Simple UV/UV-visible method for nitrogen and phosphorus measurement in wastewater.
A simple UV/UV-visible method is described for the determination of global nitrogen and total phosphorus in wastewater. This method includes two steps: first, the photo-oxidation of nitrogen and phosphorus forms into nitrate and orthophosphate ions, and their quantification by UV-visible spectrophotometry. Potassium peroxodisulfate is used as oxidant. The developed system consists of on-line association of UV photo-oxidation reactor with UV-visible detector. The conversion yields vary between 80 and 100% for both nitrogen compounds (ammonium, urea, amino acids, and other N-containing compounds), and phosphorus compounds (ADP, ATP, and other P-containing compounds). The time requires for nitrogen and phosphorus forms determination is no longer than 20 min.
Roig
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B
Laboratoire Génie de l'Environnement Industriel, Ecole des Mines d'Alès, 6 avenue de Clavières, Alès Cedex, France. benoit.roig@ema.fr
Gonzalez
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C
Thomas
O
O