Identification of anthropogenic contaminant sources in urbanized streams using multiple isotopes

摘要: Water samples were collected from three streams flowing through the metropolitan city of Daejeon in South Korea to identify controls on composition dissolved ions stream waters. The seasonal and spatial variations concentrations examined major contaminant sources identified using multiple isotopes. All exhibited gradual increases Cl, NO3, SO4 as water flowed downstream; types changed Ca–HCO3 Ca–(Cl, SO4). Combined δ15NNO3 δ18ONO3 data revealed that NO3 was mainly derived manure or sewage, with partial contributions NH4 fertilizer summer. δ34SSO4 waters indicated sulfates contaminants, such detergent, chemical supplied discriminately each along its course. 87Sr/86Sr ratios combined Sr Cl suggest sewage associated rather than detergent contributed significantly all streams.