Water purification expert - alum

author：Xinhua 2021-11-08 14:39:32

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Alum water purification is a method often used by folk in the past, and its principle is that alum can ionize two metal ions in water. The adsorption capacity of aluminum hydroxide colloid is very strong, which can adsorb impurities suspended in water and form a precipitate to clarify the water. Therefore, alum is a better water purifier.

This work is the original of "Popular Science China - Scientific Principles One-Point Pass", please indicate the source when reprinting.

alum

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