Soil Contamination Flashcards
(30 cards)
Industrial Sources of Soil contamination
Chemical industry, gass, electricity wood preservatives, oil refining, etc.
Chemical industry, gass, electricity wood preservatives, oil refining, etc.
Industrial Sources of Soil contamination
agricultural sources of soil contamination
pesticides for plants and animals
pesticides for plants and animals
agricultural sources of soil contamination
components of soil
silicates (clay), carbonates, lignin, and other biological mater
silicates (clay), carbonates, lignin, and other biological mater
Components of soil.
lignin
the stringy fibres from wood, breaks down into fulvic acid, composes 0.1-7% of the soil
the stringy fibres from wood, breaks down into fulvic acid, composes 0.1-7% of the soil
lignin
fulvic acids
chemicals that form due to the breakdown of lignin. Have multiple benzene rings and many acidic active groups.
chemicals that form due to the breakdown of lignin. Have multiple benzene rings and many acidic active groups.
Fulvic Acids
Important properties for soil contaminaation
lipophilicity, and vapor preasure
lipophilicity, and vapor preasure
Important properties for soil contaminaation
Volitization
the spontanious escape of chemicals into the air
the spontanious escape of chemicals into the air
Volitization
wicking
the particles are able to volitize more easiy in wet soil because they are drawn upwards through the water.
the particles are able to volitize more easiy because they are drawn upwards through the water.
wicking
vapor preasure and volitization rate
the higher the VP the faster it will volitize
leaching
when the chemical in the soil gets washed away by water
when the chemical in the soil gets washed away by water
leaching
Leaching equation
R=1/(Kd(1-p^(2/3))dx) where Kd is the soil/water partition, d is the soil density, and p is the pore water fraction
R=1/(Kd(1-p^(2/3))dx) where Kd is the soil/water partition, d is the soil density, and p is the pore water fraction
Leaching equation
mobility index for a particle in the soil
MI=log(SV/Kom) Where S is the solubility in mg/L, V is the vapor pressure in mm mercury, and Kom is the soil partition coeficient
MI=log(SV/Kom) Where S is the solubility in mg/L, V is the vapor pressure in mm mercury, and Kom is the soil partition coeficient
mobility index for a particle in the soil
calculating Kd=
=Kom*Fom where F om is the fraction of organic matter in the soil.
