HALOCARBON CONCENTRATIONS IN ASKERÖFJORDEN RELATED TO THE WATER EXCHANGE AND INPUTS FROM THE PETROCHEMICAL SITE AT STENUNGSUND
The concentrations of chloroform, carbon tetrachloride, dibromochloromethane, bromoform, methyl chloroform and perchloroethylene have been determined at 13 stations in the area of the petrochemical centre at Stenungsund. The concentrations of methyl chloroform and perchloroethylene confirm a water exchange of Askeröfjorden of 5-15 % per day. Large variations of the halocarbon concentrations at depths of 1 and 5 or 10 m show that the fjord is not well mixed. The concentrations of the other halocarbons indicate additional sources. One is the formation of chloroform, bromoform and possibly dibromochloromethane upon chlorination of cooling water at Norsk Hydro Plast, a plant which produces chlorine and polyvinyl chloride
Författare KATARINA ABRAHAMSSON, DAVID DYRSSEN, GABRIELLA JOGEBRANT and MIKAEL KRYSELL
Nyckelord petrochemical industries, effluents, fjord water exchange, mixing, halocarbons, tracers.