Photodegradation and extraction study of natural dye from mango and papaya plants using methanol as solvent / Mohd Azfar Daniel Mohd Hazahari

This study uses methanol as a solvent to explore the extraction and conductivity investigation for the photodegradation of natural colours made from plant waste, notably papaya (Carica papaya) and mango (Mangifera indica) leaves. This study's goals are to extract natural dyes from papaya and mango leaves, compare the photodegradation behaviour of the two leaves, and evaluate the conductivity value of the photodegradation process for each leaf. Natural dyes are extracted from both fresh and dry leaves over a period of 1, 3, and 5 days. The conductivity values of the extracted dyes are then measured. The findings show that the first day had the lowest conductivity level for fresh leave but for dry had shown that the fifth day was the lowest value, and the third day had the highest value for both fresh and dry. This pattern implies that additional pigments can be released over extended extraction, resulting in a darker extract and higher conductivity values. The results show that natural dyes may be successfully extracted from plant waste and show promise for additional uses. To improve the effectiveness of natural dye extraction, future studies can investigate stability, resistance to photodegradation, and substitute solvents.