Trace elements in groundwater as indicators of anthropogenic impact |
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| Authors: | Igors Levins Edmund Gosk |
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| Institution: | (1) State Geological Survey of Latvia, Eksporta Street 5, 1010 Riga, Latvia;(2) Geological Survey of Denmark and Greenland, GEUS, Oster Voldgade 10, 1350 Copenhagen, Denmark |
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| Abstract: | The distribution of several minor and trace elements mainly in fresh (dominating TDS 160–400 mg/l) groundwater of Latvia have
been investigated by the Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) technique. An evaluation of results of about
700 analyses leads to the conclusion that concentrations of these elements is influenced by: pH–Eh conditions, groundwater
residence time and diffuse contamination, whereas the role of water-bearing sediments is of secondary importance. Most trace
elements are characterised by low mobility under alkaline and reducing conditions; concentrations in confined aquifers are
much smaller than the Maximum Permissible Values for drinking water. The strongest anomalies of REE, Al and P were found in
shallow groundwater around the former agrochemical storehouses. |
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| Keywords: | Groundwater chemistry Trace elements ICP-MS pH– Eh Agricultural contamination |
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