1. What is Percentage Removal?

Percentage removal is a measure of how much of a substance has been removed from a total amount, expressed as a percentage of the original total. It's commonly used in filtration, purification, and waste removal processes.

2. How Does the Calculator Work?

The calculator uses the percentage removal formula:

Where:

• \( \text{Removed} \) — Amount of substance removed
• \( \text{Total} \) — Original total amount of substance

Explanation: The formula calculates what percentage of the original total has been successfully removed.

3. Importance of Percentage Removal Calculation

Details: Calculating percentage removal is essential for evaluating the efficiency of removal processes, comparing different methods, and meeting regulatory requirements for contaminant removal.

4. Using the Calculator

Tips: Enter the removed value and total value in the same units. The removed value cannot exceed the total value. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage removal and percentage remaining?
A: Percentage removal shows how much was removed, while percentage remaining shows how much is left (100% - removal %).

Q2: Can percentage removal be more than 100%?
A: No, percentage removal cannot exceed 100% as you cannot remove more than the total amount present.

Q3: How is percentage removal used in water treatment?
A: It's used to measure the effectiveness of removing contaminants like bacteria, chemicals, or particulates from water.

Q4: What's considered a good percentage removal?
A: This depends on the application. For drinking water, 99.9% removal might be required for certain pathogens, while 80% might be acceptable for some industrial processes.

Q5: How do I calculate removal when dealing with logarithmic scales?
A: For log removal values (common in microbiology), different formulas are used that account for orders of magnitude reduction.