Where is nitric acid most commonly used within a water treatment facility?

Where is nitric acid most commonly used within a water treatment facility?

• A. In the laboratory
• B. In the influent system
• C. To clean the equipment
• D. In the well system

Answer: (A)

Nitric acid is a strong acid used primarily as a laboratory reagent in water treatment facilities. In the lab, technicians acidify samples to preserve them and to bring metals into solution for analytical methods, such as ICP-MS or AAS, and to prepare calibration standards. This analytical work requires controlled conditions, proper ventilation, and specialized equipment, which is why the lab is the natural home for nitric acid within the facility. Using it in the influent or well system would disturb treatment chemistry and raise corrosion and safety concerns, and using it as a routine cleaner for plant equipment isn’t the typical practice. So the most common use is for analytical work and sample preparation in the laboratory.

Nitric acid is a strong acid used primarily as a laboratory reagent in water treatment facilities. In the lab, technicians acidify samples to preserve them and to bring metals into solution for analytical methods, such as ICP-MS or AAS, and to prepare calibration standards. This analytical work requires controlled conditions, proper ventilation, and specialized equipment, which is why the lab is the natural home for nitric acid within the facility. Using it in the influent or well system would disturb treatment chemistry and raise corrosion and safety concerns, and using it as a routine cleaner for plant equipment isn’t the typical practice. So the most common use is for analytical work and sample preparation in the laboratory.