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Updated: Jul 11, 2026

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A model to predict the steady-state concentration of hydroxyl radicals in the surface layer of natural waters
Claudio Minero1, Vittorio Lauri, Valter Maurino
1Dipartimento di Chimica Analitica, Università di Torino, Via P. Giuria 5, 10125 Torino, Italy.
Abstract:
A model was developed to predict the steady-state [*OH] in the surface layer of natural waters as a function of nitrate, inorganic carbon (IC) and dissolved organic matter (DOM). The parameter values were studied in the range detected in shallow high-mountain lakes, to which the model results are most relevant. Calculations indicate that [*OH] increases with increasing nitrate and decreasing IC, and conditions are also identified where [*OH] is directly proportional, inversely proportional or independent of DOM. Based on the model results it is possible to predict the half-life time, due to reaction with *OH, of given dissolved compounds, including organic pollutants, from the water composition data.
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