Question

The following solutions are representative of common applications of reverse osmosis. Calculate the osmotic pressure of each at 20°C. a. NaCl-35,000 mg/L (representative of seawater RO), take ф-0.94. b. NaC1-8000 mg/L (representative of brackish water RO), take ф-0.94. C. Hardness-400 mg/L as CaCO3 (representative of softening NF), assume φ = 1. d. Dissolved organic carbon (DOc) 25 mg/L (representative of using NF to control DBP formation by removing DBP precursors. Assume an average MW of 1000 g/mol.), assume φ-0.94.

Answer 1

a) we uotrie phasur p094 3S Soo = 0.9859 mot(litre. R=umivas al gas coudat mole 0.94

m=100 x400 m 4000o m 3SSOo omoCic d) oooxlooo 0 0.9