Application of Nanometal Oxides In Situ in Nonwoven Polyester Fabric for the Removal of Bacterial Indicators of Pollution from Wastewater

Table 2

Effect of contact time for bacterial reduction using nano-Ag-oxide.

Bacterial strain; (CFU/100 mL)	Contact time	CFU/100 mL		% of removal
		Control of fabric without nAg2O	Fabric with nAg2O
Staphylococcus aureus  3.1×10^4	^∗𝐶0	3.0×10^4	2.4×10^4	22.7
	15 min	3.3×10^4	2.1×10^4	32.3
	30 min	3.4×10^4	1.6×10^4	48.4
	60 min	3.7×10^4	1.1×10^4	64.5
	120 min	4.1×10^4	1.1×10^3	96.5
	180 min	4.7×10^4	8.6×10^2	97.2
	24 h	5.1×10^4	1.2×10^2	99.6
Escherichia coli  4.6×10^4	𝐶0	4.6×10^4	3.2×10^4	30.4
	15 min	4.8×10^4	2.1×10^4	54.3
	30 min	5.0×10^4	1.6×10^4	65.2
	60 min	5.4×10^4	1.2×10^4	73.9
	120 min	5.8×10^4	4.2×10^3	90.8
	180 min	6.1×10^4	6.2×10^2	98.7
	24 h	6.9×10^4	1.1×10^2	99.8
Salmonella typhi  6.4×10^3	𝐶0	6.4×10^3	5.2×10^3	18.8
	15 min	6.5×10^3	3.9×10^3	39.1
	30 min	6.8×10^3	3.7×10^3	42.2
	60 min	7.1×10^3	2.1×10^3	67.2
	120 min	7.4×10^3	1.0×10^3	84.4
	180 min	7.7×10^3	6.2×10^2	90.3
	24 h	1.1×10^4	10.1×10	99.8

^∗𝐶₀: the concentration at zero retention time; minutes: min; hours: h.