Effective natural dye extraction from different plant materials using ultrasound

Dyes derived from natural sources have emerged as an important alternative to synthetic dyes. Therefore, there is a need for developing better solid-liquid extraction techniques for leaching natural colorants from plant materials for applications in plant research, food as well as dyeing industries. The influence of ultrasound on natural colorant extraction from different potential dye yielding plant materials has been studied in comparison with magnetic stirring process as control. The color yielding plant materials used in the present study include Green wattle bark, Marigold flowers, Pomegranate rinds, 4'o clock plant flowers and Cocks Comb flowers. Analytical studies such as UV-VIS spectrophotometry and gravimetric analysis were performed on the extract. The results indicate there is a significant 13-100% improvement in the extraction efficiency of the colorant obtained from different plant materials due to the use of ultrasound. Therefore, this methodology could be employed for extracting coloring materials from plant materials in a faster and effective manner.

Research highlights▶ The paper focus on dyes derived from natural sources, which have emerged as an important alternative to synthetic dyes. ▶ The research fulfills the need for developing better solid-liquid extraction techniques for leaching natural colorants from plant materials for applications in plant research, food as well as dyeing industries. ▶ The study mainly deals with influence of ultrasound on natural dye extraction from different potential dye yielding plant materials in comparison with magnetic stirring process as control. ▶ The color yielding plant materials chosen for the present study include Green wattle bark, Marigold flowers, Pomegranate rinds, 4'o clock plant flowers and Cocks Comb flowers. ▶ The study comprises of analytical studies such as UV-VIS spectrophotometry and gravimetric analysis were performed on the extract. ▶ The results indicate there is a significant 13-100% improvement in the extraction efficiency of the colorant obtained from different plant materials due to the use of ultrasound. ▶ This novel technique can be employed effectively for the extraction of coloring matter from various plant resources even dispensing with conventional heating requirements. ▶ This process provides effective utilization of natural resources as eco-friendly method in current situation of global environmental concern.