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A RO system operates at an overall recovery, r, of 75%. The overall rejection efficiency for Na+ in the system is 96%. The Na+ concentration

A RO system operates at an overall recovery, r, of 75%. The overall rejection efficiency for Na+ in the system is 96%. The Na+ concentration in the feed is 2 g/L.

a) What is Na+ concentration in the concentrate exiting the system?

b) What is the overall mass rejection in the system for Na+ i.e. which part of the Na+ entering the system exits in the retentate stream?

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