Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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For each of the following indicate if the designated technology is appropriate for the indicated water-quality problem. Explain why or why not (answer in no more than a few sentences).
g. Lime treatment for hardness of 90 mg/L as CaCO3.
h. Ion exchange for hardness of 90 mg/L as CaCO3.
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- A//If the concentration of Ca is 56.4 mg/L and of Mg is 8.8 mg/L in water, what is the total hardness of the water expressed in rng/L of caco;?arrow_forwardYou are asked to design a water softening system to bring following water to a final hardness if 75.0 mg/L as CaCO3. The ion concentrations reported below are all mg/L as CaCO3. Ca2+ = 240.00; Mg2+ = 90.0; HCO3- = 268.0; and CO2= 18.0 The total lime required and initial NCH are nearly 1. 330 and 268 mg/L as CaCO3 2. 376 and 62 mg/L as CaCO3 3. 330 and 27 mg/L as CaCO3 4. 376 and 268 mg/L as CaCO3arrow_forward7. Calculate the amount of lime (84%) and soda (92%) required for treatment of 20,000 litres of water, whose analysis is as follows: Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; CaSO4 = 34 ppm; CaCl2 = 27.75 ppm; MgSO4 = 30.0 ppm; SiO2 = 3.5 ppm; NaCl = 10 ppm. Also calculate the temporary & permanent hardness of water sample.arrow_forward
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