Resuspension Calculator

Formula

To calculate the Resuspension Rate (RR):

\[ RR = \frac{C \times A \times V}{T \times H} \]

Where:

\(RR\) is the Resuspension Rate
\(C\) is the Concentration of the Substance in the Air (mg/m³)
\(A\) is the Area Affected by the Resuspension (m²)
\(V\) is the Volume of Air in the Affected Area (m³)
\(T\) is the Time Period Over Which the Resuspension Occurs (hours)
\(H\) is the Height of the Affected Area (meters)

What is Resuspension?

Resuspension is a process in which particles that have settled at the bottom of a liquid medium are mixed back into the medium, typically by agitation or shaking. This process is commonly used in various scientific and industrial applications, such as in the field of biology where cells or DNA that have settled at the bottom of a solution need to be evenly distributed throughout the solution for further analysis or experimentation. Resuspension is crucial in these contexts because it ensures that the particles or substances of interest are evenly distributed, allowing for accurate measurements and observations. The process can be done manually by shaking or stirring, or with the use of specialized laboratory equipment like vortex mixers or centrifuges.

Example Calculation

Let's assume the following values:

Concentration (\(C\)) = 10 mg/m³
Area (\(A\)) = 50 m²
Volume (\(V\)) = 100 m³
Time Period (\(T\)) = 2 hours
Height (\(H\)) = 3 meters

Using the formula:

\[ RR = \frac{10 \times 50 \times 100}{2 \times 3} = \frac{50000}{6} \approx 8333.33 \text{ mg/m³/hr} \]

The Resuspension Rate is approximately 8333.33 mg/m³/hr.