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400 mg/L. The product flow is 0.61 m /m • day and contains 90 mg/L NaCl, 6 mg/L CaCl2, and 8 mg/L MgSO4. The feedwater inflow is 104.9 m3/day. (a) What is the percent rejection of NaCl? (b) What is the over-all percent rejection of ions?

Solution:

(a) R _ IQolCJ-IQplCpJ(100) _ 104.9(3,000) - 0.61(102.18)(90) )

(b) R _ 104.9(3>000 + 300 + 4100) - 0.61 (102.18)(90 + 6 + 8) (™) ( ) _ 104.9(3,000 + 300 + 400) ( )

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