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Influence of hydrogeological conditions on fluorine concentrations in underground water intended for consumption

100%

Koc J., Glinska-Lewczuk K., Wons M.

Journal of Elementology

2007

tom 12

nr 4

303-315

This study presents the results of an analysis of factors which affect fluorine concentrations in deep water drawn for consumption. The analysis covered two water intakes in Tczew (northern Poland) consisting of 19 wells which supply water from Cretaceous (4), Tertiary (10), and Tertiary and Quaternary (5) horizons. Fluoride concentrations ranged from 0.3 to 2.8 mg·dm-3 with the Maximum Allowable Concentration of 1.5 mg·dm-3. The allowable qualitative standards were exceeded in 38% of the investigated samples. It was found that fluorine concentrations were most profoundly affected by the water-bearing horizon (the highest concentration levels were observed in water drawn from Cretaceous horizons) and well depth. As a general trend, fluorine concentrations increase with depth, but the analysis of water drawn from the same horizon indicates that bottom-layer water may be characterised by a significantly lower fluoride content. The highest fluorine concentrations were reported in water drawn from Cretaceous water-bearing horizons to a depth of 150 m. The mixing of water from various water-bearing horizons proved to be a sufficient measure to obtain water of satisfactory quality with the optimum fluoride concentration.

Ograniczanie wyników

1 Journal of Elementology

1 Glinska-Lewczuk K.

1 Koc J.

1 Wons M.

1 2007

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Influence of hydrogeological conditions on fluorine concentrations in underground water intended for consumption