Applied Chemistry I: UNIT 1: Water Technology
Types of Impurities in Water
The impurities present in the water may be broadly classified into three types. 1. Physical Impurities 2. Chemical Impurities 3. Biological Impurities
TYPES OF IMPURITIES IN WATER
The impurities present in the water may be broadly classified into three types.
Impurities
• Physical Impurities :
(a) Suspended Impurities (b) Colloidal Impurities
• Chemical Impurities :
(a) Dissolved Salts (b) Dissolved gases
• Biological Impurities
1. Physical impurities
(a)
Suspended impurities like sand, oil droplets, vegetable and
animal matter, impart turbidity to water.
(b)
Colloidal impurities like finely divided silica, clay and
organic waste products impart colour, odour and taste to water.
2. Chemical impurities
(a)
Dissolved salts like bicarbonates, sulphates and
chlorides of Ca and Mg and carbonates, bicarbonates of Na and K.
Dissolved Mg and Ca
salts in water cause "hardness", whereas alkali salts (bicarbonates,
carbonates of K and Na and bicarbonates of Ca and Mg) make the water
"alkaline".
(b)
Dissolved gases like O2, CO2, H2S,
SO2 make the water "acidic". So they accelerate the rate
of corrosion.
3. Bacterial impurities
Bacterial impurities
like fungi, bacteria and other microorganisms cause diseases.
Applied Chemistry I: UNIT 1: Water Technology : Tag: Applied Chemistry : - Types of Impurities in Water
Applied Chemistry I: UNIT 1: Water Technology
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Applied Chemistry I
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