Graphene Oxide/Fe₃O₄/Chitosan−Coated Nonwoven Polyester Fabric Extracted from Disposable Face Mask for Enhanced Efficiency of Organic Dye Adsorption

Table 1

Removal efficiency (%) of MB and MO by various coated NWPF samples at different pH levels.

Sample codes		M2	M3	M4	M5	M6	M7	M8	M9
Compositions	NWPFs	+^(a)	+	+	+	+	+	+	+
	GO	—^(b)	+	—	—	+	+	—	+
	CS	—	—	+	—	—	+	+	+
	Fe3O4	—	—	—	+	+	—	+	+
Acidic medium	%^(c) for MB	31.71	103.70	31.08	26.71	34.68	31.65	25.64	27.04
	% for MO	4.55	34.65	31.48	14.95	26.07	27.97	57.01	53.51
Neutral medium	% for MB	29.20	101.32	25.78	35.69	91.54	35.08	31.66	40.33
	% for MO	4.58	20.73	17.78	6.73	14.67	6.68	9.64	8.19
Basic medium	% for MB	35.08	105.37	39.78	39.78	99.25	99.82	46.63	86.66
	% for MO	6.59	17.95	8.49	7.15	13.67	10.99	6.89	7.59

^(a)Presence; ^(b)absence; ^(c)removal efficiency (%).