Water Conditioning & Purification Magazine

Alkalinity

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Alkalinity means the buffering capacity of water; the capacity of the water to neutralize itself. It prevents the water pH levels from becoming too basic or acid. It also adds carbon to water. Alkalinity stabilizes water at pH levels around seven; however, when the acidity is high in water, the alkalinity decreases, which can harm aquatic life. In water chemistry, alkalinity is expressed in ppm or mg/L of equivalent calcium carbonate. The total alkalinity of water is the sum of all three sorts of alkalinity; carbonate, bicarbonate and hydroxide alkalinity.

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