Abstract
Water resources are closely linked to human productivity and life. Owing to the deteriorating water resources environment, accurate and rapid determination of the main water quality parameters has become a current research hotspot. Ultraviolet-visible (UV-Vis) spectroscopy offers an effective tool for qualitative analysis and quantitative detection of contaminants in a water environment. In this review, the principle and application of UV-Vis technology in water quality detection were studied. The principle of UV-Vis spectroscopy for detecting water quality parameters and the method of modeling and analysis of spectral data were presented. Various UV-Vis technologies for water quality detection were reviewed according to the types of pollutants, such as chemical oxygen demand, heavy metal ions, nitrate nitrogen, and dissolved organic carbon. Finally, the future development of UV-Vis spectroscopy for the determination of water quality was discussed.
Highlights
Since the 21st century, with the continuous improvement in human living standards, the problems of global climate change, rapid population growth, and environmental pollution have become increasingly serious
In recent years, when using UV-Vis spectroscopy to detect some parameters in water, researchers selected Successive projections algorithm (SPA) to extract the characteristic wavelength of spectral data
After multi-collinearity is eliminated by using Principal component analysis (PCA), principal component variables are taken as independent variables, and the original variables are replaced with the new model based on the score coefficient matrix
Summary
Since the 21st century, with the continuous improvement in human living standards, the problems of global climate change, rapid population growth, and environmental pollution have become increasingly serious. The main factors affecting water quality were determined especially in the latest application progress of ultraviolet spectroscopy technology. A review is very necessary to sort out the research process and methods in introduced the theoretical basis of determining various water quality parameters this field, especially in the latest application ultraviolet spectroscopy by UV-Vis spectroscopy and expounds the progress complete of spectral data analysis process,technology. The is the basis of quantitative analysis of water qualityquality parameters using UV-Vis. Lambert-Beer law isis the basis of analysis of quality parameters using spectroscopy. The nature of the absorbing substance and the wavelength λ of the incident light; a is the concentration of the absorbing substance in mol/L; and l is the thickness of the absorbing layer in cm
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