quiz 2 Flashcards
(10 cards)
What are units of concentration of contaminants in liquids?
mg/L, ppb, mol/L
What are units of concentration of contaminants in solids/sludges?
mg/kg, % weight
What are units of concentration of contaminants in air?
mg/m^3, ppm by volume, ug/m^3
What is the definition of specific gravity of sludge?
Specific gravity of sludge = density of sludge / density of water
How does ppm relate with mg/L in dilute solutions?
ppm = mg/L for dilute solutions
What does 1% by volume for a contaminant mean
1 part of contaminant per 100 parts of air
State the Law of Conservation of Mass
Mass can neither be created nor destroyed
Write the general equation for a mass (material) balance of a non-steady-state, non- conservative system
Input rate – output rate – decay rate = accumulation rate
For a non-conservative system with a first order decay how is the decay rate expressed
KCV
Write the general equation for a mass balance for a steady-state, conservative system
Input rate = output rate
