Extraction and Characterization of Natural Dye from Green Walnut Shells and Its Use in Dyeing Polyamide: Focus on Antibacterial Properties

Table 2

Reduction percentage of E. coli and S. aureus in different conditions (each experiment was repeated five times).

The extracted walnut concentration (O.W.F.%)	Reduction percent (𝑅% ± SD)
	S. aureus				E. coli
	Cupric sulfate	Ferric sulfate	Potash alum	Without mordant	Cupric sulfate	Ferric sulfate	Potash alum	Without mordant
1%	75.27±1	80.05±1	74.11±1	74.57±4	96.38±0.2	91.19±1	83.07±2.5	40.63±7
3%	86.66±1	93.07±1	84.19±2	81.91±3	97.47±0.1	96.07±1	95.35±1	75.91±3
5%	89.29±2	98±0.5	96.61±1	97.17±1	99.94±0.1	98±1	96.52±1	90.75±0.5
10%	96.85±1	100±0	97.53±0.5	97.47±1	100±0	99±0.2	97.91±0.2	92±1