Non-contact assessment of COD and turbidity concentrations in water using diffuse reflectance UV-Vis spectroscopy
| Autor: | D. Andrew Barry, Luca Rossi, Oliver Akermann, Jon Agustsson |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Pollution
Biological Oxygen Demand Analysis Correlation coefficient Chemistry media_common.quotation_subject Chemical oxygen demand Public Health Environmental and Occupational Health Environmental engineering Water General Medicine Equipment Design Management Monitoring Policy and Law Contamination Wastewater Environmental chemistry Environmental Chemistry Spectrophotometry Ultraviolet Sample collection Turbidity Least-Squares Analysis Spectroscopy Water Pollutants Chemical media_common |
| Zdroj: | Environmental science. Processesimpacts. 16(8) |
| ISSN: | 2050-7895 |
| Popis: | Water contamination is an important environmental concern underlining the need for reliable real-time information on contaminant concentrations in natural waters. Here, a new non-contact UV-Vis spectroscopic approach for monitoring contaminants in water, and especially wastewater, is proposed. Diffuse reflectance UV-Vis spectroscopy was applied to measure simultaneously the chemical oxygen demand (COD) and turbidity (TUR) concentrations in water. The measurements were carried out in the wavelength range from 200-1100 nm. The measured spectra were analysed using partial-least-squares (PLS) regression. The correlation coefficient between the measured and the reference concentrations of COD and TUR in the water samples were R(2) = 0.85 and 0.96, respectively. These results highlight the potential of non-contact UV-Vis spectroscopy for the assessment of water contamination. A system built on the concept would be able to monitor wastewater pollution continuously, without the need for laborious sample collection and subsequent laboratory analysis. Furthermore, since no parts of the system are in contact with the wastewater stream the need for maintenance is minimised. |
| Databáze: | OpenAIRE |
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