Bulletin of the National Research Centre

Table 4 Factors affecting removal of heavy metals from wastewater

From: Bacterial biosurfactant from Citrobacter freundii MG812314.1 as a bioremoval tool of heavy metals from wastewater

Biosurfactant amount (%)	Contact time (day)	Heavy metals removal (%)
Biosurfactant amount (%)	Contact time (day)	Al²⁺	Cd²⁺	Cu²⁺	Fe²⁺	Pb²⁺	Mn²⁺	Zn²⁺
5	3	47.0^b	25.0^c	50.0^c	30.0^b	20.0^c	30.0^c	55.0^c
5	6	50.0^b	30.0^b	52.0^c	35.0^b	23.0^c	40.0^b	62.0^b
10	3	66.0^a	41.0^a	67.0^a	45.0^a	44.0^a	55.0	80.0^a
10	6	54.0^b	39.0^a	61.0^b	33.0^b	37.0^b	53.0	77.0^a
MSE		2.17	0.91	0.91	2.34	1.77	1.47	1.38

Mean having similar letters in each column are not significantly different (P < 0.05)

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