Detection of water quality multi-parameters in seawater based on UV-Vis spectrometry

Hu, Yingtian; Wen, Yizhang; Wang, Xiaoping

doi:10.1109/oceansap.2016.7485737

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…PLS regression is a commonly used method to remove the particle's effect on the measurements of water quality parameters based on the multiple wavelength spectra. It has been used to remove the particle's effect on the water quality multi-parameter, such as COD in artificial seawater [62], suspended solid in brackish water [56], COD in lake water [63], COD and TOC in seawater [54] and stream water [17], nitrate in water [53], nitrate and nitrite in seawater [64], DOC in surface water [57] and drinking water [52] and ozone in drinking water [55].…”

Section: User-developed Algorithms For Spectral Absorbance Measurementsmentioning

confidence: 99%

Applications of Online UV-Vis Spectrophotometer for Drinking Water Quality Monitoring and Process Control: A Review

Shi

Chow

Fabris

et al. 2022

Sensors

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Water quality monitoring is an essential component of water quality management for water utilities for managing the drinking water supply. Online UV-Vis spectrophotometers are becoming popular choices for online water quality monitoring and process control, as they are reagent free, do not require sample pre-treatments and can provide continuous measurements. The advantages of the online UV-Vis sensors are that they can capture events and allow quicker responses to water quality changes compared to conventional water quality monitoring. This review summarizes the applications of online UV-Vis spectrophotometers for drinking water quality management in the last two decades. Water quality measurements can be performed directly using the built-in generic algorithms of the online UV-Vis instruments, including absorbance at 254 nm (UV254), colour, dissolved organic carbon (DOC), total organic carbon (TOC), turbidity and nitrate. To enhance the usability of this technique by providing a higher level of operations intelligence, the UV-Vis spectra combined with chemometrics approach offers simplicity, flexibility and applicability. The use of anomaly detection and an early warning was also discussed for drinking water quality monitoring at the source or in the distribution system. As most of the online UV-Vis instruments studies in the drinking water field were conducted at the laboratory- and pilot-scale, future work is needed for industrial-scale evaluation with ab appropriate validation methodology. Issues and potential solutions associated with online instruments for water quality monitoring have been provided. Current technique development outcomes indicate that future research and development work is needed for the integration of early warnings and real-time water treatment process control systems using the online UV-Vis spectrophotometers as part of the water quality management system.

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Section: User-developed Algorithms For Spectral Absorbance Measurementsmentioning

confidence: 99%

Applications of Online UV-Vis Spectrophotometer for Drinking Water Quality Monitoring and Process Control: A Review

Shi

Chow

Fabris

et al. 2022

Sensors

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“…This model was successfully employed in monitoring typical municipal wastewater. Hu et al 19 reduced cross-sensitivity between nitrate and COD through characteristic wavelength selection within the PLS calibration model. They also created a multi-parameter sensor for water quality in the environmental context.…”

Section: Introductionmentioning

confidence: 99%

Effective correction of dissolved organic carbon interference in nitrate detection using ultraviolet spectroscopy combined with the equivalent concentration offset method

Dong,

Tang,

et al. 2024

RSC Adv.

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“…The large amount of data and multiple characteristic information contained in full-spectrum analysis is conducive to the development of spectral analysis retrieval algorithms, which grants the UV-Vis absorption full-spectrum method great potential for application and research value. The UV-Vis absorption spectrum method also has advantages such as fast analysis speed and low cost, making it widely used in rapid analysis of cross-sectional water quality and real-time environmental monitoring [ 6 , 7 , 8 ]. However, in some cases, the UV-Vis absorption spectrum method may not offer sufficient specificity or sensitivity.…”

Section: Introductionmentioning

confidence: 99%

A Method of Water COD Retrieval Based on 1D CNN and 2D Gabor Transform for Absorption–Fluorescence Spectra

et al. 2023

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Chemical Oxygen Demand (COD) is one of the indicators of organic pollution in water bodies. The rapid and accurate detection of COD is of great significance to environmental protection. To address the problem of COD retrieval errors in the absorption spectrum method for fluorescent organic matter solutions, a rapid synchronous COD retrieval method for the absorption–fluorescence spectrum is proposed. Based on a one-dimensional convolutional neural network and 2D Gabor transform, an absorption–fluorescence spectrum fusion neural network algorithm is developed to improve the accuracy of water COD retrieval. Results show that the RRMSEP of the absorption–fluorescence COD retrieval method is 0.32% in amino acid aqueous solution, which is 84% lower than that of the single absorption spectrum method. The accuracy of COD retrieval is 98%, which is 15.3% higher than that of the single absorption spectrum method. The test results on the actual sampled water spectral dataset demonstrate that the fusion network outperformed the absorption spectrum CNN network in measuring COD accuracy, with the RRMSEP improving from 5.09% to 1.15%.

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Detection of water quality multi-parameters in seawater based on UV-Vis spectrometry

Cited by 9 publications

References 6 publications

Applications of Online UV-Vis Spectrophotometer for Drinking Water Quality Monitoring and Process Control: A Review

Applications of Online UV-Vis Spectrophotometer for Drinking Water Quality Monitoring and Process Control: A Review

Effective correction of dissolved organic carbon interference in nitrate detection using ultraviolet spectroscopy combined with the equivalent concentration offset method

A Method of Water COD Retrieval Based on 1D CNN and 2D Gabor Transform for Absorption–Fluorescence Spectra

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