The Use Of a pH Meter In Water treatment
During the water quality testing process, we measure the pH level as high/low pH can cause health problems. Well, in homes; we don’t usually test the pH level in drinking water, but the professionals in water treatment do it as a part of the quality testing of drinking water. What’s the device they use for measuring the pH level in water? Why it’s important to measure the pH level in drinking water? Everything covered in this article.
pH in water: The pH value denotes the hydrogen ion activity in a sample (H.+) As you already know, the pH scale runs from 0 to 14. pH 7 is neutral, below 7 acidic, and above 7 alkalines.
Why pH in water changes?: Well, many factors affect the pH level in the water. The soil composition and the bedrock the water moves in is a top factor. Anyway, some rock types have no effect on pH, and some rock types can change the pH levels. For example, while limestone neutralizes the acid; granite has no effect. You can use a pH meter to measure the acidity and alkalinity of water easily.
Another major factor that affects the pH levels in water is the organic material and amount of plant growth. The decomposition of materials releases carbon dioxide. Carbonic acid is the by-product of water mixing with carbon dioxide. Well, it’s a weak acid, but in large quantities’ it can change the water pH levels.
The third factor changing the water pH is the mixing of chemicals into the water. Everybody, including me, adds chemicals to natural water resources. It can be something harmless as shampoo and soaps. People add chemicals to water in many industries as many industrial processes need water of specific pH levels. They use pH Meters to determine the water pH level (this happens widely in drinking water bottle industry.) Waste water from factories discarded into natural waters resources changes pH levels.
Another factor changing the water pH is acid rains. Well, many reasons are there for acid rain falls. Acid rains can change the pH levels of natural water resources to a greater extent.
How do pH Meters work?: A pH Meter has three main components Wikipedia describes how the device works in details, so I am giving you the link The temperature of the solution measured affect the meter’s glass membrane. Using this device on hot solutions would decrease its lifespan.
pH level standards in drinking water: pH of pure water is 7 (neutral.) So, water with <7 is acidic and >7 is alkaline. pH level below 7 indicates the presence of metal ions in water (manganese, copper, zinc, and lead.) Acidic water usually has a sour taste and can damage the teeth. So, the professionals in water treatment measure the pH levels with a pH Meter and add neutralizers to balance the pH levels to standard levels.
The pH levels above 7 make water to taste bitter. Also, you will find it difficult to wash the clothes with alkaline water.
Summary: Measuring pH levels in drinking water is a must. Pure water has a pH of 7. The professionals use a pH Meter to determine the pH in drinking water and add neutralisers accordingly.