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A groundwater supply has the following analysis: Ca2+ = 94 mg/l HCO3- = 317 mg/l Mg2+...

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Civil Engineering

A groundwater supply has the following analysis: Ca2+ = 94 mg/lHCO3- = 317 mg/l Mg2+ = 24 mg/l SO42- = 67 mg/l Na+ = 14 mg/l C1- =24 mg/l Calculate the quantities of lime and soda ash forexcess-lime softening, and the carbon dioxide reacted forneutralization by two-stage recarbonation. Assume that thepractical limits of hardness removal for calcium are 30 mg/1 asCaCO3 and for magnesium are 10 mg/1 as CaCO3 and thatthree-quarters of the final alkalinity is converted to bicarbonate.Calculate the finished hardness and sketch the bar graphs for theraw and finished waters.

Answer & Explanation Solved by verified expert
4.3 Ratings (559 Votes)
SolutionGiven 94 mgL 317 mgL 24 mgL 67 mgL 14 mgL 24 mgLTotal Hardness as    See Answer
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