Table 4 Quality of the wastewater and permeate of PES and PES/CS membranes

Cd (mg/L)​

6.041​

2.714

55.1%

0.341​

94.4%​

0.01

99.8%​

Pb (mg/L)​

0.092​

0.018

80.4%

0.014​

84.8%​

< 0.005​

94.6%​

TSS (mg/L)​

210​0.0

136.0

35.2%

24.0​

88.6%​

8.0​

96.2%​

True color (Pt. Co)

14.3

7.6

47.0%.

2.97

79.2%

1.14

92.0%

COD (mg/L)

57.2

56.5

1.2%

51.6

9.8%

42.2

26.2%

BOD (mg/L)

20.9

20.8

0.4%

18.1

13.4%

14.8

29.2%