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CH3041
ORGANICS & KOW
• Organic
chemicals are common pollutants and may either be polar (containing OH, NH2 or ionic groups) or non-polar.
• Non-polar organics will tend
to be water insoluble eg. DDT »10-2 mmol L-1
to be water insoluble eg. DDT »10-2 mmol L-1
• Common: DichloroDiphenylTrichloroethane
• The octanol-water
partition coefficient KOW
KOW = sol. octanol / sol. H2O, indicates how
an organic material will partition itself
between polar water and non-polar octanol.
eg. DDT »106 CHCl3 102
KOW = sol. octanol / sol. H2O, indicates how
an organic material will partition itself
between polar water and non-polar octanol.
eg. DDT »106 CHCl3 102
• Fatty tissues are
‘organic solvents’, KOW \
indicates if an organic cmpd will be adsorbed
thru the skin or retained after ingestion.
indicates if an organic cmpd will be adsorbed
thru the skin or retained after ingestion.
