7. Estimate the scaling potential for the RO-treated water samples, by applying LSI. Unit Constituent Ca²+ HCO3 TDS pH mg/L as CaCO3 mg/L as CaCO3 mg/L A 5 7 20 6.5 Water B 10 12 25 7.8

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Estimate the scaling potential for the RO-treated water samples by applying LSI
T
Test run time, min
2
5
10
20
Ca²+
HCO3
TDS
pH
4. Estimate the scaling potential for the RO-treated water samples, by applying LSI.
Constituent
Unit
Cumulative volume filtered, mL
B
500
700
890
1150
mg/L as CaCO3
mg/L as CaCO3
mg/L
A
315
575
905
1425
A
5
7
20
6.5
Water
B
10
12
25
7.8
Transcribed Image Text:T Test run time, min 2 5 10 20 Ca²+ HCO3 TDS pH 4. Estimate the scaling potential for the RO-treated water samples, by applying LSI. Constituent Unit Cumulative volume filtered, mL B 500 700 890 1150 mg/L as CaCO3 mg/L as CaCO3 mg/L A 315 575 905 1425 A 5 7 20 6.5 Water B 10 12 25 7.8
Expert Solution
Step 1: Langelier Saturation Index (LSI)

The Langelier Saturation Index (LSI) is a measure of the tendency of water to form calcium carbonate scales.

It is calculated using the following equation:

LSI = pH - pHs

where

  •  pH is the actual pH of the water
  •  pHs is the saturation pH of calcium carbonate.


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