Abstract
Sulphur pollution has closely been linked to the problems of acid precipitation and lake acidification1. Although variations in sulphur isotopes can in principle be used to fingerprint the sources of sulphur in the lacustrine environemnt (see refs 2–5), no attempt has so far been made to apply the technique in the study of pollutant sulphur in lakes in an historical sense. We report here the concentrations and isotopic composition of sulphur in sediments of several softwater lakes of northern Ontario. An objective of the study has been to ascertain whether the accumulation of sulphur in the sediments is related to the flux of pollutant sulphur into the lakes.
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