salinity/(mg/L)

cationic polymer adsorption amount/(mg/g)

anionic polymer adsorption amount/(mg/g)

3000

3.80

0.86

5000

3.88

0.90

10,000

3.98

0.95

15,000

4.14

0.98

20,000

4.25

1.01

25,000

4.41

1.04