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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
Published on: July 22, 2019
Simple UV/UV-visible method for nitrogen and phosphorus measurement in wastewater
1Laboratoire Génie de l'Environnement Industriel, Ecole des Mines d'Alès, 6 avenue de Clavières, Alès Cedex, France. benoit.roig@ema.fr
Talanta
|October 31, 2008
Summary
A new UV/UV-visible spectrophotometry method efficiently determines total nitrogen and phosphorus in wastewater. This rapid technique uses photo-oxidation and achieves 80-100% conversion in under 20 minutes.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Water Quality Analysis
Background:
- Accurate measurement of total nitrogen and phosphorus in wastewater is crucial for environmental monitoring and pollution control.
- Existing methods for nutrient analysis can be complex, time-consuming, or require specialized equipment.
Purpose of the Study:
- To develop a simple, rapid, and efficient UV/UV-visible spectrophotometric method for determining global nitrogen and total phosphorus in wastewater.
- To validate the method's performance in terms of conversion yields and analysis time.
Main Methods:
- A two-step method involving photo-oxidation of nitrogen and phosphorus compounds using potassium peroxodisulfate.
- On-line coupling of a UV photo-oxidation reactor with a UV-visible detector for continuous analysis.
- Quantification of nitrate and orthophosphate ions formed during photo-oxidation.
Main Results:
- Achieved conversion yields between 80% and 100% for various nitrogen and phosphorus compounds.
- Successfully determined global nitrogen and total phosphorus in wastewater samples.
- The entire determination process, including sample preparation and analysis, was completed in under 20 minutes.
Conclusions:
- The developed UV/UV-visible method offers a simple and rapid approach for the simultaneous determination of total nitrogen and phosphorus in wastewater.
- This method provides high conversion yields and is suitable for routine environmental monitoring.
- The on-line system streamlines the analytical process, reducing analysis time significantly.
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