, with a significantly reduced environmental burden compared to conventional synthetic dyeing processes.</p>

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Bio-based Circular Cotton Coloration with Mahogany Seed-pod Extracts and Plant Biomordants via Cold Pad–batch Processing

  • 期刊论文

  • 发表日期：

    2026年2月12日

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  • Mohammad Mohsin Ul Hoque,
  • Md. Ashraful Islam,
  • Toufique Ahmed,
  • Md. Mahabub Hasan,
  • Tazina Shams,
  • Ismatara,
  • Nusrat Jahan Ruma,
  • Md. Fuad Ahmed,
  • Basit Abdul

摘要

This study investigates the sustainable valorization of Mahogany (Swietenia mahagoni) seed pods as a natural dye source for cotton fabrics, providing a sustainable route that reduces the environmental footprint of textile dyeing. Four eco-friendly biomordants—Arjuna bark, Eucalyptus bark, Khair, and Myrobalan fruit—were evaluated for their ability to enhance color strength and fastness. The dyeing performance of the Exhaust Dyeing (ED) and Cold Pad Batch (CPB) methods was compared. CPB achieved the highest color strength (K/S = 4.5 with Eucalyptus bark) versus 1.5 for the Exhaust method. A 12-hour batching time produced a K/S value of 3.3, closely approximating longer durations while reducing overall processing time and energy use. Color fastness ratings were good to excellent for washing and rubbing (4–5) and moderate for light fastness (3–4), indicating acceptable durability for everyday apparel and home-textile applications. Process comparisons revealed that the natural dyeing approach consumes less energy, generates less waste, and minimizes pollutant emissions. These results confirm that the valorization of Mahogany seed pods combined with plant-based biomordants and CPB dyeing offers a biodegradable, energy-efficient, and scalable alternative for sustainable textile coloration, with a significantly reduced environmental burden compared to conventional synthetic dyeing processes.