Chapter 12 - Introduction to Iron and Manganese Treatment

Question 1

An abundant element found naturally in the earth, as a result, it is found dissolved in most water supplies.
When the concentration exceeds 0.3 mg/L, it causes red stains on plumbing fixtures and other items in contact with the water.
This can be present in water as a result of the corrosion of cast-iron pipes.
This is usually the cause of red-water problems.

Answer 1

Iron

Question 2

An abundant element found naturally in earth and dissolved in many water supplies.
At a concentration above 0.05 mg/L, it causes black stains on plumbing fixtures, laundry and other items in contact with the water.

Answer 2

Manganese