What is the effect of adding alum to water?

Answer: clean water.

It is the hydrolysis of aluminum ions ionized by potassium aluminum sulfate to generate aluminum hydroxide colloid, and then the aluminum hydroxide colloid is used to adsorb particles in water to achieve the purpose of water purification.

can play. Purify the water.

role. Alum water purification is a method often used by the folk in the past, and its principle is that alum can be ionized in the water to produce two kinds.

Metal ions. Whereas, AL is easily hydrolyzed, generated.

Aluminum hydroxide. Al(OH) colloid, aluminum hydroxide colloidal has a strong adsorption capacity, which can adsorb impurities suspended in water and form a precipitate to make the water clear.

So, alum is a better one.

Water purifier. Extended Materials.

First, the preparation method.

1. Natural. Alunite.

The processing method crushes the alum stone, roasts it, dehydrates, weathers, and steames.

Dip. Sedimentation, crystallization, crushing, preparation.

Aluminum sulfate. Finished potassium products.

Bauxite. The method uses sulfuric acid to decompose bauxite to produce aluminum sulfate solution, and then adds.

Potassium sulfate. Reaction, by filtration, crystallization, centrifugal dehydration, drying.

Potassium aluminum sulfate. Products.

3. The recrystallization method of coarse alum is boiled, evaporated, crystallized, separated and dried to obtain the finished aluminum sulfate and potassium sulfate.

4. The aluminum hydroxide method dissolves aluminum hydroxide in sulfuric acid, and then adds the measured potassium sulfate solution.

Heating reaction. Filtered, concentrated, crystallized

Centrifugation. Dry and prepare finished aluminum sulfate potassium products.

5. Dissolve potassium sulfate in 70g100 water.

Aluminum sulfate octadecahydrate.

Al(SO) 18h o dissolved in 60g100 water.

Mix the two solutions while they are hot and stir constantly.

Mixed liquids. Cool slowly, and when the solution is cooled to 20, about 85g can be obtained

Potassium aluminum sulfate dodecahydrate.

crystallization. 6. Adopt the recrystallization method.

The industrial product potassium aluminum sulfate is dissolved in water, and then purified, impurified, filtered, concentrated, crystallized, centrifugal dehydrated, and dried to obtain potassium aluminum sulfate.

7. Origin of raw materials.

The origin of China is Anhui Province.

Lujiang alum mine. Wait.

Chekiang. Jinshan Town, Cangnan County.

Known as the "Alum Capital of the World" because of its abundant alum ore reserves, its alum ore reserves account for about 60% of the world and 80% of China's, and the mineral deposits are distributed in five adjacent ore belts.

Sogou Encyclopedia. Potassium aluminum sulfate dodecahydrate.

Alum dissolves in water to hydrolyze ions, and the equation is:

al3+ +3h₂o = al(oh)₃↓3h+

The chemical equation is:

2kal(so₄)₂h₂o ==2al(oh)3↓＋k₂so₄＋3h₂so₄

Potassium aluminum sulfate dodecaehydrate, also known as: alum, alum, potassium alum, potassium alum, potassium alum, potassium alum, the state has banned its use in food additives, is a double salt of potassium sulfate and aluminum sulfate containing crystal water.

Colorless cubic crystals, the appearance is often octahedral, or with the cube, rhombic dodecahedron to form a polymorphic shape, sometimes attached to the container wall and resembling a hexagonal plate, belonging to the type alum double salt, with glass luster.

Density, melting point. 9 molecules of crystal water are lost, and 12 molecules of crystal water are lost at 200, which are soluble in water and insoluble in ethanol. Alum is sour and toxic in taste.

to remove the tiny suspended solids in the water and make the small particles stick to each other.

It becomes flocculent.

Precipitate purified water.

Natural water often contains a lot of fine suspended solids (bacteria, algae, protozoa, sediment, clay and other insoluble substances), colloidal substances (such as humus colloids, etc.) and some soluble salts, gases, etc. When removing suspended solids, coagulants such as alum or aluminum sulfate are commonly used to aggregate these impurities to form larger particles and precipitate.

Most of the impurities in natural water are negatively charged particles, while aluminium hydroxide particles are positively charged, so the positively charged aluminium hydroxide particles can neutralize the negative charge of colloidal impurities in the water, so these impurities will soon condense and sink together with the aluminium hydroxide flocculents.

Since K2SO4 in alum has no effect on purifying water, and K2SO4 is a raw material, aluminum sulfate is generally used as a coagulant for water purification. In addition to aluminum sulfate, the water purification coagulant used in industry also includes aluminum chloride, iron chloride, iron sulfate, etc.

Water purification with alum can only remove suspended impurities in the water, but most of the salts dissolved in the water cannot be removed.

to remove the tiny suspended solids in the water and make the small particles stick to each other.

It becomes flocculent.

Precipitate purified water.

Alum can ionize Al3+ metal ions in water, and Al3+ is easily hydrolyzed to generate aluminum hydroxide colloid, which has a strong adsorption capacity and can adsorb impurities suspended in water and form a precipitate to make the water clear.

The aluminum contained in alum is harmful to humans. Long-term consumption of alum-purified water may cause Alzheimer's disease. It is no longer advisable to use alum as a water purification agent.

Alum has the effect of purifying water, and adding alum to the water can clarify the water.

Hello, happy with your question. The addition of alum to the water in the pool has a sedimentation effect. Copper sulfate is mainly used to kill algae, to remove the algae in the swimming pool, sodium hypochlorite is mainly used for disinfection, alum mainly plays a role in precipitation, and two methods are mainly used to keep the water clean, the first is to use the drug pump to automatically dosing, and then to carry out manual sprinkling, if there is sediment, timely underwater dust removal until the water quality reaches the standard.

Removes debris and acts as a filter.

Alum is added for water purification.