Eco-Friendly Valorization and Utilization of Plant Waste as a Source of Tannin for Leather Tanning

In the present study, bark, which is waste part of a tree, was utilized as source tannin for leather tanning after its value addition. The barks Acacia nilotica L. and Eucalyptus globulus, are abundantly available in Pakistan, were selected this study. Different extraction techniques including mechanical, soxhlet, reflux ultrasonic used from barks. medium included aqueous well different solvent mixtures ratios. study methanol-water acetone–water. methanol–water ratio kept (50:50) acetone–water maintained at (50:50 70:30). first step, process optimized time by taking fixed dose (5 g) each bark volume extracting mixture (150 mL). total phenolic contents (TPC) extracts determined colorimetric assay (as mg GAE/g bark), gallic acid reference standard. (TC) using standard hide powder method (SLC 117). It concluded that among techniques, (70:30), resulted maximum (196.1 125.2 mg/g), respectively A. E. globulus. FTIR analyses dried obtained both compared with most commonly commercial vegetable agent industry, i.e., mimosa. Results comparable, confirmed presence condensed extracted applied on pickle wet blue to evaluate re-tanning capability. Mimosa, material same comparison. physical properties, such shrinkage temperature, softness, tensile strength, percent elongation breaking measured efficacy tannins. results showed comparable properties those locally nilotica, can be industry.