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Studies on Natural Dye (Pelargonidin) Extraction from Onion Peel and Application in Dyeing of Leather

	International Journal of Recent Engineering Science (IJRES)
	© 2020 by IJRES Journal
	Volume-7 Issue-1
	Year of Publication : 2020
	Authors : Resmi Mohan, N. Geetha, D. Haritha Jennifer, Venkatasubramanian Sivakumar
	DOI :    10.14445/23497157/IJRES-V7I1P103

Citation 

MLA Style :Resmi Mohan, N. Geetha, D. Haritha Jennifer, Venkatasubramanian Sivakumar "Studies on Natural Dye (Pelargonidin) Extraction from Onion Peel and Application in Dyeing of Leather" International Journal of Recent Engineering Science 7.1(2020):12-16. 

APA Style :Resmi Mohan, N. Geetha, D. Haritha Jennifer, Venkatasubramanian Sivakumar. Studies on Natural Dye (Pelargonidin) Extraction from Onion Peel and Application in Dyeing of Leather  International Journal of Recent Engineering Science, 7(1),12-16.

Abstract
In recent times, synthetic dyes are more widely used than natural dyes. However, natural dyes are eco-benign and harmless. In the growing demand for eco-friendly coloring agents in process industries such as food, textiles, leather, and others, natural dyes have high potential. The manufacture and the use of the same necessitate better raw materials and processing methods. These natural dyes could also be obtained from waste vegetable materials such as peels, shells, seeds. The sources were pomegranate peels, onion peels, leaves of eucalyptus, walnut husks, peanut shells, strawberries, indigo seeds, sunflower seeds. India is the second-largest onion producer globally, and about 2.3 to 4.5 Million Tonnes of onion peels are produced per year in India. The peels of onions provide a prosperous source of plant compounds called flavonoids, and a dye named Pelargodinin can also be obtained. The dye extraction was carried out by using acetic acid (10% solution) and compared with water-based extraction. The yield of natural dyes from onion peel has been analyzed using UV-VIS spectroscopy. Extraction using water gave a dark red dye. Acetic acid extraction yielded a dark pink dye. UV-VIS spectrometry and gravimetric analysis have been done for each dye extracted. Percentage Extract Yield of Dye is 20% and 23.3%, respectively, for the water and acetic acid-based extraction processes. A piece of leather was also dyed using Pelargonidin dye obtained from Onion peel, extracted using acetic acid, and useful. In this regard, the present paper, practical use of these Onion peels for a beneficial purpose such as Natural Dye extraction has been studied as viable Development of Eco-benign products from Agricultural waste material.

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Keywords
Leather, Natural Dyes, Pelargonidin dye, Onion Peel extract, Eco-benign, Eco-friendly, Leather Dyeing, Cleaner processing.