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A water contains 3.5 mg/L of ferrous iron (Fe2+), 0.3 mg/L of manganese (Mn2+), and 0.7 mg/L of ammonia (NH3-N). If a free residual chlorine of 0.3 mg/L is needed after disinfection of this water, then the required chlorine dose (in mg/L) to disinfect this water is:

A water contains 3.5 mg/L of ferrous iron (Fe2+), 0.3 mg/L of manganese (Mn2+), and 0.7 mg/L of ammonia (NH3-N). If a free residual chlorine of 0.3 mg/L is needed after disinfection of this water, then the required chlorine dose (in mg/L) to disinfect this water is:

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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20. A water contains 3.5 mg/L of ferrous iron (Fe2+), 0.3 mg/L of manganese (Mn2+), and 0.7 mg/L of ammonia (NH3-N). If a free residual chlorine of 0.3 mg/L is needed after disinfection of this water, then the required chlorine dose (in mg/L) to disinfect this water is: 5
Transcribed Image Text:20. A water contains 3.5 mg/L of ferrous iron (Fe2+), 0.3 mg/L of manganese (Mn2+), and 0.7 mg/L of ammonia (NH3-N). If a free residual chlorine of 0.3 mg/L is needed after disinfection of this water, then the required chlorine dose (in mg/L) to disinfect this water is: 5
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