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University of Garmian
Civil engineering department
Third stage
Water supply and sewerage
calcium content test
Zhwar amin salih
Supervised by : Mr. Hunar Ali
lab date : 4-4-2023
report date : 23-4-2023
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TABLE OF CONTENT :
1. Introduction
2. purpose
3. standard reference
4. Materials and equipment
5. Experimental procedure
6. Analysis data
7. Conclusion
8. Data sheet
9. Reference
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Introduction :
Calcium water content is the measure of calcium ions present in
a sample of water . high levels of calcium in water leads to a
condition in water known as water hardness . Total hardness of
water consists of magnesium hardness and calcium hardness.
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purpose :
• Determine calcium content present in water sample .
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Standard reference :
• ASTM D511-14(2021)e1
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Materials and equipment :
1. Calcium and magnesium meter .
2. Cuvette
3. Calcium reagent (HI93752-A)
4. Reagent (HI93752-B)
5. Buffer
6. Microfiber cloth
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Experimental procedure :
• Turn the calcium meter on .
• Add (3 ml) of sample water into a cuvette by a syringe.
• Add (7 ml) of calcium reagent (HI93752-A) into the
cuvette .
• Add 4 drops of buffer into the mix .
• Add (1 ml) of another calcium reagent (HI93752-B) into
the mix .
• Cap the cuvette and gently shake it 20 times .
• Put the cuvette in the calcium meter and press the read
button for 3 seconds , after that the device gives a result .
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Analysis data :
1. (3 ml) of sample water (kifri water )
2. (7 ml )of (HI93752-A) added to sample water .
3. (1 ml ) of (HI93752-B) added to sample water .
4. 4 drops of buffer is also added to them .
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5. Calcium of sample water result : 134( ).
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Conclusion :
While water hardness is made up of both calcium and
magnesium salts (total hardness), only the calcium component is
important in the water balance. hard water contains a high
concentration of dissolved calcium and magnesium. Hard water
does not pose a health risk, but it is undesirable due to mineral
buildup on plumbing fixtures and poor soap and detergent
performance.
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Our test result was 134( ) which is classified as ( hard ) water
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according to (USGS) .
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Water hardness classification based on their calcium level ,
according to (USGS) is :
Water hardness level Classification
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0 to 60 Soft
61 to 120 Moderately hard
121 to 180 Hard
>180 Very hard
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Precautions to be taken on this test for accurate
results :
1. Using right doses of the calcium reagent . any error in the
dose creates mistakes in the result .
2. Make sure the calcium meter is dust free and cleaned or the
readings will be inaccurate .
3. Make sure the device is in the calcium mode (P1) , because
the device can also read magnesium concentrations too in
(P2) mode .
4. Pressing the read button on the device should be for 3
seconds .
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Data sheet :
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Reference :
• https://www.astm.org/d0511-14r21e01.html
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