INPUT OF IONIC ALKYLLEAD COMPOUNDS TO SURFACE WATERS

Concentrations of ionic alkyllead compounds (IAL) and the total lead i n different types of water from continental (the town of Zagreb) and c oastal (the town of Sibenik) parts of Croatia have been measured. The ranges of IAL concentrations obtained were: in untreated urban wastewa ter 7.5-27.5 ng Pb/l (0.01-0.05% of Pb(TOT)), in river water < 0.5-7.5 ng Pb/l (0.01 0.9% of Pb(TOT)), in lake water 0.4-2.4 ng Pb/l (0.1-2% of Pb(TOT)) and in seawater < 0.5-12.5 ng Pb/l (0.6-6.8% of Pb(TOT)). The manner of transport of lead compounds to various surface waters i s discussed. The main sources of organic lead for the investigated wat er bodies were as follows: for river water - untreated wastewaters, fo r a small lake - wet deposition and for the coastal sea - the gasoline station. Concentrations obtained were in good agreement with literatu re data on the organolead level in surface waters from Europe.