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You are probably mistaken as to what is on your brick. More than likely it is a white crystal like powder that is coming from the the mortar joints between the bricks and discoloring your brick face.

If that's the case, it is a calcium carbonate crystal and commonly referred to as Efflorescence. You can use phosphoric acid as a method to remove the crystals from the surface. It is important to restore a neutral pH back to the surface after using an acid based remover.

Possibly more important is that unless you stop moisture from carrying calcium hydroxide out of a cement based concrete product, it will certainly happen again. Moisture inside migrates out to the surface and the internal chemistry carried with it reacts with carbon dioxide in the earths atmosphere to form these salt crystals. Take a look at http:/www.StableCrete.com to see a penetrating product that waterproofs to keep moisture out and does not allow it to expel chemicals out to the surface. This will keep you from having to clean it again!

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Q: How do you clean the phosphorous on brick?
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Can you clean brick with sulfuric acid?

Yes


Can you clean brick with vinegar?

Yes, you can use vinegar to clean bricks. Vinegar is commonly used to gently clean bricks and restore them to original condition.


What is the chemical used to clean stone brick stucco stained by water?

Diluted bleach can clean stone brick stucco. Often gentle water pressure can remove hard water stains on stucco as well.


What is brick acid?

Brick acid is a solution of mainly hydrochloric acid. It is used to clean mortar and brickwork by dissolving rust, scale etc.


How do you clean efflorescence from an indoor brick wall?

Use disclean or brick cleaner acid in a bucket & brush or sprayer pump, paint on neat let dry then seal it all with brick sealer. Job done


What is the main source for phosphorous?

Phosphorous mines


Is phosphorous a macro nutrient?

Phosphorous is a macronutrient.


How do you clean brick walls?

There are professional firms available in market that provides services of Brick Cleaning in London. Instead of doing it all by yourself, you should opt to a professional.


What type of nutrient is phosphorous?

Phosphorous is indispensable for plants.


Can hydrochloric acid be used to clean mortar from brick walls?

maybe but the acid could kill you


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Why is phosphorous often a limiting factor in environments?

Phosphorous is often a limiting factor in environments because plants need phosphorous to maintain their cellular biology. If there is insufficient phosphorous, plants will be stunted or not grow at all. If there is too much phosphorous, plants also have a difficult time or won't grow. Phosphorous uptake is not something that plants can control with certainty, and phosphorous could be a limiting nutrient in a given area under study. Use the link to the Wikipedia article on phosphorous and see what is posted on phosphorous and biology.