Organic chlorine compounds in lake sediments. 3. Chlorohydrocarbons, free and chemically bound chlorophenols

Chlorohydrocarbons and free and chemically bound chlorophenols, catechols and guaiacols were measured from lake sediments in central Finland. Chlorohydrocarbons occurred at low background levels except chlorocymenes from pulp mills and PCBs near the city of Aeaenekoski, where a local leakage occurs. Free chlorophenols (hexane extractables) were found in all 18 areas studied, but the bound ones (extracted with strong alkali) only in the pulp mill recipient lakes where they dominated.