On what type of waste do we measure alkalinity: physical state, source etc?- What compounds/chemicals may be responsible for alkalinity inwaste/wastewater?- Considerations/precautions for: (1) sampling (2) analysis and equipment?- General ranges of alkalinity?
Question
On what type of waste do we measure alkalinity: physical state, source etc?- What compounds/chemicals may be responsible for alkalinity inwaste/wastewater?- Considerations/precautions for: (1) sampling (2) analysis and equipment?- General ranges of alkalinity?
Solution
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Alkalinity is typically measured in liquid waste, specifically in wastewater. This is because alkalinity in wastewater is a critical factor in determining the health of the water body and its ability to neutralize acids.
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The compounds or chemicals that may be responsible for alkalinity in waste or wastewater include bicarbonates (HCO3-), carbonates (CO32-) and hydroxides (OH-). These are all basic in nature and contribute to the overall alkalinity of the water.
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When sampling for alkalinity, it's important to ensure that the sample is representative of the water body. This means taking samples from different locations and depths. The samples should be analyzed as soon as possible to prevent changes in alkalinity. For analysis, titration is commonly used. The equipment used should be clean and free from any contaminants that could affect the results.
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The general range of alkalinity in wastewater can vary greatly depending on the source of the water. However, a typical range could be from 50 to 300 mg/L as CaCO3. High alkalinity levels can indicate pollution from industrial sources or runoff from agricultural areas.
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